Organic material combined with inorganic fertilizer has been shown to greatly improve crop yield and maintain soil fertility globally. However, it remains unclear if crop yield and soil fertility can be sustained in t...Organic material combined with inorganic fertilizer has been shown to greatly improve crop yield and maintain soil fertility globally. However, it remains unclear if crop yield and soil fertility can be sustained in the long term under the combined application of organic and inorganic fertilizers. Three long-term field trials were conducted to investigate the effects of organic amendments on the grain sustainable yield index(SYI), soil fertility index(SFI)and nutrient balance in maize–wheat cropping systems of central and southern China during 1991–2019. Five treatments were included in the trials: 1) no fertilization(control);2) balanced mineral fertilization(NPK);3) NPK plus manure(NPKM);4) high dose of NPK plus manure(1.5NPKM);and 5) NPK plus crop straw(NPKS). Over time, the grain yields of wheat and maize showed an increasing trend in all four fertilization treatments at the Yangling(YL) and Zhengzhou(ZZ) locations, while they declined at Qiyang(QY). The grain yield in the NPKM and 1.5NPKM treatments gradually exceeded that of the NPK and NPKS treatments at the QY site. The largest SYI was recorded in the NPKM treatment across the three sites, suggesting that inorganic fertilizer combined with manure can effectively improve crop yield sustainability. Higher SYI values were recorded at the YL and ZZ sites than at the QY site, possibly because the soil was more acid at QY. The key factors affecting grain yield were soil available phosphorus(AP) and available potassium(AK) at the YL and ZZ sites, and pH and AP at the QY site.All fertilization treatments resulted in soil N and P surpluses at the three sites, but soil K surpluses were recorded only at the QY site. The SFI was greater in the 1.5NPKM, NPKM and NPKS treatments than in the NPK treatment by 13.3–40.0 and 16.4–63.6% at the YL and ZZ sites, respectively, and was significantly higher in the NPKM and 1.5NPKM treatments than in the NPK and NPKS treatments at the QY site. A significant, positive linear relationship was found between SFI and crop yield, and SYI and nutrient balance, indicating that grain yield and its sustainability significantly increased with increasing soil fertility. The apparent N, P and K balances positively affected SFI.This study suggests that the appropriate amount of manure mixed with mineral NPK fertilizer is beneficial to the development of sustainable agriculture, which effectively increases the crop yield and yield sustainability by improving soil fertility.展开更多
The Conservation Agriculture (CA) is a current concept drives to save natural resources for agricultural production based on the minimum soil disturbance or no-tillage, crop rotation and permanent maintenance of straw...The Conservation Agriculture (CA) is a current concept drives to save natural resources for agricultural production based on the minimum soil disturbance or no-tillage, crop rotation and permanent maintenance of straw on soil surface. The increasing in soil density is a problem to achieve great copping yield under CA, so occasional one-time tillage is considered as an alternative to continuous no-tillage. In this way, this experiment was carried out to compare occasional tillage and no-tillage interacting with cover crops in a field established under conservation agriculture. Thus, the experimental treatments were set up by two tillage methods, conventional tillage and no-tillage and two cover crops, white lupin and millet setting in a randomized blocks with split plot design with four replications. The traits evaluated in the research were soil fertility, soil resistance to penetration, soil moisture and tomato agronomic performance. No-tillage was more efficient to preserve soil moisture;however soil fertility, soil resistance to penetration and tomato yield were favored by conventional tillage. Regarding to cover crops white lupin increased the soil K concentration and enhanced the tomato growth. Although occasional tillage had better performance to the soil fertility and tomato yield, we highlighted that CA is the better way to increase soil health and soil and water conservation along the time leading to so desired regenerative agriculture.展开更多
A growing global population and the increasing prevalence of diet-related health issues such as“hidden hunger”,obesity,hypertension,and diabetes necessitate a fundamental rethinking of crop design and breeding.Synth...A growing global population and the increasing prevalence of diet-related health issues such as“hidden hunger”,obesity,hypertension,and diabetes necessitate a fundamental rethinking of crop design and breeding.Synthetic metabolic engineering offers a method to modify and redesign metabolic pathways to increase the nutritional value of crops.We summarize recent advances in the biofortification of key nutrients including provitamin A,vitamin C,vitamin B9,iron,zinc,anthocyanins,flavonoids,and unsaturated fatty acids.We discuss the potential of multi-gene stacking,gene editing,enzyme engineering,and artificial intelligence in synthetic metabolic engineering.We propose future research directions and potential solutions centered on leveraging AI-driven systems biology,precision gene editing,enzyme engineering,agrobacterium-mediated genotype-independent transformation,and modular metabolic engineering strategies to develop next-generation nutritionally enhanced super crops and transform global food systems.展开更多
The present review critically examines the role of neglected and underutilized crops(NUCs)in enhancing the resilience of South Asian cropping systems and diets in the context of climate change and nutritional challeng...The present review critically examines the role of neglected and underutilized crops(NUCs)in enhancing the resilience of South Asian cropping systems and diets in the context of climate change and nutritional challenges.This analysis reveals that integrating NUCs,such as millets,sorghums,amaranth,and indigenous legumes,into existing cropping systems can significantly improve the climate resilience,dietary diversity,and ecological sustainability of the food systems.These crops exhibit superior tolerance to abiotic stress and offer higher nutritional density compared to staple cereals,such as rice and wheat.However,their adoption faces challenges,including limited research investment,fragmented value chains,etc.We further identify that complementary cropping strategies and climate-smart agriculture(CSA)practices can optimize resource use while boosting smallholder farmers’income.NUCs are pivotal for the transformation of exist cropping systems towards nutrition-sensitive and climate-resilient agricultural and food systems.Strategic integration of NUCs can simultaneously address food insecurity,biodiversity loss,and rural poverty.Yet,unlocking their potential requires coordinated efforts in genetic improvement,market development,and policy frameworks tailored to regional contexts.This synthesis provides a comprehensive roadmap for policy-makers,researchers,and farmers to leverage NUCs as“Future Smart Food”.By bridging agronomic,nutritional,and socioeconomic perspectives,this study highlights the transformative potential of NUCs in achieving Sustainable Development Goals(SDGs)across South Asian countries.展开更多
[Objectives]This study was conducted to investigate the mechanism of continuous cropping obstacles in Polygonatum odoratum.[Methods]Three treatments were established:continuous cropping(two consecutive crops),first-cr...[Objectives]This study was conducted to investigate the mechanism of continuous cropping obstacles in Polygonatum odoratum.[Methods]Three treatments were established:continuous cropping(two consecutive crops),first-crop control(with Phaseolus vulgaris as the preceding crop),and blank control.The effects of continuous cropping on the functional diversity of soil microorganisms,soil enzyme activities,and soil nutrient coordination in the rhizosphere soil of P.odoratum during different growth stages were investigated.[Results](1)Continuous cropping increased the carbon source metabolic capacity,Shannon diversity index,and richness of rhizosphere soil microorganisms by 3.2%-14.7%,0.9%-3.5%,and 1.3%-12.5%,respectively,but the differences were not significant.(2)Principal component analysis indicated that during the middle stage of rhizome expansion,continuous cropping significantly altered the characteristics of microbial carbon metabolism,and the microbial communities utilizing carbohydrates,amino acids,polymers,carboxylic acids and amines as carbon sources exhibited vigorous metabolism.(3)Continuous cropping significantly reduced the activities of urease,polyphenol oxidase,and acid phosphatase in rhizosphere soil,with decreases of 24.4%-39.5%,3.2%-14.8%,and 7.9%-18.2%,respectively.The activities of catalase and invertase sometimes exceeded and sometimes fell below those of the first crop,showing no consistent pattern.(4)Under continuous cropping conditions,nutrient imbalance occurred in the rhizosphere soil,characterized by nitrogen deficiency and phosphorus surplus.(5)Grey correlation analysis indicated that available phosphorus content,alkali-hydrolyzable nitrogen content and polyphenol oxidase activity in rhizosphere soil were the main factors influencing microbial functional diversity.[Conclusions]This study provides a theoretical basis for understanding the formation mechanism of continuous cropping obstacles in P.odoratum.展开更多
