Guazhou County of Gansu Province is a typical ecological fragile area lying in the transition area of desert and oasis.The development of its agricultural economy is highly dependent on natural resources and environme...Guazhou County of Gansu Province is a typical ecological fragile area lying in the transition area of desert and oasis.The development of its agricultural economy is highly dependent on natural resources and environment.Contradiction of resources characterized agriculture and the fragile ecological environment has become one of the main barriers to log the impact of local agriculture to achieve sustainable development.Aiming at fragile ecological environment and limiting factors of agricultural sustainable development,thoughts and countermeasures of realizing agricultural sustainable development have been proposed.展开更多
[Objective] The aim was to research influential factors of water productivity of maize in oasis in arid areas. [Method] In middle reach of Heihe River in Linze County of Zhangye City, maize, a major crop in irrigated ...[Objective] The aim was to research influential factors of water productivity of maize in oasis in arid areas. [Method] In middle reach of Heihe River in Linze County of Zhangye City, maize, a major crop in irrigated area in the oasis, was studied and nine influential factors were chosen through grey relation analysis. [Result] According to grey relation analysis, top five factors influencing water produc- tivity of maize during 1995-2009 were as follows： applied quantity of chemical fertil- izers〉labour input〉seeds〉mulch amount〉pesticide amount, which indicated that controllable factors, instead of uncontrollable ones, dominate in influence of water productivity of maize in oasis in arid areas. [Conclusion] With water resource limited, investment of controllable factors in high-efficient agricultural production should be the major strategy to improve water productivity of maize in oasis of arid areas.展开更多
Minqin Oasis is located in the lower reaches of the Shiyanghe River Basin, northeast of the Heixi Corridor, at the middle of the Silk Road. Because of the its existence, Badain Jaran Desert and Tengger Desert cannot c...Minqin Oasis is located in the lower reaches of the Shiyanghe River Basin, northeast of the Heixi Corridor, at the middle of the Silk Road. Because of the its existence, Badain Jaran Desert and Tengger Desert cannot converge and develop in the south. It has always been an important green barrier to guarantee the eco-security of Hexi Corridor and the Silk Road for thousands of years. But in recent decades, Minqin Oasis is becoming smaller and the desert is becoming larger. Many people, especially the governmental officials in the lower reaches think that the upper and middle reaches have robbed the lower reaches of water resources, and caused insufficient water usage and the deteriorated eco-environment, in the lower reaches, However, the governmental officials in the upper and middle reaches claim that the whole river basin should take the upper and middle reaches as the key regions to develop economy. To address the above argument, we analyze the reasons why Minqin Oasis is disappearing, and find that there are two main factors. One is the quick development of population and economy in the upper and middle reaches; the other is the rapid development of population and economy in the lower reaches. The two factors both have great effect on the water utilization for eco-environment in the lower reaches. So Minqin Oasis is disappearing not only because of the upper and middle reaches but also because of the growth of population and economy itself. The lower reaches should not completely blame the upper and middle reaches. The upper and middle reaches should also pay more attention to the eco-environment in the lower reaches. The whole river basin should develop a harmonious and sustainable relationship among the upper, middle and lower reaches.展开更多
The periphery of oasis plays an important role in mutual transformation between desert and oasis. Vegetation is an important part in the ecosystem and it is an important index indicating certain landscape, Based on se...The periphery of oasis plays an important role in mutual transformation between desert and oasis. Vegetation is an important part in the ecosystem and it is an important index indicating certain landscape, Based on several times field investigation, this paper attaches importance to the feasible measures for vegetation restoration according to the current condition of study area - Qira County of Xinjiang Uygur Autonomous Region, In order to improve die local ecological environment, people lived in Qira County should work bard to protect their homehind and reduce the degree of sandstorm, More protection forest should be established along with other ecological techniques. Results derived from this study contribute largely to the ecological environmental protection of oasis.展开更多
Carbon fluxes are essential indicators assessing vegetation carbon cycle functions.However,the extent and mechanisms by which climate change and human activities influence the spatiotemporal dynamics of carbon fluxes ...Carbon fluxes are essential indicators assessing vegetation carbon cycle functions.However,the extent and mechanisms by which climate change and human activities influence the spatiotemporal dynamics of carbon fluxes in arid oasis and non-oasis area remains unclear.Here,we assessed and predicted the future effects of climate change and human activities on carbon fluxes in the Hexi Corridor.The results showed that the annual average gross primary productivity(GPP),net ecosystem productivity(NEP),and ecosystem respiration(Reco)in the Hexi Corridor oasis increased by 263.91 g C·m^(-2)·yr^(-1),118.45 g C·m^(-2)·yr^(-1)and 122.46 g C·m^(-2)·yr^(-1),respectively,due to the expansion of the oasis area by 3424.84 km^(2) caused by human activities from 2000 to 2022.Both oasis and non-oasis arid ecosystems in the Hexi Corridor acted as carbon sinks.Compared to the non-oasis area,the carbon fluxes contributions of oasis area increased,ranging from 10.21%to 13.99%for GPP,8.50%to11.68%for NEP,and 13.34%to 17.13%for Reco.The contribution of the carbon flux from the oasis expansion area to the total carbon flux change in the Hexi Corridor was 30.96%(7.09 Tg C yr^(-1))for GPP,29.57%(3.39 Tg C yr^(-1))for NEP and 32.40%(3.58 Tg C yr^(-1))for Reco.The changes in carbon fluxes in the oasis area were mainly attributed to human activities(oasis expansion)and temperature,whereas non-oasis area was mainly due to climate factors.Moreover,the future increasing trends were observed for GPP(64.99%),NEP(66.29%)and Reco(82.08%)in the Hexi Corridor.This study provides new insights into the regulatory mechanisms of carbon cycle in the arid oasis and non-oasis area.展开更多
