[Objective] The aim was to research high-yielding cultivation and fertilization technology for Lvhan No.l, a new Chinese rice cultivar, in Angola. [Method] In rainy season of 2012, high-yielding cultivation and fertil...[Objective] The aim was to research high-yielding cultivation and fertilization technology for Lvhan No.l, a new Chinese rice cultivar, in Angola. [Method] In rainy season of 2012, high-yielding cultivation and fertilization technology of Lvhan No.l, a new cultivar of earlier ripe and drought resistant rice, was researched in CATETE farm of Luanda suburb with pot experiment method. [Result] In CATETE farm, Lvhan No.1 rice were directly sown in black clay and the rice can be significantly improved in plant height, grain weight of single plant, biological yield of single plant, ear length, total grain number per ear, number of filled grain per ear and thousand seed weight, as well as economic coefficient and ratio of grain to straw, if applied with base fertilizer made up of DAP （N：P2Os=14：43）, or compound fertilizer of N, P and K （N：P2Os：K^O=15：15：15） and with Duannai fertilizer and ear-grain fertilizer made up of urea. If DAP is taken as base fertilizer, the optimal quantity is 300 kg/hm2. If compound fertilizer of N, P and K is taken as base fertilizer, the optimal quantity is 450 kg/hm2, but urea at 75 kg/hm2 should be applied as Duannai fertilizer and ear- grain fertilizer, respectively, on time. [Conclusion] The research provides technical ref- erences for planting of Chinese rice cultivars in Angola.展开更多
Rationale:This case report describes a couple with recurrent fertilization failure despite undergoing multiple cycles of intracytoplasmic sperm injection(ICSI).The principal clinical concern was suspected oocyte activ...Rationale:This case report describes a couple with recurrent fertilization failure despite undergoing multiple cycles of intracytoplasmic sperm injection(ICSI).The principal clinical concern was suspected oocyte activation deficiency(OAD),in which fertilization is impeded due to the oocyte’s inability to initiate embryogenesis,commonly attributed to inadequate intracellular calcium(Ca^(2+))release following sperm injection.Patient concerns:The couple repeatedly experienced complete or near-complete fertilization failure in previous ICSI cycles,raising suspicion of an underlying oocyte activation defect.Diagnosis:Based on the repeated absence of fertilization post-ICSI and clinical history,a diagnosis of suspected OAD leading to recurrent ICSI fertilization failure was considered.Interventions:Artificial oocyte activation(AOA)using the calcium ionophore A23187 was performed.After ICSI,unfertilized oocytes were exposed to the ionophore to induce Ca^(2+)influx,simulating physiological calcium oscillations essential for oocyte activation.The efficacy of intervention was evaluated through subsequent embryonic development,morphological grading,and chromosomal integrity.Outcomes:Following AOA treatment,successful oocyte activation occurred,resulting in the formation of high-grade embryos with normal developmental progression.Chromosomal analysis revealed no detectable abnormalities,indicating genomic stability.Lessons:Calcium ionophore–mediated AOA may serve as an effective adjunct in cases of recurrent ICSI failure attributed to OAD.This case highlights the importance of individualized therapeutic strategies in assisted reproduction;however,further research is needed to refine protocols,validate broader clinical efficacy,and assess long-term safety,including potential epigenetic risks.展开更多
Cotton producers have substantially reduced their inputs(labor,nutrients,and management)mainly by adopting a shortseason cropping management that is characterized by late sowing,high density,and reduced fertilization ...Cotton producers have substantially reduced their inputs(labor,nutrients,and management)mainly by adopting a shortseason cropping management that is characterized by late sowing,high density,and reduced fertilization with one-time application at the first bloom stage without lint yield reduction.However,it has been hypothesized that one-time fertilization at an earlier growth stage could be a more effective and economic management practice.A two-year field experiment was conducted by applying five fertilizer one-time fertilization at 0(FT1),5(FT2),10(FT3),15(FT4),and 20(FT5)days after the first flower appeared in the field and one three-split fertilizer application taken as the conventional control(FT6),making six treatments altogether.Cotton growth period,biomass accumulation,yield,and its formation were quantified.The results showed that the one-time fertilization did not affect the cotton growth progress as compared to FT6,however,the total crop cycles for FT3–FT5 were 3 days shorter.FT1 produced the highest cotton lint yield(1396 kg ha–1),which was similar to the FT6 but higher than the other treatments,and could be attributed to more bolls per unit area and higher lint percentage.Cotton yield was positively correlated with cotton plant biomass accumulated.FT1 had both the highest average(VT)(193.7 kg ha–1 d–1)and the highest maximum(VM)(220.9 kg ha–1 d–1)rates during the fast biomass accumulation period.These results suggest that one-time fertilizer application at the first flower stage might be an adjustment that is more effective than at first bloom,and allowed for easier decision making for application date due to non counting of plants with flowers is needed.展开更多
[Objectives]To investigate the effects of silicon fertilizer spraying on the growth,yield,quality,and overall benefits of rice cultivation.[Methods]A systematic experiment involving the single-spray multi-promotion te...[Objectives]To investigate the effects of silicon fertilizer spraying on the growth,yield,quality,and overall benefits of rice cultivation.[Methods]A systematic experiment involving the single-spray multi-promotion technology of silicon fertilizer via unmanned aerial vehicles(UAVs)was conducted in three representative rice-growing areas:Ma'an Town,Shuikou Subdistrict,and Luzhou Town.[Results]The spraying of silicon fertilizer markedly enhanced the root development of rice,resulting in increased tiller number,plant height,stem thickness,panicle length,and 1000-grain weight,thereby effectively improving both yield and quality.This treatment exerted six primary beneficial effects:promoting robust and stable seedling growth,enhancing stress resistance,reducing reliance on chemical fertilizers,improving quality,increasing economic benefits,and significantly advancing ecological and social benefits.[Conclusions]The application of silicon fertilizer through spraying is an effective agronomic practice that simultaneously promotes increased rice yield,improved quality,enhanced efficiency,and the sustainable development of resources and the environment.展开更多