Winter planting green manures in southern China effectively improve soil properties and rice production through microbial community construction.However,the effects of soil communities of arbuscular mycorrhizal fungi(...Winter planting green manures in southern China effectively improve soil properties and rice production through microbial community construction.However,the effects of soil communities of arbuscular mycorrhizal fungi(AMF)from different winter planting green manures on the soil properties and post-cropping rice production remain unclear.In this study,the soil AMF communities of three common winter planting patterns in southern China,winter fallow,winter ryegrass(Lolium multiflorum L.),and winter Chinese milk vetch(Astragalus sinicus L.),were explored and their effects on post-cropping rice production were investigated.Compared with winter fallow,the winter ryegrass and winter Chinese milk vetch patterns could alleviate soil acidification,significantly increase soil AMF spore density,and improve the soil AMF community structure.Based on sterilized soil,rice production indicators such as thousandseed weight,theoretical yield,and the grain amylose and total sugar contents of rice inoculated with AMF spores from winter Chinese milk vetch soil were 6.68–53.57%higher than those without AMF inoculation.Rice panicle weight,seed setting rate,and theoretical yield were 15.38–22.71%higher in the treatment with AMF spores from winter ryegrass soil than in the treatments with no AMF inoculation.In addition,the protein,amylose,and total sugar contents of rice grains were 14.92,104.82,and 802.23 mg kg^(–1),respectively,which were 31.31,14.25 and 34.47%higher than those without AMF inoculation.The AMF community dominated by Glomus and Acaulospora in winter Chinese milk vetch had a more positive effect on the improvement of rice yield,while the AMF community dominated by Glomus in winter ryegrass soil was more conducive to rice quality improvement.These findings have revealed the critical role of AMF communities from green manure in rice production,which lays the theoretical basis for a promising strategy to promote the sustainable development of southern winter agriculture.展开更多
[Objectives]This study was conducted to comprehensively understand the changes in gene expression of plants under environmental stress during different growth and development stages.[Methods]The effects of continuous ...[Objectives]This study was conducted to comprehensively understand the changes in gene expression of plants under environmental stress during different growth and development stages.[Methods]The effects of continuous cropping on the roots and leaves of Polygonatum sibiricum were investigated using transcriptome sequencing.Normally-grown first crop P.sibiricum was used as the control group,while continuous cropping plants served as the treatment group.Transcriptomic differences in roots and leaves under different conditions were compared.[Results]The leaf materials of first crop and continuous cropping P.sibiricum(CCLZ vs FCLZ)showed 21916 differentially expressed genes(DEGs),while the root materials of first crop and continuous cropping P.sibiricum(CCRZ vs FCRZ)exhibited 12726 DEGs(the lowest DEG count)(12726).Among them,1896 DEGs were common.GO enrichment analysis revealed that DEGs were mainly enriched in metabolism,cell wall degradation,and pathogen defense.KEGG enrichment analysis indicated that DEGs in CCLZ vs FCLZ and CCRZ vs FCRZ primarily affected hormone signal transduction and pathogen interaction pathways.[Conclusions]This study preliminarily elucidate the regulatory mechanisms in the roots and leaves of continuous cropping P.sibiricum at the molecular level,providing reference for research on its adaptation to continuous cropping.展开更多
Background Agroecological cropping systems are recognised as an alternative way to ensure the sustainability of cotton(Gossypium hirsutum L.) production in the context of climate change and degradation of soil fertili...Background Agroecological cropping systems are recognised as an alternative way to ensure the sustainability of cotton(Gossypium hirsutum L.) production in the context of climate change and degradation of soil fertility. A study was conducted in Benin from 2020 to 2023 to compare six different cotton cultivars in three agroecological cropping systems in two cotton-growing zones. Plough-based tillage plus incorporation of cover crop biomass(PTI), conservation agriculture with strip tillage(CA_ST), and conservation agriculture with no tillage(CA_NT) were compared with the reference plough-based tillage(PT). The objective was to identify morpho-physiological traits of cotton that increase yield in agroecological cropping systems. Our approach combined a field experiment and crop simulation model(CSM) of CROPGRO-Cotton to evaluate the effects of genotype(G) × environment(E) × management(M) interactions on seed cotton yield(SCY).Results Cultivars Tamcot_camde and Okp768 and simulated ideotypes performed best in CA systems. Increased seed mass, large and thick leaves, and later maturity were identified as beneficial for yield enhancement in CA systems. Cultivars and ideotypes that combine these traits also resulted in better nitrogen and water use efficiencies in CA systems. Under different climate scenarios up to 2050, ideotypes designed could increase SCY in Benin.Conclusion A set of morpho-physiological traits associated with vegetative vigour is required to ensure a good SCY in agroecological cropping systems. These results provide scientific evidence and useful knowledge for breeders and research programmes on cropping systems focused on the adaptation of cotton to climate change.展开更多
A comprehensive understanding of aggregate dynamics is the foundation for establishing sustainable sugarcane production systems,especially in vulnerable red soil ecosystems.While existing studies have established a ba...A comprehensive understanding of aggregate dynamics is the foundation for establishing sustainable sugarcane production systems,especially in vulnerable red soil ecosystems.While existing studies have established a basic understanding of aggregate formation and stabilization,the functional relationship between aggregate stability and erosion resistance under extended sugarcane monoculture remains inadequately characterized.We employed an integrated methodology combining dry/wet sieving,the Le Bissonnais method and scanning electron microscopy to quantitatively evaluate the soil aggregate stability and erosion resistance across six distinct cultivation chrono-sequences(3–32 years)and two soil depths(0–15 cm and 15–30 cm)in the sugarcane cultivation area of Qingshui Village,Wuxuan County,Guangxi Zhuang Autonomous Region,China,aiming at providing insights for developing soil conservation strategies in sugarcane cultivation systems.The results reveal three core findings.First,planting years significantly influence the proportions of soil aggregates with varying particle sizes.Under the treatments with Le Bissonais methods,the mean weight diameter(MWD)under fast wetting,disturbance after pre-wetting,and slow wetting decrease with increasing planting years,while the relative dissipation index,relative mechanical fragmentation index,and erodibility factor(K)exhibit varying degrees of change,indicating progressive soil structural degradation and increased erosion susceptibility.Second,long-term sugarcane monocropping leads to declining soil organic carbon,liquid limit,plastic limit,and clay content,likely due to factors such as soil-forming materials and rainfall.Concurrently,the increased sand content and porosity weaken interparticle bonding and reducing aggregate stability over time.Third,correlation analysis demonstrates that MWD and geometric mean diameter(GMD)under disturbance after pre-wetting and slow wetting treatments show strong positive correlations with soil organic carbon,p H,clay content,liquid limit,and plastic limit but negative correlations with sand content,total porosity,and capillary porosity.Furthermore,K is significantly negatively correlated with soil physicochemical properties as well as GMD and MWD.These results help us understand the mechanism of aggregate stability variation in sugarcane-cultivated red soils and support the development of soil conservation strategies for sustaining sugarcane productivity in subtropical regions.展开更多
State farms,although a minority in China’s agricultural sector,play a critical role in regions like Heilongjiang,leading national food production.However,how state farms(SFs)and rural household farms(RFs)respond to f...State farms,although a minority in China’s agricultural sector,play a critical role in regions like Heilongjiang,leading national food production.However,how state farms(SFs)and rural household farms(RFs)respond to food policies,especially the 2017 soybean subsidy policy(post-Sino–U.S.trade war)and the 2019 soybean revitalization policy,remains unclear.This study examines changes in cropping patterns on SFs and RFs in Heilongjiang from 2013 to 2022 using annual crop maps.We find that SFs,with larger and more clustered fields,responded more effectively to the soybean policies:soybean acreage recovery(2019–2021)reached 91.51%of pre-trade war levels for RFs and 98.2%for SFs;following the revitalization policy,maize-soybean rotations were implemented four times in 62.3%of SFs and 45.4%of RFs.These results highlight the influence of global trade and agricultural policies on cropland management,providing critical insights into sustainable practices and food security across different agricultural systems.展开更多