Counties are emerging as increasingly important units of China’s national economy.As of the end of 2023,China has 59 counties with annual GDP exceeding 100 billion yuan($14 billion),and their combined GDP reached 9.6...Counties are emerging as increasingly important units of China’s national economy.As of the end of 2023,China has 59 counties with annual GDP exceeding 100 billion yuan($14 billion),and their combined GDP reached 9.6 trillion yuan($1.3 trillion),accounting for 7.6 percent of the country’s total.展开更多
[Objectives]To explore the spatiotemporal evolution and development drivers for Taobao villages in Cao County.[Methods]This paper employs GIS spatial analysis methods such as standard deviation ellipse and kernel dens...[Objectives]To explore the spatiotemporal evolution and development drivers for Taobao villages in Cao County.[Methods]This paper employs GIS spatial analysis methods such as standard deviation ellipse and kernel density to characterize the spatial distribution,agglomeration,and correlation features of Taobao villages in Cao County at the township scale.Additionally,geographic detectors are used to explore influencing factors.[Results](i)The number of Taobao villages in Cao County exhibits phased characteristics,progressing through initial,rapid expansion,and stable development stages.(ii)Taobao villages are unevenly distributed,with significant clustering features,primarily concentrated in the southeastern part of the county.In recent years,they have expanded toward the central and northwestern regions,potentially forming a"multi-core"spatial pattern in the future.(iii)The number of garment industries and e-commerce industrial parks consistently remains the primary factor influencing the spatial distribution of Taobao villages.After 2020,the number of wood processing industries and specialty agricultural product processing industries also exerted considerable influence.The number of logistics parks began to have an impact after 2018,albeit a weak one.Other factors had minimal influence on the differentiation of Taobao villages.[Conclusions]The spatiotemporal evolution exhibited diffusion along the"northwest-southeast"axis,with strengthened regional clustering.Government policies and industries significantly influenced the differentiation of Taobao villages,with varying primary factors across different periods.展开更多
This study focuses on the Gynostemma pentaphyllum industry in Pingli County, Shaanxi Province. Through literature analysis and data statistics, it systematically reviews the current status of cultivation, processing, ...This study focuses on the Gynostemma pentaphyllum industry in Pingli County, Shaanxi Province. Through literature analysis and data statistics, it systematically reviews the current status of cultivation, processing, sales, and research & development of G. pentaphyllum , identifies core industrial development issues, and proposes sustainable development strategies based on policy, market, and technological trends. The research reveals that Pingli County has established a large-scale cultivation and primary processing system for G. pentaphyllum , but faces challenges including insufficient development of high value-added products and weak brand influence. Future industrial upgrading should be achieved through technological innovation, brand building, and industrial chain extension.展开更多
Siwa Oasis,one of Egypts most remote settlements,is also a popular tourist destination thanks to the beautiful salt pools with water that people can float in.Salt is both a blessing and a curse in Siwa.Years ago,peopl...Siwa Oasis,one of Egypts most remote settlements,is also a popular tourist destination thanks to the beautiful salt pools with water that people can float in.Salt is both a blessing and a curse in Siwa.Years ago,people started realizing that there was money to be made in the salt trade,and salt mining operations created the salt lakes that the oasis is now famous for.展开更多
This study develops a geological hazard evaluation index system for Shouning County,a key area for disaster prevention in Fujian Province.Through detailed investigation reports and field surveys,six factors were selec...This study develops a geological hazard evaluation index system for Shouning County,a key area for disaster prevention in Fujian Province.Through detailed investigation reports and field surveys,six factors were selected,including elevation,slope gradient,slope aspect,stratigraphic lithological group,distance from the water systems,and geological structures.A geological hazard susceptibility zoning map was created using the Information Quantity Method(IQM).The evaluation showed that elevation,slope aspect,and distance from the water systems are primary risk factors,with high and extremely high susceptibility areas covering 168.57 km^(2)(52.63%of the study area)and a disaster point density of 3.07 points/km^(2).The model achieved an accuracy of 0.73,validating its effectiveness in hazard assessment.These findings provide a valuable reference for disaster prediction and mitigation in Shouning County,supporting improved planning and risk management efforts.展开更多
This study examines the current state of informatization education among county high school students.While students demonstrate a strong demand for informatization education,they face significant challenges,including ...This study examines the current state of informatization education among county high school students.While students demonstrate a strong demand for informatization education,they face significant challenges,including inadequate hardware,limited access to online learning resources,and insufficient teacher proficiency in informatization education.Through a questionnaire survey,the research reveals an urgent need for expanded information technology courses and specialized training programs.In response,this paper proposes strategies such as increasing investment in IT education,optimizing teaching methodologies,and providing additional learning opportunities to enhance student engagement and comprehensively improve the quality of IT education and learning outcomes in county high schools.展开更多