Obtaining high-quality embryos is one of the key factors to improve the clinical pregnancy rate of assisted reproductive technologies(ART).So far,the clinical evaluation of embryo quality depends on embryo morphology....Obtaining high-quality embryos is one of the key factors to improve the clinical pregnancy rate of assisted reproductive technologies(ART).So far,the clinical evaluation of embryo quality depends on embryo morphology.However,the clinical pregnancy rate is still low.Therefore,new indicators are needed to further improve the evaluation of embryo quality.Several studies have shown that the decrease of sperm-specific protein actin-like 7A(ACTL7A)leaded to low fertilization rate,poor embryo development,and even infertility.The aim of this study was to study whether the different expression levels of ACTL7A on sperm can be used as a biomarker for predicting embryo quality.In this study,excluding the factors of severe female infertility,a total of 281 sperm samples were collected to compare the ACTL7A expression levels of sperms with high and low effective embryo rates and analyze the correlation between protein levels and in-vitro fertilization(IVF)laboratory outcomes.Our results indicated that the ACTL7A levels were significantly reduced in sperm samples presenting poor embryo quality.Furthermore,the protein levels showed a significant correlation with fertilization outcomes of ART.ACTL7A has the potential to be a biomarker for predicting success rate of fertilization and effective embryo and the possibility of embryo arrest.In conclusion,sperm-specific protein ACTL7A has a strong correlation with IVF laboratory outcomes and plays important roles in fertilization and embryo development.展开更多
Objective:To investigate the incidence of neonatal birth defects in assisted reproductive technology(ART)by in vitro fertilization(IVF)and intracytoplasmic sperm injection(ICSI).Methods:The clinical data of 4229 cases...Objective:To investigate the incidence of neonatal birth defects in assisted reproductive technology(ART)by in vitro fertilization(IVF)and intracytoplasmic sperm injection(ICSI).Methods:The clinical data of 4229 cases of singleton deliver by infertile patients under 35 years old who received IVF/ICSI-ET in our center were analyzed.According to different fertilization methods,they were divided into IVF group(2967 cases)and ICSI group(1262 cases).The general situation of birth,birth defects and the location of defects were compared between the two groups.Results:a total of 38 cases of neonatal birth defects were found,the incidence of birth defects was 0.89%,including 30 cases(1.01%)in IVF group and 8 cases(0.64%)in ICSI group.There was no significant difference in the incidence of birth defects between the two groups(P>0.05).There was also no significant difference in birth weight,gestational age and gender ratio between the two groups(P>0.05).Conclusion:Different fertilization methods in assisted reproductive technology do not increase the incidence of neonatal birth defects.展开更多
This paper summarizes the development process and research status of orchard fertilization technology,introduces many kinds of fertilization methods,such as soil testing and fertilizer recommendation method,and nutrit...This paper summarizes the development process and research status of orchard fertilization technology,introduces many kinds of fertilization methods,such as soil testing and fertilizer recommendation method,and nutrition diagnosis method,probes into the main problems existing in orchard fertilization,and puts forward some suggestions for solving them. The development of orchard fertilization technology in China is also projected.展开更多
Waterborne acrylic emulsions modified with organic siloxanes and aziridine crosslinker were synthesized and applied as coating of controlled release fertilizer. The free films were characterized and the nutrient relea...Waterborne acrylic emulsions modified with organic siloxanes and aziridine crosslinker were synthesized and applied as coating of controlled release fertilizer. The free films were characterized and the nutrient release profiles of the coated fertilizers were determined. The results show that methyl silicone oil and methylsilanolate sodium could not improve water resistance performance and glass transition temperature Tgof coatings, while the firmness is enhanced. Aziridine crosslinker improves the water resistance performance, firmness and Tg. Incorporation of methyl silicone oil and aziridine crosslinker gives an excellent aqueous acrylic emulsion for coated controlled release fertilizer, with the 30-day cumulative nutrient release reduced to 16% and an estimated nutrient release duration over 190 days. Therefore, this waterborne coating is promising to meet the requirements for controlled release of nutrient and environmental protection.展开更多
Integrated water and fertilizer technology has the advantages of saving water,fertilizer and labour,which is widely applied in tomato plantation. Integrated water and fertilizer technology in topdressing and whole pro...Integrated water and fertilizer technology has the advantages of saving water,fertilizer and labour,which is widely applied in tomato plantation. Integrated water and fertilizer technology in topdressing and whole process of big and small tomatoes were studied,and their application effects were contrasted and analyzed,and application advantages and scopes of the two models were concluded.展开更多
Lightweight roof greening is an important way for improving urban ecological environment and has good ecological and social benefits, but the investment is- too-high for the investors. Therefore, it is necessary to im...Lightweight roof greening is an important way for improving urban ecological environment and has good ecological and social benefits, but the investment is- too-high for the investors. Therefore, it is necessary to improve the system of lightweight roof greening. This study introduced a lightweight roof greening mode with low cost, simple construction, rapid formation, good economic benefit and convenient curing.展开更多
In order to validate the control effects of integrated technology of medicine and fertilizer on tobacco bacterial wilt,field experiments were conducted by using youmeili and tetracycline as the test agents.The results...In order to validate the control effects of integrated technology of medicine and fertilizer on tobacco bacterial wilt,field experiments were conducted by using youmeili and tetracycline as the test agents.The results obtained were listed as follows:(1)The incidence rate of bacterial wilt ascended more quickly after July 10 th,the incidence of CK reached 78.30%on July 25 th.(2)The control effect of“youmeili 3 g+tetramycin 200 times liquid”reached 69.47%,significantly higher than other treatments.(3)The output value of“Youmeil 3 g+tetramycin 200 times liquid”served as 1635.66 yuan/667m^2,with the highest economic character in all treatments.In a word,integrated technology of medicine and fertilizer was a feasible approach to control tobacco bacterial wilt.展开更多