Continuous cropping can lead to soil environment deterioration,cause plant health problems,and reduce crop productivity.However,the response mechanisms of soil microbial co-occurrence patterns to the duration of conti...Continuous cropping can lead to soil environment deterioration,cause plant health problems,and reduce crop productivity.However,the response mechanisms of soil microbial co-occurrence patterns to the duration of continuous melon cropping remain poorly understood.Here,we employed the metagenomic techniques to comparatively investigate the bulk and rhizosphere soil microbial communities of major melon-producing regions(where the duration of continuous melon cropping ranges from 1 to 30 a)in the eastern and southern parts of Xinjiang Uygur Autonomous Region,China.The results showed that soil pH clearly decreased with increasing melon cropping duration,while soil electrical conductivity(EC)and the other soil nutrient indices increased with increasing melon cropping duration(with the exception of AN and TK in the southern melon-producing region).The most dominant bacterial phyla were Proteobacteria and Actinobacteria,and the most abundant fungal phyla were Ascomycota and Mucoromycota.Redundancy analysis(RDA)indicated that soil pH and EC had no significant effects on the bacterial communities.However,after many years of continuous melon cropping in the southern melon-producing region,fungal communities were significantly negatively correlated with soil pH and significantly positively correlated with soil EC(P<0.050).Co-occurrence network analysis showed that continuous melon cropping increased the complexity but decreased the connectivity of the cross-domain microbial networks.Moreover,the enrichment patterns of microorganisms in the main microbial network modules varied significantly with the duration of continuous melon cropping.Based on the analysis of keystone taxa,we found that continuous melon cropping increased some plant pathogens(e.g.,Fusarium and Stagonospora)but decreased beneficial bacteria(e.g.,Mesorhizobium and Pseudoxanthomonas).In conclusion,this study has greatly enhanced the understanding of the effects of continuous melon cropping on alterations in the microbial community structure and ecological networks in Xinjiang.展开更多
Crops produced using the practice of continuous cropping can become seriously damaged by plant-parasitic nematodes,an important indicator of continuous cropping obstacles.As a typical and important perennial economic ...Crops produced using the practice of continuous cropping can become seriously damaged by plant-parasitic nematodes,an important indicator of continuous cropping obstacles.As a typical and important perennial economic crop,dragon fruit is prone to serious plant-parasitic nematode infestation;however,whether it encounters continuous cropping obstacles remains unclear.Here,we studied plant-parasitic nematodes(Meloidogyne spp.and Tylenchorhynchus sp.)in the soil and roots,soil nematode communities,metabolic footprint,soil integrated fertility,and the yield of intensively planted dragon fruit under non-continuous cropping(Y1)and 3 years(Y3)and 5 years(Y5)of continuous cropping,to determine potential continuous-cropping obstacles and factors that affect the yield of this fruit.The largest numbers of plant-parasitic nematodes in the soil and roots were observed in Y5;the associated yield was reduced,and the dragon fruit was severely stressed.Further analysis of the composition,diversity,and ecological function indices of soil nematodes showed that the soil ecological environment deteriorated after 3 years of continuous cropping,with Y5 having the worst results.Similarly,the soil at Y5 had a significant inhibitory effect on the growth and reproduction of Caenorhabditis elegans.Mantel test analysis and a random forest model showed that soil available phosphorus,soil exchange calcium,and soil nematode abundance and diversity were related significantly to yield.Partial least squares path modeling revealed that soil fertility and soil nematode diversity directly impacts the yield of continuously cropped dragon fruit.In summary,continuous cropping obstacles occurred in Y5 of intensive dragon fruit cultivation,with soil nematode diversity and soil fertility determining the crop's yield.展开更多
Crop yield and quality are affected by abiotic stresses such as drought,low and high temperature,salinity,and heavy metals,which threaten the survival of human beings and the development of industry.As a new plant hor...Crop yield and quality are affected by abiotic stresses such as drought,low and high temperature,salinity,and heavy metals,which threaten the survival of human beings and the development of industry.As a new plant hormone derived from carotenoid,strigolactone(SL)is produced in the roots of plants.It was first reported that SL can induce seed germination of root-parasitic plants.In recent years,it has been shown that strigolactone plays a regulatory role in plant response to abiotic stresses.By eliminating oxidative stress caused by reactive oxygen species,it can potentially increase photosynthetic rate,chlorophyll content,and thus enhance plant drought resistance.Transcriptome studies have explored signal transduction,antioxidant enzyme activity,transcription factors,and expression of stress-and metabolism-related genes induced by extrinsic strigolactone in plants,the effects of strigolactone on plant growth and development have been preliminarily determined,but the studies on inducing crop tolerance to abiotic stresses are still unknown.In this review,the physiological and molecular aspects of the induction of the response to stress in horticultural crops by strigolactone were reviewed.It is important to improve the tolerance and productivity of horticultural crops under abiotic stress.展开更多
[Objectives]This study was conducted to investigate the effects of soil selenium(Se)content and exogenous Se supplementation on crop Se levels and provide a theoretical basis for the production of Se-enriched agricult...[Objectives]This study was conducted to investigate the effects of soil selenium(Se)content and exogenous Se supplementation on crop Se levels and provide a theoretical basis for the production of Se-enriched agricultural products.[Methods]Thirty three representative townships in Xiayi County,Ningling County,and Yongcheng City were selected.Soil Se content and its impact on wheat Se level were measured.The effects of exogenous Se supplementation on the Se content of crops including soybean,wheat,peanut,corn,sweet potato,grape,crisp pear and apple were also investigated.[Results]Showed that the soil Se content in 18 townships of Xiayi County ranged from 0.08 to 0.34 mg/kg,and Se-adequate areas,Se-deficient areas and severely Se-deficient areas accounted for 27.78%,66.67%,and 0.055%of the total,respectively.In Ningling County,the soil Se content in 11 townships ranged from 0.13 to 0.23 mg/kg,and among them,Se-adequate areas and Se-deficient areas comprised 18.18%and 81.82%,respectively.In Yongcheng City,the soil Se content in 4 townships ranged from 0.16 to 0.23 mg/kg,and Se-adequate areas and Se-deficient areas constituted 75.00%and 25.00%,respectively.The soil Se content in 33 townships across Xiayi County,Ningling County,and Yongcheng City ranged from 0.07 to 0.34 mg/kg.However,the Se levels in wheat from all 33 townships fail to meet the standard for Se-enriched agricultural products.It indicates that relying solely on soil Se supply is insufficient for crops to achieve the Se level required for Se-enriched agricultural products.Exogenous Se supplementation could effectively increase the Se content in soybean,wheat,peanut,corn,sweet potato,grape,crisp pear,and apple.Among these,soybean,wheat and peanut showed the highest Se levels after supplementation,all exceeding 0.10 mg/kg and meeting the industry standard for Se-enriched agricultural products.[Conclusions]The results of this study indicates that exogenous Se supplementation can serve as a key measure for producing Se-enriched agricultural products.展开更多
Industrial activities have caused widespread arsenic(As)contamination in soil and medicinal crops across south-ern Asia.This study constructed interplanting systems combing medicinal crops with Pteris vittata L.,aimin...Industrial activities have caused widespread arsenic(As)contamination in soil and medicinal crops across south-ern Asia.This study constructed interplanting systems combing medicinal crops with Pteris vittata L.,aiming to mitigate the risk of As exposure in medicinal crops,while simultaneously achieving ecological remediation of contaminated soil.The results revealed that interplanting with P.vittata significantly enhanced the yield of Gynos-temma pentaphyllum by 31.90%(P<0.05)compared with monoculture systems.Under monoculture conditions,the As concentration in G.pentaphyllum leaves reached 2.34 mg/kg,exceeding the national food safety standard(GB2762–2017,2 mg/kg).However,interplanting with P.vittata effectively reduced the As concentration in G.pentaphyllum leaves to 1.82 mg/kg.Furthermore,the interplanting of P.vittata with Rhus chinensis significantly inhibited As translocation from belowground to aboveground tissues in R.chinensis.Compared to monoculture,the stem biomass of P.vittata was significantly increased by 57.50%and 70.32%when interplanted with G.pentaphyllum and Cassia obtusifolia L.(P<0.05).So the As enrichment of P.vittata was enhanced in interplanting systems,which is beneficial for the As removal from contaminated soil.The study demonstrated that interplant-ing primarily regulates plant As uptake through modifications of rhizosphere physicochemical properties and As bioavailability,especially for water-soluble As that is easily absorbed by plants.In conclusion,the interplant-ing models integrating medicinal crops and P.vittata can achieve the goal of“remediating while producing”in As-contaminated soil.展开更多