Biological soil crusts(BSCs)play crucial roles in improving soil fertility and promoting plants settlement and reproduction in arid areas.However,the specific effects of BSCs on growth status and nutrient accumulation...Biological soil crusts(BSCs)play crucial roles in improving soil fertility and promoting plants settlement and reproduction in arid areas.However,the specific effects of BSCs on growth status and nutrient accumulation of plants are still unclear in different arid areas.This study analyzed the effects of three different BSCs treatments(without crust(WC),intact crust(IC),and broken crust(BC))on the growth,inorganic nutrient absorption,and organic solute synthesis of three typical desert plants(Grubovia dasyphylla(Fisch.&C.A.Mey.)Freitag&G.Kadereit,Nitraria tangutorum Bobrov,and Caragana koraiensis Kom.)in the Minqin desert-oasis ecotone of Northwest China.Results showed that the effects of three BSCs treatments on seed emergence and survival of three plants varied with seed types.The IC treatment significantly hindered the emergence and survival of seeds,while the BC treatment was more conducive to seed emergence and survival of plants.BSCs significantly promoted the growth of three plants,but their effects on plant growth varied at different stages of the growth.Briefly,the growth of G.dasyphylla was affected by BSCs in early stage,but the effects on the growth of G.dasyphylla significantly weakened in the middle and late stages.However,the growth of N.tangutorum and C.koraiensis only showed differences at the middle and late stages,with a significant enhancement in growth.Analysis of variance showed that BSCs,plant species,growth period,and their interactions had significant effects on the biomass and root:shoot ratio of three plants.BSC significantly affected the nutrients absorption and organic solute synthesis in plants.Specifically,BSCs significantly promoted nitrogen(N)absorption in plants and increased plant adaptability in N poor desert ecosystems,but had no significant effects on phosphorus(P)absorption.The effects of BSCs on inorganic nutrient absorption and organic solute synthesis in plants varied significantly among different plant species.The results suggest that BSCs have significant effects on the growth and nutrient accumulation of desert plants,which will provide theoretical basis for exploring the effects of BSCs on desert plant diversity,biodiversity conservation,and ecosystem management measures in arid and semi-arid areas.展开更多
The diversity and discontinuity of plant communities in the oasis–desert ecotone are largely shaped by variations in groundwater depth,yet the relationships between spatial distribution patterns and ecological niches...The diversity and discontinuity of plant communities in the oasis–desert ecotone are largely shaped by variations in groundwater depth,yet the relationships between spatial distribution patterns and ecological niches at a regional scale remain insufficiently understood.This study examined the oasis–desert ecotone in Qira County located in the Tarim Basin of China to investigate the spatial distribution of plant communities and groundwater depth as well as their relationships using an integrated approach that combined remote sensing techniques,field monitoring,and numerical modeling.The results showed that vegetation distribution exhibits marked spatial heterogeneity,with coverage ranked as follows:Tamarix ramosissima>Phragmites australis>Populus euphratica>Alhagi sparsifolia.Numerical simulations indicated that groundwater depths range from 2.00 to 65.00 m below the surface,with the system currently in equilibrium,sustaining an average annual recharge of 1.06×10^(8) m^(3) and an average annual discharge of 1.01×10^(8) m^(3).Groundwater depth strongly influences vegetation composition and structure:Phragmites australis dominates at average groundwater depth of 5.83 m,followed by Populus euphratica at average groundwater depth of 7.05 m.As groundwater depth increases,the community is initially predominated by Tamarix ramosissima(average groundwater depth of 8.35 m),then becomes a mixture of Tamarix ramosissima,Populus euphratica,and Karelinia caspia(average groundwater depth of 10.50 m),and finally transitions to Alhagi sparsifolia(average groundwater depth of 14.30 m).These findings highlight groundwater-dependent ecological thresholds that govern plant community composition and provide a scientific basis for biodiversity conservation,ecosystem stability,and vegetation restoration in the arid oasis–desert ecotone.展开更多
In order to gain a deeper understanding of the impact of climatic conditions on mango cultivation in Jingdong County,according to the requirements for meteorological conditions from the biological characteristics of m...In order to gain a deeper understanding of the impact of climatic conditions on mango cultivation in Jingdong County,according to the requirements for meteorological conditions from the biological characteristics of mango trees,the climatic conditions of Jingdong station and the main mango production areas in Yunnan Province were compared,and the climatic characteristics in the high-and low-yield year were analyzed.The results show that in the middle and low altitude areas of Jingdong County,winter was dry and relatively warm,and summer was not extremely hot(the average temperature in the hottest month 23.8℃);the dry and wet seasons were distinct,and rainy and hot weather occurred in the same season(from June to September);there was sufficient sunshine in the winter half year.The main climatic advantages for mango cultivation in Jingdong County are manifested as follows:the overwintering temperature and light conditions were relatively favorable(the average temperature in the coldest month was 11.3℃,and average sunshine duration in the three months of winter was 6.3 h/d);the annual total heat was moderate,and≥10℃accumulated temperature was 6600℃·d;the temperature effectiveness during the main growing season of mangoes was relatively higher;the sunshine duration and climate humidity during the flower bud differentiation period were moderate(sunshine duration was 6.4 h/d,and monthly precipitation was 19.2 mm);the rainfall was abundant during the maturation period of fruits.The insufficient light and heat intensity during the maturation period of fruits(average sunshine duration was 4.4 h/d,and average temperature was 23.2℃from June to September),the susceptibility to the influence of spring drought during the young fruit stage of mangoes(precipitation was 141 mm from March to May),and relatively lower temperature during the flowering and pollination period in some years jointly constituted the main climatic constraints on local mango yield.展开更多