The conversion of waste resources into fertilizer represents a crucial strategy for optimizing waste utilization and attaining"carbon peak and neutrality"objectives.This approach not only effectively mitigat...The conversion of waste resources into fertilizer represents a crucial strategy for optimizing waste utilization and attaining"carbon peak and neutrality"objectives.This approach not only effectively mitigates greenhouse gas emissions but also enhances the organic matter content in soil,thereby supporting the advancement of sustainable agriculture.Currently,the principal fertilizer production technologies utilizing solid waste resources encompass hydrothermal fertilizer production,aerobic fermentation,wrapping fertilizer production,micro-storage fertilizer production,and biochemical rapid decomposition.This paper examines the applicability and limitations of these technologies in practical contexts,and anticipates their developmental trends and future prospects.It aims to offer practical guidance and constructive support for the resource utilization of solid waste and the sustainable development of related industries.展开更多
Infertility,defined as the inability to achieve a clinical pregnancy after 1 year of unprotected and regular sexual intercourse,affects approximately 8%–12%of couples worldwide during their childbearing years.Assiste...Infertility,defined as the inability to achieve a clinical pregnancy after 1 year of unprotected and regular sexual intercourse,affects approximately 8%–12%of couples worldwide during their childbearing years.Assisted reproductive technology(ART)offers interventions to facilitate conception in couples with infertility.Since the inception of traditional in vitro fertilization(IVF)in 1978,ART has facilitated the birth of millions of infants.Intracytoplasmic sperm injection(ICSI)is an effective technique for couples ineligible for traditional IVF.Individual female factors,such as age and endometrial thickness,have been shown to affect embryo development during the IVF process,resulting in unfavorable pregnancy outcomes[1-3].However,the influence of environmental and male factors on early reproductive outcomes cannot be ignored.As a novel form of environmental pollution,light at night(LAN)has intensified with the rapid pace of urbanization,potentially leading to reproductive health problems in both women and men.However,to our knowledge,no study has explored the effects of LAN exposure on the early reproductive outcomes of IVF.Furthermore,the normal development of embryos relies on the contributions of both partners,and the influence of male factors on the early reproductive outcomes of IVF should not be overlooked.展开更多
The delayed nitrogen application technology is a crucial method for achieving high yield and efficiency in wheat cultivation.Specifically,more nitrogen is supplied to the middle and late growth stages of wheat by adju...The delayed nitrogen application technology is a crucial method for achieving high yield and efficiency in wheat cultivation.Specifically,more nitrogen is supplied to the middle and late growth stages of wheat by adjusting the application time and proportion of nitrogen fertilizer.This approach helps improve the tiller-bearing percentage and increase the number of grains per ear and the thousand-grain weight,while also reducing nitrogen loss and enhancing fertilizer use efficiency.This paper systematically elaborated on the high-yield and high-efficiency cultivation technology system with delayed nitrogen application for wheat,covering variety selection,soil management,sowing technology,the principle and implementation methods of delayed nitrogen application,integrated water and fertilizer management,field management,and comprehensive pest and disease control.Considering the ecological characteristics of major wheat-growing regions in China,tailored technical solutions were proposed,and operational key points of critical technological steps were introduced in detail.Through scientific variety distribution,precise nitrogen management,and integrated pest control,wheat yield and quality can be enhanced while achieving cost saving,improved efficiency,and ecological environmental protection.This paper provides systematic theoretical guidance and practical references for promoting thedelayed nitrogen application technology in wheat,thereby supporting the sustainable development of China s wheat industry.展开更多
Introduced the technology and application of treating the gasification effluent offertilizer with the physical-chemistry and biochemistry united technology.The technology issimple and viable, and occupies less land.Wh...Introduced the technology and application of treating the gasification effluent offertilizer with the physical-chemistry and biochemistry united technology.The technology issimple and viable, and occupies less land.When the main equipment runs normally, thegasification effluent of fertilizer treated with the united technology reached the requirementby second-degree discharge standard of the'Discharge standard of water pollutants forsynthesize ammonia industry'.展开更多
This paper describes the field tests carried out to evaluate the new Vicon RS-EDW centrifugal fertilizer spreader, to be used in Precision Agriculture. The results of initial dynamic calibration tests showed a signifi...This paper describes the field tests carried out to evaluate the new Vicon RS-EDW centrifugal fertilizer spreader, to be used in Precision Agriculture. The results of initial dynamic calibration tests showed a significant and systematic difference between the application rates of the two discs （about 20%）. This difference had to be corrected by the manufacturer that carried out the necessary changes to the electric actuators. The fertilizer spreader had good distribution homogeneity, considering different working velocities and different positions in the parcel. The pattern distribution curve for 18% super phosphate fertilizer led to an effective working width of 28 meters, with a coefficient of variation of 15%. The longitudinal test, under experimental working conditions led to a machine delay time of 6-7 seconds. The results show an actual fertilization application density between 74%-90% of that determined for each location. These results confirm that the spreader can be used to spread fertilizer differentially in the field.展开更多
[Objectives]The purpose of this study was to provide technical support for high-yield cultivation of major crops in Burundi,thereby increasing local farmers'income and promoting sustainable development of agricult...[Objectives]The purpose of this study was to provide technical support for high-yield cultivation of major crops in Burundi,thereby increasing local farmers'income and promoting sustainable development of agriculture in Burundi.[Methods]In the IMBO and MOSO test stations of the Burundi Academy of Agricultural Sciences and the Burundi Fruit and Vegetable Extension and Service Center,soil testing and formulated fertilization test and demonstration was carried out in rice,maize and cabbage.The test set up three treatments,soil testing and formulated fertilization(STFF),local routine fertilization(RF)and non-fertilization(CK)to investigate the effects of soil testing and formulated fertilization on the yield and economic benefit of the crops.[Results]In the plot test,the yield and net economic benefit of rice,maize and cabbage were both highest in the STFF treatment.Compared with those in the RF treatment,the yield of rice,maize and cabbage increased by 19.0%,25.7%and 33.0%,respectively,and the net economic benefit increased by 4292,2837 and 8232 yuan/ha,respectively.In the field test,the yield and net economic benefit of rice,maize and cabbage were also both highest in the STFF treatment.The yield increased by 18.1%,24.3%and 25.9%,respectively,and the net economic benefit increased by 4142,2881 and 8665 yuan/ha,respectively compared with those in the RF treatment.[Conclusions]Soil testing and formulated fertilization not only increased rice,maize and cabbage yield per unit area,but also increased farmers'income in Burundi.It is one of the important technical measures to promote the increase of agricultural production and income in Burundi.展开更多