With ongoing global climate change,drought has become the primary threat constraining food security in China.Traditional assessment frameworks based on administrative boundaries or macro-climatic zoning overlook varia...With ongoing global climate change,drought has become the primary threat constraining food security in China.Traditional assessment frameworks based on administrative boundaries or macro-climatic zoning overlook variation in vulnerability affected by key agronomic practices,such as crop phenology and cropping systems,thereby limiting their accuracy.To address this research gap,this study developed and validated a novel drought risk assessment framework based on agricultural cropping zones(single-,double-,and triple-cropping zones).The framework coupled a Geographical and Temporal Neural Network Weighted Regression(GTNNWR)model for forecasting future crop vegetation dynamics with the Standardized Precipitation Evapotranspiration Index(SPEI)to assess drought risk under historical(2001-2020)and projected future(2021-2100)scenarios.The GTNNWR model achieved R^(2) values ranging from 0.72 to 0.82 and RMSE values between 0.11 and 0.14 for NDVI prediction,significantly outperforming conventional models.Historical drought risk assessment revealed that drought events were most frequent during summer and concentrated in single-cropping and double-cropping zones.Future projections indicate a substantial intensification of drought risk.Under the Shared Socioeconomic Pathway(SSP)126 scenario,drought risk is projected to increase in the triple-cropping zones of the middle and lower reaches of the Yangtze River Plain.Under the SSP245 scenario,the frequency of spring and winter droughts is anticipated to rise markedly.Under the SSP585 scenario,drought intensity is projected to intensify in central–eastern single-cropping zones and southwestern double-cropping zones.This assessment framework based on agricultural cropping zones can precisely identify drought risks and facilitate adaptation in agricultural management,such as optimizing irrigation systems and adjusting crop structures.展开更多
Vegetation plays an important role in the environmental transport behavior of organic pollutants,however,the different roles of crops and natural vegetation have been ignored in most previous studies.In this study,we ...Vegetation plays an important role in the environmental transport behavior of organic pollutants,however,the different roles of crops and natural vegetation have been ignored in most previous studies.In this study,we developed the BETR-Urban-Rural-Veg model to quantitatively evaluate the influences of both natural vegetation and crops on the multimedia transport processes of Phenanthrene(PHE)and Benzo(a)pyrene(BaP)in mainland of China.The geographic distribution of polycyclic aromatic hydrocarbon(PAH)emissions and concentrations were consistent,displaying higher levels in northern China while lower levels in southern China.Under seasonal simulations,for both natural vegetation and crops,PAH concentrations in winter and spring were 1.5 to 27-fold higher than in summer and autumn,especially for PHE.Owing to the higher leaf area index(LAI)of natural vegetation and harvesting of crops,the filter and sequestration effect of natural vegetation was stronger than crops,while the seasonal changes of PAH concentrations in crops were more significant than natural vegetation.Temperature,precipitation rates and LAI might have important influences on seasonal concentrations and overall persistence of PAHs.PHE was more sensitive to the impacts of seasonal environmental parameters.Under different landscape scenarios,average annual PAH concentrations in natural vegetation were always a little higher than those in crops,and the overall persistence of BaP was greatly affected increasing by 15.15%-16.47%.This improved model provides a useful tool for environmental management.The results of this study are expected to support land use plans and decision-making in China's mainland.展开更多
Plants produce a vast array of specialized metabolites that serve as essential defenses against herbivores and pathogens.However,the capacity to produce these compounds differs substantially among plant species and is...Plants produce a vast array of specialized metabolites that serve as essential defenses against herbivores and pathogens.However,the capacity to produce these compounds differs substantially among plant species and is frequently diminished during domestication.Advances in synthetic metabolic engineering enable efficient elucidation and engineering of plant specialized metabolic pathways active in crop pest and pathogen resistance.This review summarizes strategies and workflows for selecting defensive metabolic pathways,identifying candidate biosynthetic genes,and rewiring native or introducing heterologous pathways to enhance crop resistance to pests and pathogens.Strategies include weighted gene co-expression network construction,biosynthetic gene cluster scanning,and metabolite genome-wide association studies for pathway discovery,as well as transcriptional reprogramming,enzyme activity optimization,and transporter deployment for pathway engineering.We further discuss challenges in using synthetic metabolic engineering to enhance crop resistance and highlight the potential of artificial intelligence in addressing them.展开更多
Global population pressures have necessitated increased focus on protecting and developing resilient plant species that can maintain productivity despite environmental challenges.Environmental degradation,driven by cl...Global population pressures have necessitated increased focus on protecting and developing resilient plant species that can maintain productivity despite environmental challenges.Environmental degradation,driven by climate change and anthropogenic activities,poses significant threats to global food security through various forms of physical stress.Major environmental constraints affecting agricultural yields worldwide include salinity,water scarcity,nutritional imbalances(encompassing mineral toxicity and deficiencies),and extreme temperatures.Crop yield is influenced by multiple abiotic factors,including agronomic conditions,climatic variables,and soil nutrient availability.Plants develop various survival mechanisms at molecular,cellular,and physiological levels in response to stress.Abiotic stress,whether occurring individually or in combination,significantly impacts crop growth and productivity.For instance,drought stress reduces leaf area,plant height,and overall crop development.Cold stress inhibits plant development and crop efficiency,leading to diminished productivity.Salinity stress not only induces water stress in plants but also negatively affects cytosolic metabolism,cell development,membrane function,and increases reactive oxygen species(ROS)production.Elevated CO_(2)concentrations may enhance global precipitation patterns,potentially resulting in increased rainfall that can adversely affect crop development.Plants under excessive water stress exhibit reduced amylose content but increased crude protein levels.This affects both quality and quantity of crop production by inhibiting seed germination and causing growth impairment through combined effects of elevated osmotic potential and ion toxicity.Plants have evolved various escape-avoidance and tolerance mechanisms in response to abiotic stress,including physiological adaptations and integrated cellular or molecular responses.This review paper examines the impact of abiotic stress on morpho-physiological,biochemical,and molecular activities across various crops.Additionally,it analyzes crop interactions with abiotic stress regarding response and adaptation mechanisms,providing a fundamental framework for species selection and development of stress-tolerant varieties in the future.展开更多
[Objective] This study aimed to explore the impact of climate change on wheat cropping by using province-specific historical data during 1996-2007. [Method] We established a panel data econometric model with lagged wh...[Objective] This study aimed to explore the impact of climate change on wheat cropping by using province-specific historical data during 1996-2007. [Method] We established a panel data econometric model with lagged wheat cropping area and province-specific fixed-effects model to control the unobserved factors. [Result] The results showed that the temperature positively affects wheat cropping area, while precipitation does not have such impact. [Conclusion] The study provided empirical evidence for analysis of the determinants of wheat cropping area in China.展开更多
基金supported by the National Natural Science Foundation of China(42177341)the Natural Science Basic Research Program of Shanxi,China(202203021222138).