The construction of ecological public welfare forests is an important ccomponent and foundation of building a beautiful China and plays an important role in the construction of ecological civilization.As an important ...The construction of ecological public welfare forests is an important ccomponent and foundation of building a beautiful China and plays an important role in the construction of ecological civilization.As an important barrier to maintaining ecological balance and ensuring ecological security,ecological public welfare forests play an extremely important role in human survival and development.The construction and management of ecological public welfare forests can bring many ecological benefits to the local area;Yulong County has effectively improved the ecological environment after years of ecological public welfare forest construction.Therefore,promoting the healthy development of ecological public welfare forests is of great significance.Based on the data from the field questionnaire survey in Yulong County,this paper employs a binary regression model to analyze the influencing factors of willingness to pay for ecological compensation.It identifies the existing problems in the ecological compensation of public welfare forests in Yulong County and puts forward corresponding recommendations.These include improving the compensation policies for public welfare forests,strengthening system construction,adjusting the rural industrial structure,and increasing the income levels of farmers.The aim is to provide a reference for improving the management level and scientific management of ecological public welfare forests in Lijiang City and to achieve the management goal of continuously and stably exerting various ecological and social benefits of ecological public welfare forests.展开更多
Based on the data of meteorological elements and concentration of negative ions in the county town station,Luguhe station and Yunjishan station during 2020-2024,the temporal and spatial variations in the concentration...Based on the data of meteorological elements and concentration of negative ions in the county town station,Luguhe station and Yunjishan station during 2020-2024,the temporal and spatial variations in the concentration of negative ions and their influencing factors in Xinfeng County were analyzed.The results show that the concentration of negative ions was the highest in summer,followed by spring;it was lower in autumn and the lowest in winter.In terms of diurnal variations,it was higher in the early morning and night,and lower in the noon and afternoon,which was closely related to the diurnal variations of human activities and meteorological conditions.The factors that affect the concentration of negative ions in the air are more complex.Besides meteorological factors,vegetation,altitude,human activities and other factors should be considered.展开更多
Based on the meteorological data of 24 automatic stations in Xinfeng County,combined with the climatic conditions for the growth of Morinda officinalis F.C.How and Sarcandra glabra(Thunb.)Nakai,the climate suitability...Based on the meteorological data of 24 automatic stations in Xinfeng County,combined with the climatic conditions for the growth of Morinda officinalis F.C.How and Sarcandra glabra(Thunb.)Nakai,the climate suitability zoning indicators of M.officinalis and S.glabra in Xinfeng County were constructed by relevant statistical methods,and the climate suitability zoning indicators were divided into four grades:most suitable,suitable,sub-suitable and unsuitable.According to the results of expert scores,the relevant growth impact factors were assigned weight values.Based on geographic information system(GIS),the climate suitability zoning of M.officinalis and S.glabra planting in Xinfeng County was carried out.The results show that most areas of Xinfeng County were suitable for planting M.officinalis and S.glabra.Among them,the most suitable planting areas of M.officinalis were mainly distributed in most of Huilong Town,from Jiangnan Community of Fengcheng Street to Yuntianhai area of Meikeng Town,Matouwantian Village and areas to the south,and areas to the south of Zhutong Village,Fengcheng Street.The most suitable areas for S.glabra planting were mainly distributed in Puchang Village of Huilong Town,the northeast of Huangzhai Town,the south of Fengcheng Street,and the central-southern part of Matou Town.The zoning results provide a scientific basis for the rational layout of M.officinalis and S.glabra planting in Xinfeng County.展开更多
Guangxi Zhuang Autonomous Region is one of the most densely clustered regions of“Longevity County”in China,and Bama County is a typical representative of mountainous and hilly longevity villages in the country.In re...Guangxi Zhuang Autonomous Region is one of the most densely clustered regions of“Longevity County”in China,and Bama County is a typical representative of mountainous and hilly longevity villages in the country.In recent years,the local government and residents have actively embraced the United Nations Sustainable Development Goals(SDGs)and the Healthy China Initiative,striving to implement the scientific principle that“lucid waters and lush mountains are invaluable assets.”展开更多
基金Supported by Central Public-interest Scientific Institution Basal Research Fund of China(BRF090202)~~
文摘Guazhou County of Gansu Province is a typical ecological fragile area lying in the transition area of desert and oasis.The development of its agricultural economy is highly dependent on natural resources and environment.Contradiction of resources characterized agriculture and the fragile ecological environment has become one of the main barriers to log the impact of local agriculture to achieve sustainable development.Aiming at fragile ecological environment and limiting factors of agricultural sustainable development,thoughts and countermeasures of realizing agricultural sustainable development have been proposed.