The technological change as an exogenous variable is introduced into the RCK model with endogenous fertility in this paper. It is proved that the model has at least a nonzero steady state and the nonzero steady state ...The technological change as an exogenous variable is introduced into the RCK model with endogenous fertility in this paper. It is proved that the model has at least a nonzero steady state and the nonzero steady state is unique when the parameters satisfies some conditions. By phrase protrait analysis, the unique nonzero steady state is saddle and the economy has a unique optimal growth path. The results obtained implies that the relationship between the technological change and population growth rate determinated by the economic structure and the parental ethies. For the economy in which the parents is selfish, promoting the technological change rate decreases the fertility at the steady state. On the other hand, for the economy in which the parents is less selfish, the fertility increases as the technological change rate increases.展开更多
The selection of the most motile and functionally competent sperm is an essential basis for in vitro fertilization(IVF)and normal embryonic development.Widely adopted clinical approaches for sperm sample processing in...The selection of the most motile and functionally competent sperm is an essential basis for in vitro fertilization(IVF)and normal embryonic development.Widely adopted clinical approaches for sperm sample processing intensely rely on centrifugation and wash steps that may induce mechanical damage and oxidative stress to sperm.Although a few microfluidic sperm sorting devices may avoid these adverse effects by exploiting intrinsic guidance mechanisms of sperm swimming,none of these approaches have been fully validated by clinical-grade assessment criteria.In this study,a microfluidic sperm sorting device that enables the selection of highly motile and functional sperm via their intrinsic thermotaxis is presented.Bioinspired by the temperature microenvironment in the fallopian tube during natural sperm selection,a microfluidic device with controllable temperature gradients along the sperm separation channel was designed and fabricated.This study investigated the optimal temperature conditions for human sperm selection and fully characterized thermotaxis-selected sperm with 45 human sperm samples.Results indicated that a temperature range of 35–36.5℃along the separation channel significantly improves human sperm motility rate((85.25±6.28)%vs.(60.72±1.37)%;P=0.0484),increases normal sperm morphology rate((16.42±1.43)%vs.(12.55±0.88)%;P<0.0001),and reduces DNA fragmentation((7.44±0.79)%vs.(10.36±0.72)%;P=0.0485)compared to the nonthermotaxis group.Sperm thermotaxis is species-specific,and selected mouse sperm displayed the highest motility in response to a temperature range of 36–37.5℃ along the separation channel.Furthermore,IVF experiments indicated that the selected sperm permitted an increased fertilization rate and improved embryonic development from zygote to blastocyst.This microfluidic thermotaxic selection approach will be translated into clinical practice to improve the IVF success rate for patients with oligozoospermia and asthenozoospermia.展开更多
Objective: To assess the secondary sex ratio (SSR) of assisted reproduction technology babies within a fertility clinic in Melbourne, Australia. Methods: A retrospective cohort study was conducted on 3369 babies who w...Objective: To assess the secondary sex ratio (SSR) of assisted reproduction technology babies within a fertility clinic in Melbourne, Australia. Methods: A retrospective cohort study was conducted on 3369 babies who were born following single embryo transfer between 2011 and 2016. Variables examined included embryo creation date, maternal and paternal ages, maternal body mass index (BMI), type of infertility, sperm parameters, fertilization method, type of embryo and stage of transfer. Multivariate regression analysis was performed on the data set using STRATA V9.2. Results: More males were found to be born to embryos created in summer (adjusted odds ratio=1.46, 95% confidence interval: 1.08-1.95;P=0.01). Lower BMI of mother (≤30 kg/m 2) and younger age of parents (≤35 years) were associated with an increase in SSR (50.1% vs. 47.1%;50.6% vs. 48.8%;50.0% vs. 48.9%) respectively. Decreased SSR value was associated with primary subfertility, using in-vitro fertilization procedure and fresh embryo compared to those with secondary subfertility, using intracytoplasmic sperm injection procedure and thawed embryo (49.3% vs. 50.6%;47.1% vs. 50.8%;49.4% vs. 50.1%) respectively. Conclusions: The fertilization methods, type of embryo, stage of embryo transfer, parameters of the sperm and status of subfertility do not significantly affect the SSR. SSR is affected by the seasonality, maternal age, and BMI.展开更多
基金Supported by International Cooperation Program of Anhui Provincial Science&Technology Department(11030603031)~~
文摘[Objective] The aim was to research high-yielding cultivation and fertilization technology for Lvhan No.l, a new Chinese rice cultivar, in Angola. [Method] In rainy season of 2012, high-yielding cultivation and fertilization technology of Lvhan No.l, a new cultivar of earlier ripe and drought resistant rice, was researched in CATETE farm of Luanda suburb with pot experiment method. [Result] In CATETE farm, Lvhan No.1 rice were directly sown in black clay and the rice can be significantly improved in plant height, grain weight of single plant, biological yield of single plant, ear length, total grain number per ear, number of filled grain per ear and thousand seed weight, as well as economic coefficient and ratio of grain to straw, if applied with base fertilizer made up of DAP （N：P2Os=14：43）, or compound fertilizer of N, P and K （N：P2Os：K^O=15：15：15） and with Duannai fertilizer and ear-grain fertilizer made up of urea. If DAP is taken as base fertilizer, the optimal quantity is 300 kg/hm2. If compound fertilizer of N, P and K is taken as base fertilizer, the optimal quantity is 450 kg/hm2, but urea at 75 kg/hm2 should be applied as Duannai fertilizer and ear- grain fertilizer, respectively, on time. [Conclusion] The research provides technical ref- erences for planting of Chinese rice cultivars in Angola.