文摘Organic material combined with inorganic fertilizer has been shown to greatly improve crop yield and maintain soil fertility globally. However, it remains unclear if crop yield and soil fertility can be sustained in the long term under the combined application of organic and inorganic fertilizers. Three long-term field trials were conducted to investigate the effects of organic amendments on the grain sustainable yield index(SYI), soil fertility index(SFI)and nutrient balance in maize–wheat cropping systems of central and southern China during 1991–2019. Five treatments were included in the trials: 1) no fertilization(control);2) balanced mineral fertilization(NPK);3) NPK plus manure(NPKM);4) high dose of NPK plus manure(1.5NPKM);and 5) NPK plus crop straw(NPKS). Over time, the grain yields of wheat and maize showed an increasing trend in all four fertilization treatments at the Yangling(YL) and Zhengzhou(ZZ) locations, while they declined at Qiyang(QY). The grain yield in the NPKM and 1.5NPKM treatments gradually exceeded that of the NPK and NPKS treatments at the QY site. The largest SYI was recorded in the NPKM treatment across the three sites, suggesting that inorganic fertilizer combined with manure can effectively improve crop yield sustainability. Higher SYI values were recorded at the YL and ZZ sites than at the QY site, possibly because the soil was more acid at QY. The key factors affecting grain yield were soil available phosphorus(AP) and available potassium(AK) at the YL and ZZ sites, and pH and AP at the QY site.All fertilization treatments resulted in soil N and P surpluses at the three sites, but soil K surpluses were recorded only at the QY site. The SFI was greater in the 1.5NPKM, NPKM and NPKS treatments than in the NPK treatment by 13.3–40.0 and 16.4–63.6% at the YL and ZZ sites, respectively, and was significantly higher in the NPKM and 1.5NPKM treatments than in the NPK and NPKS treatments at the QY site. A significant, positive linear relationship was found between SFI and crop yield, and SYI and nutrient balance, indicating that grain yield and its sustainability significantly increased with increasing soil fertility. The apparent N, P and K balances positively affected SFI.This study suggests that the appropriate amount of manure mixed with mineral NPK fertilizer is beneficial to the development of sustainable agriculture, which effectively increases the crop yield and yield sustainability by improving soil fertility.
文摘The Conservation Agriculture (CA) is a current concept drives to save natural resources for agricultural production based on the minimum soil disturbance or no-tillage, crop rotation and permanent maintenance of straw on soil surface. The increasing in soil density is a problem to achieve great copping yield under CA, so occasional one-time tillage is considered as an alternative to continuous no-tillage. In this way, this experiment was carried out to compare occasional tillage and no-tillage interacting with cover crops in a field established under conservation agriculture. Thus, the experimental treatments were set up by two tillage methods, conventional tillage and no-tillage and two cover crops, white lupin and millet setting in a randomized blocks with split plot design with four replications. The traits evaluated in the research were soil fertility, soil resistance to penetration, soil moisture and tomato agronomic performance. No-tillage was more efficient to preserve soil moisture;however soil fertility, soil resistance to penetration and tomato yield were favored by conventional tillage. Regarding to cover crops white lupin increased the soil K concentration and enhanced the tomato growth. Although occasional tillage had better performance to the soil fertility and tomato yield, we highlighted that CA is the better way to increase soil health and soil and water conservation along the time leading to so desired regenerative agriculture.
基金supported by grants from the Guangxi Science and Technology Major Project(GKAA24206023)the Biological Breeding-National Science and Technology Major Project(2024ZD04077)+2 种基金the National Natural Science Foundation of China(32272120)the National Key Research and Development Program of China(2024YFF1000800)the Guangdong Basic Research Center of Excellence for Precise Breeding of Future Crops Major Project(FCBRCE-202502,FCBRCE-202504).
文摘A growing global population and the increasing prevalence of diet-related health issues such as“hidden hunger”,obesity,hypertension,and diabetes necessitate a fundamental rethinking of crop design and breeding.Synthetic metabolic engineering offers a method to modify and redesign metabolic pathways to increase the nutritional value of crops.We summarize recent advances in the biofortification of key nutrients including provitamin A,vitamin C,vitamin B9,iron,zinc,anthocyanins,flavonoids,and unsaturated fatty acids.We discuss the potential of multi-gene stacking,gene editing,enzyme engineering,and artificial intelligence in synthetic metabolic engineering.We propose future research directions and potential solutions centered on leveraging AI-driven systems biology,precision gene editing,enzyme engineering,agrobacterium-mediated genotype-independent transformation,and modular metabolic engineering strategies to develop next-generation nutritionally enhanced super crops and transform global food systems.
文摘The present review critically examines the role of neglected and underutilized crops(NUCs)in enhancing the resilience of South Asian cropping systems and diets in the context of climate change and nutritional challenges.This analysis reveals that integrating NUCs,such as millets,sorghums,amaranth,and indigenous legumes,into existing cropping systems can significantly improve the climate resilience,dietary diversity,and ecological sustainability of the food systems.These crops exhibit superior tolerance to abiotic stress and offer higher nutritional density compared to staple cereals,such as rice and wheat.However,their adoption faces challenges,including limited research investment,fragmented value chains,etc.We further identify that complementary cropping strategies and climate-smart agriculture(CSA)practices can optimize resource use while boosting smallholder farmers’income.NUCs are pivotal for the transformation of exist cropping systems towards nutrition-sensitive and climate-resilient agricultural and food systems.Strategic integration of NUCs can simultaneously address food insecurity,biodiversity loss,and rural poverty.Yet,unlocking their potential requires coordinated efforts in genetic improvement,market development,and policy frameworks tailored to regional contexts.This synthesis provides a comprehensive roadmap for policy-makers,researchers,and farmers to leverage NUCs as“Future Smart Food”.By bridging agronomic,nutritional,and socioeconomic perspectives,this study highlights the transformative potential of NUCs in achieving Sustainable Development Goals(SDGs)across South Asian countries.
文摘[Objectives]This study was conducted to investigate the mechanism of continuous cropping obstacles in Polygonatum odoratum.[Methods]Three treatments were established:continuous cropping(two consecutive crops),first-crop control(with Phaseolus vulgaris as the preceding crop),and blank control.The effects of continuous cropping on the functional diversity of soil microorganisms,soil enzyme activities,and soil nutrient coordination in the rhizosphere soil of P.odoratum during different growth stages were investigated.[Results](1)Continuous cropping increased the carbon source metabolic capacity,Shannon diversity index,and richness of rhizosphere soil microorganisms by 3.2%-14.7%,0.9%-3.5%,and 1.3%-12.5%,respectively,but the differences were not significant.(2)Principal component analysis indicated that during the middle stage of rhizome expansion,continuous cropping significantly altered the characteristics of microbial carbon metabolism,and the microbial communities utilizing carbohydrates,amino acids,polymers,carboxylic acids and amines as carbon sources exhibited vigorous metabolism.(3)Continuous cropping significantly reduced the activities of urease,polyphenol oxidase,and acid phosphatase in rhizosphere soil,with decreases of 24.4%-39.5%,3.2%-14.8%,and 7.9%-18.2%,respectively.The activities of catalase and invertase sometimes exceeded and sometimes fell below those of the first crop,showing no consistent pattern.(4)Under continuous cropping conditions,nutrient imbalance occurred in the rhizosphere soil,characterized by nitrogen deficiency and phosphorus surplus.(5)Grey correlation analysis indicated that available phosphorus content,alkali-hydrolyzable nitrogen content and polyphenol oxidase activity in rhizosphere soil were the main factors influencing microbial functional diversity.[Conclusions]This study provides a theoretical basis for understanding the formation mechanism of continuous cropping obstacles in P.odoratum.