基金Supported by National Natural Science Foundation of China(41161082)Gansu Natural Science Foundation(1107RJZA167)~~
文摘[Objective] The aim was to research influential factors of water productivity of maize in oasis in arid areas. [Method] In middle reach of Heihe River in Linze County of Zhangye City, maize, a major crop in irrigated area in the oasis, was studied and nine influential factors were chosen through grey relation analysis. [Result] According to grey relation analysis, top five factors influencing water produc- tivity of maize during 1995-2009 were as follows： applied quantity of chemical fertil- izers〉labour input〉seeds〉mulch amount〉pesticide amount, which indicated that controllable factors, instead of uncontrollable ones, dominate in influence of water productivity of maize in oasis in arid areas. [Conclusion] With water resource limited, investment of controllable factors in high-efficient agricultural production should be the major strategy to improve water productivity of maize in oasis of arid areas.
基金the Key Project of National Natural Science Foundation of China(project No.40335049)for financial support.
文摘Minqin Oasis is located in the lower reaches of the Shiyanghe River Basin, northeast of the Heixi Corridor, at the middle of the Silk Road. Because of the its existence, Badain Jaran Desert and Tengger Desert cannot converge and develop in the south. It has always been an important green barrier to guarantee the eco-security of Hexi Corridor and the Silk Road for thousands of years. But in recent decades, Minqin Oasis is becoming smaller and the desert is becoming larger. Many people, especially the governmental officials in the lower reaches think that the upper and middle reaches have robbed the lower reaches of water resources, and caused insufficient water usage and the deteriorated eco-environment, in the lower reaches, However, the governmental officials in the upper and middle reaches claim that the whole river basin should take the upper and middle reaches as the key regions to develop economy. To address the above argument, we analyze the reasons why Minqin Oasis is disappearing, and find that there are two main factors. One is the quick development of population and economy in the upper and middle reaches; the other is the rapid development of population and economy in the lower reaches. The two factors both have great effect on the water utilization for eco-environment in the lower reaches. So Minqin Oasis is disappearing not only because of the upper and middle reaches but also because of the growth of population and economy itself. The lower reaches should not completely blame the upper and middle reaches. The upper and middle reaches should also pay more attention to the eco-environment in the lower reaches. The whole river basin should develop a harmonious and sustainable relationship among the upper, middle and lower reaches.
基金National Natural Science Foundation of China （Grant No.40261006） West Light Foundation of The Chinese Academy of Science, Xinjiang Universities Scientific Research Plan （Grant No. XJEDU2004S03, XJEDU2005107） Doctoral Start Fund of Xinjiang University.
文摘The periphery of oasis plays an important role in mutual transformation between desert and oasis. Vegetation is an important part in the ecosystem and it is an important index indicating certain landscape, Based on several times field investigation, this paper attaches importance to the feasible measures for vegetation restoration according to the current condition of study area - Qira County of Xinjiang Uygur Autonomous Region, In order to improve die local ecological environment, people lived in Qira County should work bard to protect their homehind and reduce the degree of sandstorm, More protection forest should be established along with other ecological techniques. Results derived from this study contribute largely to the ecological environmental protection of oasis.