文摘Rationale:This case report describes a couple with recurrent fertilization failure despite undergoing multiple cycles of intracytoplasmic sperm injection(ICSI).The principal clinical concern was suspected oocyte activation deficiency(OAD),in which fertilization is impeded due to the oocyte’s inability to initiate embryogenesis,commonly attributed to inadequate intracellular calcium(Ca^(2+))release following sperm injection.Patient concerns:The couple repeatedly experienced complete or near-complete fertilization failure in previous ICSI cycles,raising suspicion of an underlying oocyte activation defect.Diagnosis:Based on the repeated absence of fertilization post-ICSI and clinical history,a diagnosis of suspected OAD leading to recurrent ICSI fertilization failure was considered.Interventions:Artificial oocyte activation(AOA)using the calcium ionophore A23187 was performed.After ICSI,unfertilized oocytes were exposed to the ionophore to induce Ca^(2+)influx,simulating physiological calcium oscillations essential for oocyte activation.The efficacy of intervention was evaluated through subsequent embryonic development,morphological grading,and chromosomal integrity.Outcomes:Following AOA treatment,successful oocyte activation occurred,resulting in the formation of high-grade embryos with normal developmental progression.Chromosomal analysis revealed no detectable abnormalities,indicating genomic stability.Lessons:Calcium ionophore–mediated AOA may serve as an effective adjunct in cases of recurrent ICSI failure attributed to OAD.This case highlights the importance of individualized therapeutic strategies in assisted reproduction;however,further research is needed to refine protocols,validate broader clinical efficacy,and assess long-term safety,including potential epigenetic risks.
基金supported by the National Natural Science Foundation of China (31271665)the Pairing Program of Key Laboratory of Oasis Ecology Agriculture, Xinjiang Production and Construction Group with Eminent Scholars in Elite Universities, China (201601)
文摘Cotton producers have substantially reduced their inputs(labor,nutrients,and management)mainly by adopting a shortseason cropping management that is characterized by late sowing,high density,and reduced fertilization with one-time application at the first bloom stage without lint yield reduction.However,it has been hypothesized that one-time fertilization at an earlier growth stage could be a more effective and economic management practice.A two-year field experiment was conducted by applying five fertilizer one-time fertilization at 0(FT1),5(FT2),10(FT3),15(FT4),and 20(FT5)days after the first flower appeared in the field and one three-split fertilizer application taken as the conventional control(FT6),making six treatments altogether.Cotton growth period,biomass accumulation,yield,and its formation were quantified.The results showed that the one-time fertilization did not affect the cotton growth progress as compared to FT6,however,the total crop cycles for FT3–FT5 were 3 days shorter.FT1 produced the highest cotton lint yield(1396 kg ha–1),which was similar to the FT6 but higher than the other treatments,and could be attributed to more bolls per unit area and higher lint percentage.Cotton yield was positively correlated with cotton plant biomass accumulated.FT1 had both the highest average(VT)(193.7 kg ha–1 d–1)and the highest maximum(VM)(220.9 kg ha–1 d–1)rates during the fast biomass accumulation period.These results suggest that one-time fertilizer application at the first flower stage might be an adjustment that is more effective than at first bloom,and allowed for easier decision making for application date due to non counting of plants with flowers is needed.
基金Supported by Huizhou Municipal Stable Grain and Oil Production Award and Subsidy Project"2025 Single-spray Multi-Promotion Project of Silicon Fertilizer on Rice Crops Using UAVs of Huicheng District".
文摘[Objectives]To investigate the effects of silicon fertilizer spraying on the growth,yield,quality,and overall benefits of rice cultivation.[Methods]A systematic experiment involving the single-spray multi-promotion technology of silicon fertilizer via unmanned aerial vehicles(UAVs)was conducted in three representative rice-growing areas:Ma'an Town,Shuikou Subdistrict,and Luzhou Town.[Results]The spraying of silicon fertilizer markedly enhanced the root development of rice,resulting in increased tiller number,plant height,stem thickness,panicle length,and 1000-grain weight,thereby effectively improving both yield and quality.This treatment exerted six primary beneficial effects:promoting robust and stable seedling growth,enhancing stress resistance,reducing reliance on chemical fertilizers,improving quality,increasing economic benefits,and significantly advancing ecological and social benefits.[Conclusions]The application of silicon fertilizer through spraying is an effective agronomic practice that simultaneously promotes increased rice yield,improved quality,enhanced efficiency,and the sustainable development of resources and the environment.