基金supported by the National Natural Science Foundation of China(32171683)the Shenzhen Science and Technology Program,China(JCYJ20220530145606015)+4 种基金the Agricultural and Social Development Project of Guangzhou Municipal Science and Technology Bureau,China(202206010058)the Special Fund for Agro-scientific Research in the Public Interest of China(201503122)the Natural Science Foundation of Guangdong Province,China(2020A1515010494)the Yangfan Innovative&Entrepreneurial Research Team Project,China(2015YT02H032)the Zhang Hong-da Science Research Fund of Sun Yat-sen University,China。
文摘Winter planting green manures in southern China effectively improve soil properties and rice production through microbial community construction.However,the effects of soil communities of arbuscular mycorrhizal fungi(AMF)from different winter planting green manures on the soil properties and post-cropping rice production remain unclear.In this study,the soil AMF communities of three common winter planting patterns in southern China,winter fallow,winter ryegrass(Lolium multiflorum L.),and winter Chinese milk vetch(Astragalus sinicus L.),were explored and their effects on post-cropping rice production were investigated.Compared with winter fallow,the winter ryegrass and winter Chinese milk vetch patterns could alleviate soil acidification,significantly increase soil AMF spore density,and improve the soil AMF community structure.Based on sterilized soil,rice production indicators such as thousandseed weight,theoretical yield,and the grain amylose and total sugar contents of rice inoculated with AMF spores from winter Chinese milk vetch soil were 6.68–53.57%higher than those without AMF inoculation.Rice panicle weight,seed setting rate,and theoretical yield were 15.38–22.71%higher in the treatment with AMF spores from winter ryegrass soil than in the treatments with no AMF inoculation.In addition,the protein,amylose,and total sugar contents of rice grains were 14.92,104.82,and 802.23 mg kg^(–1),respectively,which were 31.31,14.25 and 34.47%higher than those without AMF inoculation.The AMF community dominated by Glomus and Acaulospora in winter Chinese milk vetch had a more positive effect on the improvement of rice yield,while the AMF community dominated by Glomus in winter ryegrass soil was more conducive to rice quality improvement.These findings have revealed the critical role of AMF communities from green manure in rice production,which lays the theoretical basis for a promising strategy to promote the sustainable development of southern winter agriculture.
基金Supported by Agricultural Science and Technology Innovation Fund of Hunan Province(XCNZ[2021]No.15)Loudi Science and Technology Innovation Program(LKF[2022]29)+1 种基金Applied Characteristic Discipline Construction Project of Hunan Province:Plant ProtectionPostgraduate Research and Innovation Project of Hunan University of Humanities,Science and Technology(ZSCX2022Y12).
文摘[Objectives]This study was conducted to comprehensively understand the changes in gene expression of plants under environmental stress during different growth and development stages.[Methods]The effects of continuous cropping on the roots and leaves of Polygonatum sibiricum were investigated using transcriptome sequencing.Normally-grown first crop P.sibiricum was used as the control group,while continuous cropping plants served as the treatment group.Transcriptomic differences in roots and leaves under different conditions were compared.[Results]The leaf materials of first crop and continuous cropping P.sibiricum(CCLZ vs FCLZ)showed 21916 differentially expressed genes(DEGs),while the root materials of first crop and continuous cropping P.sibiricum(CCRZ vs FCRZ)exhibited 12726 DEGs(the lowest DEG count)(12726).Among them,1896 DEGs were common.GO enrichment analysis revealed that DEGs were mainly enriched in metabolism,cell wall degradation,and pathogen defense.KEGG enrichment analysis indicated that DEGs in CCLZ vs FCLZ and CCRZ vs FCRZ primarily affected hormone signal transduction and pathogen interaction pathways.[Conclusions]This study preliminarily elucidate the regulatory mechanisms in the roots and leaves of continuous cropping P.sibiricum at the molecular level,providing reference for research on its adaptation to continuous cropping.
基金supported by the Benin Cotton Research Institute (IRC)the Cotton Interprofessional Association (AIC)+1 种基金the French Agricultural Research Centre for International Development (CIRAD)the TAZCO_(2) project (Transition Agroécologique des Zones Cotonnières du Bénin),which is funded by the Republic of Benin and the French Development Agency (AFD)。
文摘Background Agroecological cropping systems are recognised as an alternative way to ensure the sustainability of cotton(Gossypium hirsutum L.) production in the context of climate change and degradation of soil fertility. A study was conducted in Benin from 2020 to 2023 to compare six different cotton cultivars in three agroecological cropping systems in two cotton-growing zones. Plough-based tillage plus incorporation of cover crop biomass(PTI), conservation agriculture with strip tillage(CA_ST), and conservation agriculture with no tillage(CA_NT) were compared with the reference plough-based tillage(PT). The objective was to identify morpho-physiological traits of cotton that increase yield in agroecological cropping systems. Our approach combined a field experiment and crop simulation model(CSM) of CROPGRO-Cotton to evaluate the effects of genotype(G) × environment(E) × management(M) interactions on seed cotton yield(SCY).Results Cultivars Tamcot_camde and Okp768 and simulated ideotypes performed best in CA systems. Increased seed mass, large and thick leaves, and later maturity were identified as beneficial for yield enhancement in CA systems. Cultivars and ideotypes that combine these traits also resulted in better nitrogen and water use efficiencies in CA systems. Under different climate scenarios up to 2050, ideotypes designed could increase SCY in Benin.Conclusion A set of morpho-physiological traits associated with vegetative vigour is required to ensure a good SCY in agroecological cropping systems. These results provide scientific evidence and useful knowledge for breeders and research programmes on cropping systems focused on the adaptation of cotton to climate change.
基金financial support for the research provided by the National Natural Science Foundation of China(No.42107350)the National Key Research,Development Program of China(No.2023YFD1902801)the Central Government Guides the Development of Local Science and Technology Project,Grant/Award Number:Guike ZY21195022。
文摘A comprehensive understanding of aggregate dynamics is the foundation for establishing sustainable sugarcane production systems,especially in vulnerable red soil ecosystems.While existing studies have established a basic understanding of aggregate formation and stabilization,the functional relationship between aggregate stability and erosion resistance under extended sugarcane monoculture remains inadequately characterized.We employed an integrated methodology combining dry/wet sieving,the Le Bissonnais method and scanning electron microscopy to quantitatively evaluate the soil aggregate stability and erosion resistance across six distinct cultivation chrono-sequences(3–32 years)and two soil depths(0–15 cm and 15–30 cm)in the sugarcane cultivation area of Qingshui Village,Wuxuan County,Guangxi Zhuang Autonomous Region,China,aiming at providing insights for developing soil conservation strategies in sugarcane cultivation systems.The results reveal three core findings.First,planting years significantly influence the proportions of soil aggregates with varying particle sizes.Under the treatments with Le Bissonais methods,the mean weight diameter(MWD)under fast wetting,disturbance after pre-wetting,and slow wetting decrease with increasing planting years,while the relative dissipation index,relative mechanical fragmentation index,and erodibility factor(K)exhibit varying degrees of change,indicating progressive soil structural degradation and increased erosion susceptibility.Second,long-term sugarcane monocropping leads to declining soil organic carbon,liquid limit,plastic limit,and clay content,likely due to factors such as soil-forming materials and rainfall.Concurrently,the increased sand content and porosity weaken interparticle bonding and reducing aggregate stability over time.Third,correlation analysis demonstrates that MWD and geometric mean diameter(GMD)under disturbance after pre-wetting and slow wetting treatments show strong positive correlations with soil organic carbon,p H,clay content,liquid limit,and plastic limit but negative correlations with sand content,total porosity,and capillary porosity.Furthermore,K is significantly negatively correlated with soil physicochemical properties as well as GMD and MWD.These results help us understand the mechanism of aggregate stability variation in sugarcane-cultivated red soils and support the development of soil conservation strategies for sustaining sugarcane productivity in subtropical regions.
基金supported by the National Key Research and Development Program of China(Grant No.2023YFD1500200)the National Natural Science Foundation of China(Grants No.72221002,42271375,42461144212)+2 种基金the Informatization Plan of the Chinese Academy of Sciences(Grant No.CAS-WX2021PY-0109)the funding project of Northeast Geological S&T Innovation Center Zone of China Geological Survey(Grant No.QCJJ2022-9)the funding project of China Association for Science and Technology(Grant No.XMSB20240927024).
文摘State farms,although a minority in China’s agricultural sector,play a critical role in regions like Heilongjiang,leading national food production.However,how state farms(SFs)and rural household farms(RFs)respond to food policies,especially the 2017 soybean subsidy policy(post-Sino–U.S.trade war)and the 2019 soybean revitalization policy,remains unclear.This study examines changes in cropping patterns on SFs and RFs in Heilongjiang from 2013 to 2022 using annual crop maps.We find that SFs,with larger and more clustered fields,responded more effectively to the soybean policies:soybean acreage recovery(2019–2021)reached 91.51%of pre-trade war levels for RFs and 98.2%for SFs;following the revitalization policy,maize-soybean rotations were implemented four times in 62.3%of SFs and 45.4%of RFs.These results highlight the influence of global trade and agricultural policies on cropland management,providing critical insights into sustainable practices and food security across different agricultural systems.