基金The Foundation for Distinguished Young Scholars of Gansu Province,No.22JR5RA046Key Research Program of Gansu Province,No.23ZDKA0004+2 种基金The Joint Funds of the National Natural Science Foundation of China,No.U22A202690Interdisciplinary Youth Team Project from the Key Laboratory of Cryospheric Science and Frozen Soil Engineering,No.CSFSE-ZQ-2408The Youth Innovation Promotion Association CAS to X.W.,No.2020422。
文摘Carbon fluxes are essential indicators assessing vegetation carbon cycle functions.However,the extent and mechanisms by which climate change and human activities influence the spatiotemporal dynamics of carbon fluxes in arid oasis and non-oasis area remains unclear.Here,we assessed and predicted the future effects of climate change and human activities on carbon fluxes in the Hexi Corridor.The results showed that the annual average gross primary productivity(GPP),net ecosystem productivity(NEP),and ecosystem respiration(Reco)in the Hexi Corridor oasis increased by 263.91 g C·m^(-2)·yr^(-1),118.45 g C·m^(-2)·yr^(-1)and 122.46 g C·m^(-2)·yr^(-1),respectively,due to the expansion of the oasis area by 3424.84 km^(2) caused by human activities from 2000 to 2022.Both oasis and non-oasis arid ecosystems in the Hexi Corridor acted as carbon sinks.Compared to the non-oasis area,the carbon fluxes contributions of oasis area increased,ranging from 10.21%to 13.99%for GPP,8.50%to11.68%for NEP,and 13.34%to 17.13%for Reco.The contribution of the carbon flux from the oasis expansion area to the total carbon flux change in the Hexi Corridor was 30.96%(7.09 Tg C yr^(-1))for GPP,29.57%(3.39 Tg C yr^(-1))for NEP and 32.40%(3.58 Tg C yr^(-1))for Reco.The changes in carbon fluxes in the oasis area were mainly attributed to human activities(oasis expansion)and temperature,whereas non-oasis area was mainly due to climate factors.Moreover,the future increasing trends were observed for GPP(64.99%),NEP(66.29%)and Reco(82.08%)in the Hexi Corridor.This study provides new insights into the regulatory mechanisms of carbon cycle in the arid oasis and non-oasis area.
文摘Counties are emerging as increasingly important units of China’s national economy.As of the end of 2023,China has 59 counties with annual GDP exceeding 100 billion yuan($14 billion),and their combined GDP reached 9.6 trillion yuan($1.3 trillion),accounting for 7.6 percent of the country’s total.
基金Supported by National Natural Science Foundation of China(42171206&42071159).
文摘[Objectives]To explore the spatiotemporal evolution and development drivers for Taobao villages in Cao County.[Methods]This paper employs GIS spatial analysis methods such as standard deviation ellipse and kernel density to characterize the spatial distribution,agglomeration,and correlation features of Taobao villages in Cao County at the township scale.Additionally,geographic detectors are used to explore influencing factors.[Results](i)The number of Taobao villages in Cao County exhibits phased characteristics,progressing through initial,rapid expansion,and stable development stages.(ii)Taobao villages are unevenly distributed,with significant clustering features,primarily concentrated in the southeastern part of the county.In recent years,they have expanded toward the central and northwestern regions,potentially forming a"multi-core"spatial pattern in the future.(iii)The number of garment industries and e-commerce industrial parks consistently remains the primary factor influencing the spatial distribution of Taobao villages.After 2020,the number of wood processing industries and specialty agricultural product processing industries also exerted considerable influence.The number of logistics parks began to have an impact after 2018,albeit a weak one.Other factors had minimal influence on the differentiation of Taobao villages.[Conclusions]The spatiotemporal evolution exhibited diffusion along the"northwest-southeast"axis,with strengthened regional clustering.Government policies and industries significantly influenced the differentiation of Taobao villages,with varying primary factors across different periods.
基金Supported by National College Students Innovation and Entrepreneurship Training Program(202314390006)National College Students Innovation and Entrepreneurship Training Program(202414390005)Teaching Reform Project of Shaanxi Xueqian Normal University(25JG018Y).
文摘This study focuses on the Gynostemma pentaphyllum industry in Pingli County, Shaanxi Province. Through literature analysis and data statistics, it systematically reviews the current status of cultivation, processing, sales, and research & development of G. pentaphyllum , identifies core industrial development issues, and proposes sustainable development strategies based on policy, market, and technological trends. The research reveals that Pingli County has established a large-scale cultivation and primary processing system for G. pentaphyllum , but faces challenges including insufficient development of high value-added products and weak brand influence. Future industrial upgrading should be achieved through technological innovation, brand building, and industrial chain extension.
文摘Siwa Oasis,one of Egypts most remote settlements,is also a popular tourist destination thanks to the beautiful salt pools with water that people can float in.Salt is both a blessing and a curse in Siwa.Years ago,people started realizing that there was money to be made in the salt trade,and salt mining operations created the salt lakes that the oasis is now famous for.
基金2024 Guiding Science and Technology Program of Fujian Province(No.2024H0026)2025 Innovation Fund Project of Fujian Province(No.2025C0004).
文摘This study develops a geological hazard evaluation index system for Shouning County,a key area for disaster prevention in Fujian Province.Through detailed investigation reports and field surveys,six factors were selected,including elevation,slope gradient,slope aspect,stratigraphic lithological group,distance from the water systems,and geological structures.A geological hazard susceptibility zoning map was created using the Information Quantity Method(IQM).The evaluation showed that elevation,slope aspect,and distance from the water systems are primary risk factors,with high and extremely high susceptibility areas covering 168.57 km^(2)(52.63%of the study area)and a disaster point density of 3.07 points/km^(2).The model achieved an accuracy of 0.73,validating its effectiveness in hazard assessment.These findings provide a valuable reference for disaster prediction and mitigation in Shouning County,supporting improved planning and risk management efforts.