基金supported by the Foundation of Shanghai Municipal Health Commission(No.202140340)National Natural Science Foundation of China(No.82171603)Foundation of Science and Technology Commission of Shanghai Municipality(No.17JC1400902,No.20Z21900402).
文摘Obtaining high-quality embryos is one of the key factors to improve the clinical pregnancy rate of assisted reproductive technologies(ART).So far,the clinical evaluation of embryo quality depends on embryo morphology.However,the clinical pregnancy rate is still low.Therefore,new indicators are needed to further improve the evaluation of embryo quality.Several studies have shown that the decrease of sperm-specific protein actin-like 7A(ACTL7A)leaded to low fertilization rate,poor embryo development,and even infertility.The aim of this study was to study whether the different expression levels of ACTL7A on sperm can be used as a biomarker for predicting embryo quality.In this study,excluding the factors of severe female infertility,a total of 281 sperm samples were collected to compare the ACTL7A expression levels of sperms with high and low effective embryo rates and analyze the correlation between protein levels and in-vitro fertilization(IVF)laboratory outcomes.Our results indicated that the ACTL7A levels were significantly reduced in sperm samples presenting poor embryo quality.Furthermore,the protein levels showed a significant correlation with fertilization outcomes of ART.ACTL7A has the potential to be a biomarker for predicting success rate of fertilization and effective embryo and the possibility of embryo arrest.In conclusion,sperm-specific protein ACTL7A has a strong correlation with IVF laboratory outcomes and plays important roles in fertilization and embryo development.
基金Major Science and Technology Project of Hainan Province(No.ZDKJ2017007)Key Research and Development Project of Hainan Provincial Science and Technology Department(No.ZDYF2019158)Scientific Research Project of Health and Family Planning Industry in Hainan Province(No.19A200124)。
文摘Objective:To investigate the incidence of neonatal birth defects in assisted reproductive technology(ART)by in vitro fertilization(IVF)and intracytoplasmic sperm injection(ICSI).Methods:The clinical data of 4229 cases of singleton deliver by infertile patients under 35 years old who received IVF/ICSI-ET in our center were analyzed.According to different fertilization methods,they were divided into IVF group(2967 cases)and ICSI group(1262 cases).The general situation of birth,birth defects and the location of defects were compared between the two groups.Results:a total of 38 cases of neonatal birth defects were found,the incidence of birth defects was 0.89%,including 30 cases(1.01%)in IVF group and 8 cases(0.64%)in ICSI group.There was no significant difference in the incidence of birth defects between the two groups(P>0.05).There was also no significant difference in birth weight,gestational age and gender ratio between the two groups(P>0.05).Conclusion:Different fertilization methods in assisted reproductive technology do not increase the incidence of neonatal birth defects.
基金Supported by Jiangxi Social Science Planning Project:Research on the Activation of Traditional Villages in Jiangxi Province from the Perspective of Cultural Conservation:A Case Study of Fuhe River Basin(Grant No.17BJ16).
文摘This paper summarizes the development process and research status of orchard fertilization technology,introduces many kinds of fertilization methods,such as soil testing and fertilizer recommendation method,and nutrition diagnosis method,probes into the main problems existing in orchard fertilization,and puts forward some suggestions for solving them. The development of orchard fertilization technology in China is also projected.
基金Supported by the National 12th Five-Year Science and Technology Supporting Program(2011BAD11B01)the Research & Development Projects Cooperation Project of Chinese Academy of Sciences(YDJDBNJ-2012-023)
文摘Waterborne acrylic emulsions modified with organic siloxanes and aziridine crosslinker were synthesized and applied as coating of controlled release fertilizer. The free films were characterized and the nutrient release profiles of the coated fertilizers were determined. The results show that methyl silicone oil and methylsilanolate sodium could not improve water resistance performance and glass transition temperature Tgof coatings, while the firmness is enhanced. Aziridine crosslinker improves the water resistance performance, firmness and Tg. Incorporation of methyl silicone oil and aziridine crosslinker gives an excellent aqueous acrylic emulsion for coated controlled release fertilizer, with the 30-day cumulative nutrient release reduced to 16% and an estimated nutrient release duration over 190 days. Therefore, this waterborne coating is promising to meet the requirements for controlled release of nutrient and environmental protection.
基金Supported by "Sannongliufang" Technology Collaboration Program in Zhejiang Province in 2014
文摘Integrated water and fertilizer technology has the advantages of saving water,fertilizer and labour,which is widely applied in tomato plantation. Integrated water and fertilizer technology in topdressing and whole process of big and small tomatoes were studied,and their application effects were contrasted and analyzed,and application advantages and scopes of the two models were concluded.
基金Supported by Science and Technology Planning Project of Guangdong Province,China(No.2015B090904008)Soft Science Planning Project of Guangdong Province(2014B090903015)Ecological Environment Construction and Protection(Techand)Engineering and Technological Research Center(YKHZZ[2013]1589)~~
文摘Lightweight roof greening is an important way for improving urban ecological environment and has good ecological and social benefits, but the investment is- too-high for the investors. Therefore, it is necessary to improve the system of lightweight roof greening. This study introduced a lightweight roof greening mode with low cost, simple construction, rapid formation, good economic benefit and convenient curing.