基金funded by the Major Science and Technology Projects of Xinjiang Uygur Autonomous Region(2022A02007-4)the Xinjiang Uygur Autonomous Region Natural Science Foundation Youth Project(2024D01B31)the Graduate Student Research Innovation Project of Xinjiang Agricultural University(XJAUGRI2024033).
文摘Continuous cropping can lead to soil environment deterioration,cause plant health problems,and reduce crop productivity.However,the response mechanisms of soil microbial co-occurrence patterns to the duration of continuous melon cropping remain poorly understood.Here,we employed the metagenomic techniques to comparatively investigate the bulk and rhizosphere soil microbial communities of major melon-producing regions(where the duration of continuous melon cropping ranges from 1 to 30 a)in the eastern and southern parts of Xinjiang Uygur Autonomous Region,China.The results showed that soil pH clearly decreased with increasing melon cropping duration,while soil electrical conductivity(EC)and the other soil nutrient indices increased with increasing melon cropping duration(with the exception of AN and TK in the southern melon-producing region).The most dominant bacterial phyla were Proteobacteria and Actinobacteria,and the most abundant fungal phyla were Ascomycota and Mucoromycota.Redundancy analysis(RDA)indicated that soil pH and EC had no significant effects on the bacterial communities.However,after many years of continuous melon cropping in the southern melon-producing region,fungal communities were significantly negatively correlated with soil pH and significantly positively correlated with soil EC(P<0.050).Co-occurrence network analysis showed that continuous melon cropping increased the complexity but decreased the connectivity of the cross-domain microbial networks.Moreover,the enrichment patterns of microorganisms in the main microbial network modules varied significantly with the duration of continuous melon cropping.Based on the analysis of keystone taxa,we found that continuous melon cropping increased some plant pathogens(e.g.,Fusarium and Stagonospora)but decreased beneficial bacteria(e.g.,Mesorhizobium and Pseudoxanthomonas).In conclusion,this study has greatly enhanced the understanding of the effects of continuous melon cropping on alterations in the microbial community structure and ecological networks in Xinjiang.
基金supported by the National Key Research and Development Program of China(2023YFD1700203and 2022YFD1901501)the Tianchi Talent Introduction Program of Xinjiang Autonomous Region,China(2023-“2+5”)the Tingzhou Talent Introduction Program of Changji Autonomous Region,China(2023)。
文摘Crops produced using the practice of continuous cropping can become seriously damaged by plant-parasitic nematodes,an important indicator of continuous cropping obstacles.As a typical and important perennial economic crop,dragon fruit is prone to serious plant-parasitic nematode infestation;however,whether it encounters continuous cropping obstacles remains unclear.Here,we studied plant-parasitic nematodes(Meloidogyne spp.and Tylenchorhynchus sp.)in the soil and roots,soil nematode communities,metabolic footprint,soil integrated fertility,and the yield of intensively planted dragon fruit under non-continuous cropping(Y1)and 3 years(Y3)and 5 years(Y5)of continuous cropping,to determine potential continuous-cropping obstacles and factors that affect the yield of this fruit.The largest numbers of plant-parasitic nematodes in the soil and roots were observed in Y5;the associated yield was reduced,and the dragon fruit was severely stressed.Further analysis of the composition,diversity,and ecological function indices of soil nematodes showed that the soil ecological environment deteriorated after 3 years of continuous cropping,with Y5 having the worst results.Similarly,the soil at Y5 had a significant inhibitory effect on the growth and reproduction of Caenorhabditis elegans.Mantel test analysis and a random forest model showed that soil available phosphorus,soil exchange calcium,and soil nematode abundance and diversity were related significantly to yield.Partial least squares path modeling revealed that soil fertility and soil nematode diversity directly impacts the yield of continuously cropped dragon fruit.In summary,continuous cropping obstacles occurred in Y5 of intensive dragon fruit cultivation,with soil nematode diversity and soil fertility determining the crop's yield.
基金supported by the Special projects on biological seed industry and intensive processing of agricultural products(Grant No.202402AE090004-02)National Key R&D Program of China(Grant No.2023YFD2001404)+1 种基金Technology talent and platform program(Grant No.202305AF150112)China Agriculture Research System of MOF and MARA(Grant No.CARS-29-zp-6).
文摘Crop yield and quality are affected by abiotic stresses such as drought,low and high temperature,salinity,and heavy metals,which threaten the survival of human beings and the development of industry.As a new plant hormone derived from carotenoid,strigolactone(SL)is produced in the roots of plants.It was first reported that SL can induce seed germination of root-parasitic plants.In recent years,it has been shown that strigolactone plays a regulatory role in plant response to abiotic stresses.By eliminating oxidative stress caused by reactive oxygen species,it can potentially increase photosynthetic rate,chlorophyll content,and thus enhance plant drought resistance.Transcriptome studies have explored signal transduction,antioxidant enzyme activity,transcription factors,and expression of stress-and metabolism-related genes induced by extrinsic strigolactone in plants,the effects of strigolactone on plant growth and development have been preliminarily determined,but the studies on inducing crop tolerance to abiotic stresses are still unknown.In this review,the physiological and molecular aspects of the induction of the response to stress in horticultural crops by strigolactone were reviewed.It is important to improve the tolerance and productivity of horticultural crops under abiotic stress.
基金Supported by Shangqiu Science and Technology Project(20240036).
文摘[Objectives]This study was conducted to investigate the effects of soil selenium(Se)content and exogenous Se supplementation on crop Se levels and provide a theoretical basis for the production of Se-enriched agricultural products.[Methods]Thirty three representative townships in Xiayi County,Ningling County,and Yongcheng City were selected.Soil Se content and its impact on wheat Se level were measured.The effects of exogenous Se supplementation on the Se content of crops including soybean,wheat,peanut,corn,sweet potato,grape,crisp pear and apple were also investigated.[Results]Showed that the soil Se content in 18 townships of Xiayi County ranged from 0.08 to 0.34 mg/kg,and Se-adequate areas,Se-deficient areas and severely Se-deficient areas accounted for 27.78%,66.67%,and 0.055%of the total,respectively.In Ningling County,the soil Se content in 11 townships ranged from 0.13 to 0.23 mg/kg,and among them,Se-adequate areas and Se-deficient areas comprised 18.18%and 81.82%,respectively.In Yongcheng City,the soil Se content in 4 townships ranged from 0.16 to 0.23 mg/kg,and Se-adequate areas and Se-deficient areas constituted 75.00%and 25.00%,respectively.The soil Se content in 33 townships across Xiayi County,Ningling County,and Yongcheng City ranged from 0.07 to 0.34 mg/kg.However,the Se levels in wheat from all 33 townships fail to meet the standard for Se-enriched agricultural products.It indicates that relying solely on soil Se supply is insufficient for crops to achieve the Se level required for Se-enriched agricultural products.Exogenous Se supplementation could effectively increase the Se content in soybean,wheat,peanut,corn,sweet potato,grape,crisp pear,and apple.Among these,soybean,wheat and peanut showed the highest Se levels after supplementation,all exceeding 0.10 mg/kg and meeting the industry standard for Se-enriched agricultural products.[Conclusions]The results of this study indicates that exogenous Se supplementation can serve as a key measure for producing Se-enriched agricultural products.
基金supported by the National Key Research and Development Program of China(No.2020YFC1807805)the Science and Technology Planning Project of Guangzhou,Guangdong Province,China(No.202206010176).