文摘This study examines the current state of informatization education among county high school students.While students demonstrate a strong demand for informatization education,they face significant challenges,including inadequate hardware,limited access to online learning resources,and insufficient teacher proficiency in informatization education.Through a questionnaire survey,the research reveals an urgent need for expanded information technology courses and specialized training programs.In response,this paper proposes strategies such as increasing investment in IT education,optimizing teaching methodologies,and providing additional learning opportunities to enhance student engagement and comprehensively improve the quality of IT education and learning outcomes in county high schools.
基金supported by the Natural Science Foundation of Gansu Province,China(24JRRA733,23JRRA589)the National Natural Science Foundation of China(42377470,42207539)the Light of Western Light Program of Talent Cultivation of Chinese Academy of Sciences(22JR9KA028).
文摘Biological soil crusts(BSCs)play crucial roles in improving soil fertility and promoting plants settlement and reproduction in arid areas.However,the specific effects of BSCs on growth status and nutrient accumulation of plants are still unclear in different arid areas.This study analyzed the effects of three different BSCs treatments(without crust(WC),intact crust(IC),and broken crust(BC))on the growth,inorganic nutrient absorption,and organic solute synthesis of three typical desert plants(Grubovia dasyphylla(Fisch.&C.A.Mey.)Freitag&G.Kadereit,Nitraria tangutorum Bobrov,and Caragana koraiensis Kom.)in the Minqin desert-oasis ecotone of Northwest China.Results showed that the effects of three BSCs treatments on seed emergence and survival of three plants varied with seed types.The IC treatment significantly hindered the emergence and survival of seeds,while the BC treatment was more conducive to seed emergence and survival of plants.BSCs significantly promoted the growth of three plants,but their effects on plant growth varied at different stages of the growth.Briefly,the growth of G.dasyphylla was affected by BSCs in early stage,but the effects on the growth of G.dasyphylla significantly weakened in the middle and late stages.However,the growth of N.tangutorum and C.koraiensis only showed differences at the middle and late stages,with a significant enhancement in growth.Analysis of variance showed that BSCs,plant species,growth period,and their interactions had significant effects on the biomass and root:shoot ratio of three plants.BSC significantly affected the nutrients absorption and organic solute synthesis in plants.Specifically,BSCs significantly promoted nitrogen(N)absorption in plants and increased plant adaptability in N poor desert ecosystems,but had no significant effects on phosphorus(P)absorption.The effects of BSCs on inorganic nutrient absorption and organic solute synthesis in plants varied significantly among different plant species.The results suggest that BSCs have significant effects on the growth and nutrient accumulation of desert plants,which will provide theoretical basis for exploring the effects of BSCs on desert plant diversity,biodiversity conservation,and ecosystem management measures in arid and semi-arid areas.
基金financially supported by the Tianchi Talents Program of Xinjiang Uygur Autonomous Region(E5358525,2025–2026)the Major Science and Technology Special Project of Xinjiang Uygur Autonomous Region(2024A03009-4)+4 种基金the Third Xinjiang Scientific Expedition Program(2022xjkk010402)the National Key Research and Development Program of China(2022FY202305-06)the Tianshan Talents Program of Xinjiang Uygur Autonomous Region(2022TSYCJU0002)the Outstanding Member of the Youth Innovation Promotion Association of the Chinese Academy of Sciences(20192024–2026).
文摘The diversity and discontinuity of plant communities in the oasis–desert ecotone are largely shaped by variations in groundwater depth,yet the relationships between spatial distribution patterns and ecological niches at a regional scale remain insufficiently understood.This study examined the oasis–desert ecotone in Qira County located in the Tarim Basin of China to investigate the spatial distribution of plant communities and groundwater depth as well as their relationships using an integrated approach that combined remote sensing techniques,field monitoring,and numerical modeling.The results showed that vegetation distribution exhibits marked spatial heterogeneity,with coverage ranked as follows:Tamarix ramosissima>Phragmites australis>Populus euphratica>Alhagi sparsifolia.Numerical simulations indicated that groundwater depths range from 2.00 to 65.00 m below the surface,with the system currently in equilibrium,sustaining an average annual recharge of 1.06×10^(8) m^(3) and an average annual discharge of 1.01×10^(8) m^(3).Groundwater depth strongly influences vegetation composition and structure:Phragmites australis dominates at average groundwater depth of 5.83 m,followed by Populus euphratica at average groundwater depth of 7.05 m.As groundwater depth increases,the community is initially predominated by Tamarix ramosissima(average groundwater depth of 8.35 m),then becomes a mixture of Tamarix ramosissima,Populus euphratica,and Karelinia caspia(average groundwater depth of 10.50 m),and finally transitions to Alhagi sparsifolia(average groundwater depth of 14.30 m).These findings highlight groundwater-dependent ecological thresholds that govern plant community composition and provide a scientific basis for biodiversity conservation,ecosystem stability,and vegetation restoration in the arid oasis–desert ecotone.
基金Supported by the Meteorological Science and Technology Innovation Project of Pu'er Meteorological Bureau(PZ202416).