基金Supported by Science and Technology Project of Yunnan Tobacco Company(2015YN07,2017YN26)~~
文摘In order to validate the control effects of integrated technology of medicine and fertilizer on tobacco bacterial wilt,field experiments were conducted by using youmeili and tetracycline as the test agents.The results obtained were listed as follows:(1)The incidence rate of bacterial wilt ascended more quickly after July 10 th,the incidence of CK reached 78.30%on July 25 th.(2)The control effect of“youmeili 3 g+tetramycin 200 times liquid”reached 69.47%,significantly higher than other treatments.(3)The output value of“Youmeil 3 g+tetramycin 200 times liquid”served as 1635.66 yuan/667m^2,with the highest economic character in all treatments.In a word,integrated technology of medicine and fertilizer was a feasible approach to control tobacco bacterial wilt.
基金Supported by National Undergraduate Training Programs for Innovation and Entrepreneurship(X202510580088)Special Project for Promoting the Coordinated Development of Urban and Rural Areas and Regions by Introducing Scientific and Technological Achievements of Guangdong Province into Counties and Towns(2025B0202010051)Project of High-quality Development in Hundred Counties,Thousands Towns and Ten Thousand Villages of Guangdong Provincial Department of Science and Technology:Key Dispatch Project for Rural Science and Technology Commissioners(KTP20240704).
文摘The conversion of waste resources into fertilizer represents a crucial strategy for optimizing waste utilization and attaining"carbon peak and neutrality"objectives.This approach not only effectively mitigates greenhouse gas emissions but also enhances the organic matter content in soil,thereby supporting the advancement of sustainable agriculture.Currently,the principal fertilizer production technologies utilizing solid waste resources encompass hydrothermal fertilizer production,aerobic fermentation,wrapping fertilizer production,micro-storage fertilizer production,and biochemical rapid decomposition.This paper examines the applicability and limitations of these technologies in practical contexts,and anticipates their developmental trends and future prospects.It aims to offer practical guidance and constructive support for the resource utilization of solid waste and the sustainable development of related industries.
基金supported by grants from the National Key Research and Development Program of China(No.2018YFC1004201)National Natural Science Foundation of China(No.82473642)+3 种基金Research Funds of the Center for Big Data and Population Health of IHM(No.JKS2023017)Natural Science Foundation of Anhui Province(No.2408085QH278)Research Fund of the Anhui Institute of Translational Medicine(No.2022zhyx-C05)Anhui Medical University National Undergraduate Innovation and Entrepreneurship Training Program(No.S202410366070).
文摘Infertility,defined as the inability to achieve a clinical pregnancy after 1 year of unprotected and regular sexual intercourse,affects approximately 8%–12%of couples worldwide during their childbearing years.Assisted reproductive technology(ART)offers interventions to facilitate conception in couples with infertility.Since the inception of traditional in vitro fertilization(IVF)in 1978,ART has facilitated the birth of millions of infants.Intracytoplasmic sperm injection(ICSI)is an effective technique for couples ineligible for traditional IVF.Individual female factors,such as age and endometrial thickness,have been shown to affect embryo development during the IVF process,resulting in unfavorable pregnancy outcomes[1-3].However,the influence of environmental and male factors on early reproductive outcomes cannot be ignored.As a novel form of environmental pollution,light at night(LAN)has intensified with the rapid pace of urbanization,potentially leading to reproductive health problems in both women and men.However,to our knowledge,no study has explored the effects of LAN exposure on the early reproductive outcomes of IVF.Furthermore,the normal development of embryos relies on the contributions of both partners,and the influence of male factors on the early reproductive outcomes of IVF should not be overlooked.
基金Supported by The Key Science and Technology Project of Shangqiu City(2024056).
文摘The delayed nitrogen application technology is a crucial method for achieving high yield and efficiency in wheat cultivation.Specifically,more nitrogen is supplied to the middle and late growth stages of wheat by adjusting the application time and proportion of nitrogen fertilizer.This approach helps improve the tiller-bearing percentage and increase the number of grains per ear and the thousand-grain weight,while also reducing nitrogen loss and enhancing fertilizer use efficiency.This paper systematically elaborated on the high-yield and high-efficiency cultivation technology system with delayed nitrogen application for wheat,covering variety selection,soil management,sowing technology,the principle and implementation methods of delayed nitrogen application,integrated water and fertilizer management,field management,and comprehensive pest and disease control.Considering the ecological characteristics of major wheat-growing regions in China,tailored technical solutions were proposed,and operational key points of critical technological steps were introduced in detail.Through scientific variety distribution,precise nitrogen management,and integrated pest control,wheat yield and quality can be enhanced while achieving cost saving,improved efficiency,and ecological environmental protection.This paper provides systematic theoretical guidance and practical references for promoting thedelayed nitrogen application technology in wheat,thereby supporting the sustainable development of China s wheat industry.
文摘Introduced the technology and application of treating the gasification effluent offertilizer with the physical-chemistry and biochemistry united technology.The technology issimple and viable, and occupies less land.When the main equipment runs normally, thegasification effluent of fertilizer treated with the united technology reached the requirementby second-degree discharge standard of the'Discharge standard of water pollutants forsynthesize ammonia industry'.
文摘This paper describes the field tests carried out to evaluate the new Vicon RS-EDW centrifugal fertilizer spreader, to be used in Precision Agriculture. The results of initial dynamic calibration tests showed a significant and systematic difference between the application rates of the two discs （about 20%）. This difference had to be corrected by the manufacturer that carried out the necessary changes to the electric actuators. The fertilizer spreader had good distribution homogeneity, considering different working velocities and different positions in the parcel. The pattern distribution curve for 18% super phosphate fertilizer led to an effective working width of 28 meters, with a coefficient of variation of 15%. The longitudinal test, under experimental working conditions led to a machine delay time of 6-7 seconds. The results show an actual fertilization application density between 74%-90% of that determined for each location. These results confirm that the spreader can be used to spread fertilizer differentially in the field.