文摘Industrial activities have caused widespread arsenic(As)contamination in soil and medicinal crops across south-ern Asia.This study constructed interplanting systems combing medicinal crops with Pteris vittata L.,aiming to mitigate the risk of As exposure in medicinal crops,while simultaneously achieving ecological remediation of contaminated soil.The results revealed that interplanting with P.vittata significantly enhanced the yield of Gynos-temma pentaphyllum by 31.90%(P<0.05)compared with monoculture systems.Under monoculture conditions,the As concentration in G.pentaphyllum leaves reached 2.34 mg/kg,exceeding the national food safety standard(GB2762–2017,2 mg/kg).However,interplanting with P.vittata effectively reduced the As concentration in G.pentaphyllum leaves to 1.82 mg/kg.Furthermore,the interplanting of P.vittata with Rhus chinensis significantly inhibited As translocation from belowground to aboveground tissues in R.chinensis.Compared to monoculture,the stem biomass of P.vittata was significantly increased by 57.50%and 70.32%when interplanted with G.pentaphyllum and Cassia obtusifolia L.(P<0.05).So the As enrichment of P.vittata was enhanced in interplanting systems,which is beneficial for the As removal from contaminated soil.The study demonstrated that interplant-ing primarily regulates plant As uptake through modifications of rhizosphere physicochemical properties and As bioavailability,especially for water-soluble As that is easily absorbed by plants.In conclusion,the interplant-ing models integrating medicinal crops and P.vittata can achieve the goal of“remediating while producing”in As-contaminated soil.
文摘With ongoing global climate change,drought has become the primary threat constraining food security in China.Traditional assessment frameworks based on administrative boundaries or macro-climatic zoning overlook variation in vulnerability affected by key agronomic practices,such as crop phenology and cropping systems,thereby limiting their accuracy.To address this research gap,this study developed and validated a novel drought risk assessment framework based on agricultural cropping zones(single-,double-,and triple-cropping zones).The framework coupled a Geographical and Temporal Neural Network Weighted Regression(GTNNWR)model for forecasting future crop vegetation dynamics with the Standardized Precipitation Evapotranspiration Index(SPEI)to assess drought risk under historical(2001-2020)and projected future(2021-2100)scenarios.The GTNNWR model achieved R^(2) values ranging from 0.72 to 0.82 and RMSE values between 0.11 and 0.14 for NDVI prediction,significantly outperforming conventional models.Historical drought risk assessment revealed that drought events were most frequent during summer and concentrated in single-cropping and double-cropping zones.Future projections indicate a substantial intensification of drought risk.Under the Shared Socioeconomic Pathway(SSP)126 scenario,drought risk is projected to increase in the triple-cropping zones of the middle and lower reaches of the Yangtze River Plain.Under the SSP245 scenario,the frequency of spring and winter droughts is anticipated to rise markedly.Under the SSP585 scenario,drought intensity is projected to intensify in central–eastern single-cropping zones and southwestern double-cropping zones.This assessment framework based on agricultural cropping zones can precisely identify drought risks and facilitate adaptation in agricultural management,such as optimizing irrigation systems and adjusting crop structures.
基金supported by the National Natural Science Foundation of China(Nos.42107420,U23A20157,and U1910207)Shanxi Province Science Foundation for Young Scholars(No.20210302124363).
文摘Vegetation plays an important role in the environmental transport behavior of organic pollutants,however,the different roles of crops and natural vegetation have been ignored in most previous studies.In this study,we developed the BETR-Urban-Rural-Veg model to quantitatively evaluate the influences of both natural vegetation and crops on the multimedia transport processes of Phenanthrene(PHE)and Benzo(a)pyrene(BaP)in mainland of China.The geographic distribution of polycyclic aromatic hydrocarbon(PAH)emissions and concentrations were consistent,displaying higher levels in northern China while lower levels in southern China.Under seasonal simulations,for both natural vegetation and crops,PAH concentrations in winter and spring were 1.5 to 27-fold higher than in summer and autumn,especially for PHE.Owing to the higher leaf area index(LAI)of natural vegetation and harvesting of crops,the filter and sequestration effect of natural vegetation was stronger than crops,while the seasonal changes of PAH concentrations in crops were more significant than natural vegetation.Temperature,precipitation rates and LAI might have important influences on seasonal concentrations and overall persistence of PAHs.PHE was more sensitive to the impacts of seasonal environmental parameters.Under different landscape scenarios,average annual PAH concentrations in natural vegetation were always a little higher than those in crops,and the overall persistence of BaP was greatly affected increasing by 15.15%-16.47%.This improved model provides a useful tool for environmental management.The results of this study are expected to support land use plans and decision-making in China's mainland.
基金supported by the National Natural Science Foundation of China (32402306)the Agricultural Science and Technology Innovation Program of the Chinese Academy of Agricultural Sciences+1 种基金National Key Research and Development Program of China (2022YFE0203300)the China-Uruguay Joint Laboratory on Soybean Research and Innovation
文摘Plants produce a vast array of specialized metabolites that serve as essential defenses against herbivores and pathogens.However,the capacity to produce these compounds differs substantially among plant species and is frequently diminished during domestication.Advances in synthetic metabolic engineering enable efficient elucidation and engineering of plant specialized metabolic pathways active in crop pest and pathogen resistance.This review summarizes strategies and workflows for selecting defensive metabolic pathways,identifying candidate biosynthetic genes,and rewiring native or introducing heterologous pathways to enhance crop resistance to pests and pathogens.Strategies include weighted gene co-expression network construction,biosynthetic gene cluster scanning,and metabolite genome-wide association studies for pathway discovery,as well as transcriptional reprogramming,enzyme activity optimization,and transporter deployment for pathway engineering.We further discuss challenges in using synthetic metabolic engineering to enhance crop resistance and highlight the potential of artificial intelligence in addressing them.
基金financially supported by the National Key R&D Program of China(2022YFE0113400)the Jiangsu Provincial Fund for Realizing Carbon Emission Peaking and Neutralization,China(BE2022305)+1 种基金the National Natural Science Fundation of China(32102411)the Project funded by China Postdoctoral Science Foundation(2022M722698)。
文摘Global population pressures have necessitated increased focus on protecting and developing resilient plant species that can maintain productivity despite environmental challenges.Environmental degradation,driven by climate change and anthropogenic activities,poses significant threats to global food security through various forms of physical stress.Major environmental constraints affecting agricultural yields worldwide include salinity,water scarcity,nutritional imbalances(encompassing mineral toxicity and deficiencies),and extreme temperatures.Crop yield is influenced by multiple abiotic factors,including agronomic conditions,climatic variables,and soil nutrient availability.Plants develop various survival mechanisms at molecular,cellular,and physiological levels in response to stress.Abiotic stress,whether occurring individually or in combination,significantly impacts crop growth and productivity.For instance,drought stress reduces leaf area,plant height,and overall crop development.Cold stress inhibits plant development and crop efficiency,leading to diminished productivity.Salinity stress not only induces water stress in plants but also negatively affects cytosolic metabolism,cell development,membrane function,and increases reactive oxygen species(ROS)production.Elevated CO_(2)concentrations may enhance global precipitation patterns,potentially resulting in increased rainfall that can adversely affect crop development.Plants under excessive water stress exhibit reduced amylose content but increased crude protein levels.This affects both quality and quantity of crop production by inhibiting seed germination and causing growth impairment through combined effects of elevated osmotic potential and ion toxicity.Plants have evolved various escape-avoidance and tolerance mechanisms in response to abiotic stress,including physiological adaptations and integrated cellular or molecular responses.This review paper examines the impact of abiotic stress on morpho-physiological,biochemical,and molecular activities across various crops.Additionally,it analyzes crop interactions with abiotic stress regarding response and adaptation mechanisms,providing a fundamental framework for species selection and development of stress-tolerant varieties in the future.
基金Supported by the National Natural Science Foundation of China (41101165)~~
文摘[Objective] This study aimed to explore the impact of climate change on wheat cropping by using province-specific historical data during 1996-2007. [Method] We established a panel data econometric model with lagged wheat cropping area and province-specific fixed-effects model to control the unobserved factors. [Result] The results showed that the temperature positively affects wheat cropping area, while precipitation does not have such impact. [Conclusion] The study provided empirical evidence for analysis of the determinants of wheat cropping area in China.