文摘In order to gain a deeper understanding of the impact of climatic conditions on mango cultivation in Jingdong County,according to the requirements for meteorological conditions from the biological characteristics of mango trees,the climatic conditions of Jingdong station and the main mango production areas in Yunnan Province were compared,and the climatic characteristics in the high-and low-yield year were analyzed.The results show that in the middle and low altitude areas of Jingdong County,winter was dry and relatively warm,and summer was not extremely hot(the average temperature in the hottest month 23.8℃);the dry and wet seasons were distinct,and rainy and hot weather occurred in the same season(from June to September);there was sufficient sunshine in the winter half year.The main climatic advantages for mango cultivation in Jingdong County are manifested as follows:the overwintering temperature and light conditions were relatively favorable(the average temperature in the coldest month was 11.3℃,and average sunshine duration in the three months of winter was 6.3 h/d);the annual total heat was moderate,and≥10℃accumulated temperature was 6600℃·d;the temperature effectiveness during the main growing season of mangoes was relatively higher;the sunshine duration and climate humidity during the flower bud differentiation period were moderate(sunshine duration was 6.4 h/d,and monthly precipitation was 19.2 mm);the rainfall was abundant during the maturation period of fruits.The insufficient light and heat intensity during the maturation period of fruits(average sunshine duration was 4.4 h/d,and average temperature was 23.2℃from June to September),the susceptibility to the influence of spring drought during the young fruit stage of mangoes(precipitation was 141 mm from March to May),and relatively lower temperature during the flowering and pollination period in some years jointly constituted the main climatic constraints on local mango yield.
文摘The construction of ecological public welfare forests is an important ccomponent and foundation of building a beautiful China and plays an important role in the construction of ecological civilization.As an important barrier to maintaining ecological balance and ensuring ecological security,ecological public welfare forests play an extremely important role in human survival and development.The construction and management of ecological public welfare forests can bring many ecological benefits to the local area;Yulong County has effectively improved the ecological environment after years of ecological public welfare forest construction.Therefore,promoting the healthy development of ecological public welfare forests is of great significance.Based on the data from the field questionnaire survey in Yulong County,this paper employs a binary regression model to analyze the influencing factors of willingness to pay for ecological compensation.It identifies the existing problems in the ecological compensation of public welfare forests in Yulong County and puts forward corresponding recommendations.These include improving the compensation policies for public welfare forests,strengthening system construction,adjusting the rural industrial structure,and increasing the income levels of farmers.The aim is to provide a reference for improving the management level and scientific management of ecological public welfare forests in Lijiang City and to achieve the management goal of continuously and stably exerting various ecological and social benefits of ecological public welfare forests.
文摘Based on the data of meteorological elements and concentration of negative ions in the county town station,Luguhe station and Yunjishan station during 2020-2024,the temporal and spatial variations in the concentration of negative ions and their influencing factors in Xinfeng County were analyzed.The results show that the concentration of negative ions was the highest in summer,followed by spring;it was lower in autumn and the lowest in winter.In terms of diurnal variations,it was higher in the early morning and night,and lower in the noon and afternoon,which was closely related to the diurnal variations of human activities and meteorological conditions.The factors that affect the concentration of negative ions in the air are more complex.Besides meteorological factors,vegetation,altitude,human activities and other factors should be considered.
文摘Based on the meteorological data of 24 automatic stations in Xinfeng County,combined with the climatic conditions for the growth of Morinda officinalis F.C.How and Sarcandra glabra(Thunb.)Nakai,the climate suitability zoning indicators of M.officinalis and S.glabra in Xinfeng County were constructed by relevant statistical methods,and the climate suitability zoning indicators were divided into four grades:most suitable,suitable,sub-suitable and unsuitable.According to the results of expert scores,the relevant growth impact factors were assigned weight values.Based on geographic information system(GIS),the climate suitability zoning of M.officinalis and S.glabra planting in Xinfeng County was carried out.The results show that most areas of Xinfeng County were suitable for planting M.officinalis and S.glabra.Among them,the most suitable planting areas of M.officinalis were mainly distributed in most of Huilong Town,from Jiangnan Community of Fengcheng Street to Yuntianhai area of Meikeng Town,Matouwantian Village and areas to the south,and areas to the south of Zhutong Village,Fengcheng Street.The most suitable areas for S.glabra planting were mainly distributed in Puchang Village of Huilong Town,the northeast of Huangzhai Town,the south of Fengcheng Street,and the central-southern part of Matou Town.The zoning results provide a scientific basis for the rational layout of M.officinalis and S.glabra planting in Xinfeng County.
文摘Guangxi Zhuang Autonomous Region is one of the most densely clustered regions of“Longevity County”in China,and Bama County is a typical representative of mountainous and hilly longevity villages in the country.In recent years,the local government and residents have actively embraced the United Nations Sustainable Development Goals(SDGs)and the Healthy China Initiative,striving to implement the scientific principle that“lucid waters and lush mountains are invaluable assets.”
