典型文献
Divergent effects of climate change on cropland ecosystem water use efficiency at different elevations in southwestern China
文献摘要：
Understanding climatic effects on cropland water use efficiency at different eleva-tions is imperative for managing agricultural water and production in response to ongoing climate change in climate-sensitive areas with complex topography,such as southwestern China.We investigated climatic effects on cropland water use efficiency in southwestern China at each 100-m elevation bin during 2001-2017.The maximum water use efficiency was 1.71 gC kg-1 H2O for the 1900-1999 m elevation bin under the growing season temperature and precipitation of 14.58±0.32℃and 965.40±136.45 mm,respectively.The water use effi-ciency slopes were dominated by the evapotranspiration slopes at elevations below 1999 m but were controlled by the gross primary productivity slopes at elevations above 2000 m.This difference was caused by the substantial responses of evaporation to climate change at lower elevations and the increased climatic sensitivity of gross primary productivity at higher eleva-tions.In comparison to those at other elevations,croplands at lower elevations were more vulnerable to extreme drought because of the dominant role fluctuating evapotranspiration played in water use efficiency.The findings will improve cropland water management in the study area.
文献关键词：
中图分类号：
作者姓名：
TAO Jian;ZHU Juntao;ZHANG Yangjian;DONG Jinwei;ZHANG Xianzhou
作者机构：
School of Public Administration,Shandong Technology and Business University,Yantai 264005,Shandong,China;Nagqu Alpine Grassland Research Station,Key Laboratory of Ecosystem Network Observation and Model-ing,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China;Key Laboratory of Land Surface Pattern and Simulation,Institute of Geographic Sciences and Natural Re-sources Research,CAS,Beijing 100101,China
文献出处：
引用格式：
[1]TAO Jian;ZHU Juntao;ZHANG Yangjian;DONG Jinwei;ZHANG Xianzhou-.Divergent effects of climate change on cropland ecosystem water use efficiency at different elevations in southwestern China)[J].地理学报（英文版）,2022(08):1601-1614
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Divergent,effects,climate,change,ecosystem,water,efficiency,different,elevations,southwestern,China,Understanding,climatic,imperative,managing,agricultural,production,ongoing,sensitive,areas,complex,topography,such,We,investigated,each,bin,during,maximum,was,gC,H2O,under,growing,season,temperature,precipitation,respectively,slopes,were,dominated,by,evapotranspiration,below,but,controlled,gross,primary,productivity,above,This,difference,caused,substantial,responses,evaporation,lower,increased,sensitivity,higher,In,comparison,those,other,croplands,more,vulnerable,extreme,drought,because,dominant,role,fluctuating,played,findings,will,improve,management,study
AB值：
0.459215
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