基金Special Scientific and Technological Assistance Program of Ministry of Science and Technology of the People's Republic of China to Developing Countries(Demonstration and Popularization of Key Technologies for Increasing Grain Yield in Africa)Scientific Research and Technology Development Plan Project of Guangxi Zhuang Autonomous Region,China(Gui Ke He 1346009-4,Gui Ke He 14125007-2-7).
文摘[Objectives]The purpose of this study was to provide technical support for high-yield cultivation of major crops in Burundi,thereby increasing local farmers'income and promoting sustainable development of agriculture in Burundi.[Methods]In the IMBO and MOSO test stations of the Burundi Academy of Agricultural Sciences and the Burundi Fruit and Vegetable Extension and Service Center,soil testing and formulated fertilization test and demonstration was carried out in rice,maize and cabbage.The test set up three treatments,soil testing and formulated fertilization(STFF),local routine fertilization(RF)and non-fertilization(CK)to investigate the effects of soil testing and formulated fertilization on the yield and economic benefit of the crops.[Results]In the plot test,the yield and net economic benefit of rice,maize and cabbage were both highest in the STFF treatment.Compared with those in the RF treatment,the yield of rice,maize and cabbage increased by 19.0%,25.7%and 33.0%,respectively,and the net economic benefit increased by 4292,2837 and 8232 yuan/ha,respectively.In the field test,the yield and net economic benefit of rice,maize and cabbage were also both highest in the STFF treatment.The yield increased by 18.1%,24.3%and 25.9%,respectively,and the net economic benefit increased by 4142,2881 and 8665 yuan/ha,respectively compared with those in the RF treatment.[Conclusions]Soil testing and formulated fertilization not only increased rice,maize and cabbage yield per unit area,but also increased farmers'income in Burundi.It is one of the important technical measures to promote the increase of agricultural production and income in Burundi.
基金Supported by the National Natural Science Foundation of China!(79970104)
文摘The technological change as an exogenous variable is introduced into the RCK model with endogenous fertility in this paper. It is proved that the model has at least a nonzero steady state and the nonzero steady state is unique when the parameters satisfies some conditions. By phrase protrait analysis, the unique nonzero steady state is saddle and the economy has a unique optimal growth path. The results obtained implies that the relationship between the technological change and population growth rate determinated by the economic structure and the parental ethies. For the economy in which the parents is selfish, promoting the technological change rate decreases the fertility at the steady state. On the other hand, for the economy in which the parents is less selfish, the fertility increases as the technological change rate increases.
基金supported by the Key Research and Development Project of Hubei Province,China(No.2021BCA111)。
文摘The selection of the most motile and functionally competent sperm is an essential basis for in vitro fertilization(IVF)and normal embryonic development.Widely adopted clinical approaches for sperm sample processing intensely rely on centrifugation and wash steps that may induce mechanical damage and oxidative stress to sperm.Although a few microfluidic sperm sorting devices may avoid these adverse effects by exploiting intrinsic guidance mechanisms of sperm swimming,none of these approaches have been fully validated by clinical-grade assessment criteria.In this study,a microfluidic sperm sorting device that enables the selection of highly motile and functional sperm via their intrinsic thermotaxis is presented.Bioinspired by the temperature microenvironment in the fallopian tube during natural sperm selection,a microfluidic device with controllable temperature gradients along the sperm separation channel was designed and fabricated.This study investigated the optimal temperature conditions for human sperm selection and fully characterized thermotaxis-selected sperm with 45 human sperm samples.Results indicated that a temperature range of 35–36.5℃along the separation channel significantly improves human sperm motility rate((85.25±6.28)%vs.(60.72±1.37)%;P=0.0484),increases normal sperm morphology rate((16.42±1.43)%vs.(12.55±0.88)%;P<0.0001),and reduces DNA fragmentation((7.44±0.79)%vs.(10.36±0.72)%;P=0.0485)compared to the nonthermotaxis group.Sperm thermotaxis is species-specific,and selected mouse sperm displayed the highest motility in response to a temperature range of 36–37.5℃ along the separation channel.Furthermore,IVF experiments indicated that the selected sperm permitted an increased fertilization rate and improved embryonic development from zygote to blastocyst.This microfluidic thermotaxic selection approach will be translated into clinical practice to improve the IVF success rate for patients with oligozoospermia and asthenozoospermia.
文摘Objective: To assess the secondary sex ratio (SSR) of assisted reproduction technology babies within a fertility clinic in Melbourne, Australia. Methods: A retrospective cohort study was conducted on 3369 babies who were born following single embryo transfer between 2011 and 2016. Variables examined included embryo creation date, maternal and paternal ages, maternal body mass index (BMI), type of infertility, sperm parameters, fertilization method, type of embryo and stage of transfer. Multivariate regression analysis was performed on the data set using STRATA V9.2. Results: More males were found to be born to embryos created in summer (adjusted odds ratio=1.46, 95% confidence interval: 1.08-1.95;P=0.01). Lower BMI of mother (≤30 kg/m 2) and younger age of parents (≤35 years) were associated with an increase in SSR (50.1% vs. 47.1%;50.6% vs. 48.8%;50.0% vs. 48.9%) respectively. Decreased SSR value was associated with primary subfertility, using in-vitro fertilization procedure and fresh embryo compared to those with secondary subfertility, using intracytoplasmic sperm injection procedure and thawed embryo (49.3% vs. 50.6%;47.1% vs. 50.8%;49.4% vs. 50.1%) respectively. Conclusions: The fertilization methods, type of embryo, stage of embryo transfer, parameters of the sperm and status of subfertility do not significantly affect the SSR. SSR is affected by the seasonality, maternal age, and BMI.
