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Effects of water stress on water use efficiency of irrigated and rainfed wheat in the Loess Plateau, China

文献类型：期刊论文

作者Yu, Q (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.; Wei Ren3; Bo Tao3; Ning Jin2; Liang He4; Qingfu Ren2; Shiqing Li2; Qiang Yu1,2
刊名SCIENCE OF THE TOTAL ENVIRONMENT
出版日期2018
卷号642页码:1-11
ISSN号0048-9697
关键词Water Use Efficiency (Wue) Irrigated And Rainfed Wheat Modis Ndvi Time Series Water Stress Light Use Efficiency Model
DOI10.1016/j.scitotenv.2018.06.028
文献子类Article
英文摘要The Loess Plateau, the largest arid and semi-arid zone in China, has been confronted with more severe water resource pressure and a growing demand for food production under global changes. For developing sustainable agriculture in this region, it is critical to learn spatiotemporal variations in water use efficiency (WUE) of main crops (e.g. winter wheat in this region) under various water management practices. In this study, we classified irrigated and rainfed wheat areas based on MODIS data, and calculated the winter wheat yield by using an improved light use efficiency model. The actual evapotranspiration (ETa) of winter wheat and the evapotranspiration drought index (EDI) were also investigated. Then we mainly examined the synergistic relationship between crop yield, ETa, and WUE, and analyzed the variations in WUE of irrigated and rainfed wheat under water stress during the 2010-2011 growing season. The results suggested that winter wheat in the Loess Plateau was primarily dominated by fainted wheat. The average yield of irrigated wheat was 3928.4 kg/ha, 22.2% more than that of rainfed wheat. High spatial heterogeneities of harvest index (HI) and maximum light use efficiency (epsilon(max )) were found in the Loess Plateau. The ETa of irrigated wheat was 102% more than that of rainfed wheat. The ratio of irrigated and rainfed wheat under no water stress was 31.55% and 17.16%, respectively. With increasing water stress, the WUE of rainfed wheat decreased more quickly than that of irrigated wheat. The WUE variations in winter wheat under water stress depended strongly on the synergistic effects of two WUE components (crop yield and ETa) and their response to environmental conditions as well as water management practices (irrigated or rainfed). Our findings enhance our current understanding of the variations in WUE as affected by water stress under various water use conditions in arid and semi-arid areas. (C) 2018 Elsevier B.V. All rights reserved.
学科主题Environmental Sciences & Ecology
出版地PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000439405600001
资助机构China Postdoctoral Science Foundation [2017M613212] ; China Postdoctoral Science Foundation [2017M613212] ; Special-Fund of talents (Thousand Talents Program) in Northwest AF University [Z111021701] ; Special-Fund of talents (Thousand Talents Program) in Northwest AF University [Z111021701] ; National Natural Science Foundation of China [41730645] ; National Natural Science Foundation of China [41730645] ; China Postdoctoral Science Foundation [2017M613212] ; China Postdoctoral Science Foundation [2017M613212] ; Special-Fund of talents (Thousand Talents Program) in Northwest AF University [Z111021701] ; Special-Fund of talents (Thousand Talents Program) in Northwest AF University [Z111021701] ; National Natural Science Foundation of China [41730645] ; National Natural Science Foundation of China [41730645]
源URL[http://ir.iswc.ac.cn/handle/361005/8170]  
专题水保所科研产出--SCI_2018--SCI
通讯作者Yu, Q (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.
作者单位1.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
2.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
3.Univ Kentucky, Coll Agr Food & Environm, Dept Plant & Soil Sci, Lexington, KY 40506 USA
4.Ctr, Beijing 100081, Peoples R China
5.Univ Technol Sydney, Sch Life Sci, POB 123, Broadway, NSW 2007, Australia
推荐引用方式
GB/T 7714		 Yu, Q ,Wei Ren,Bo Tao,et al. Effects of water stress on water use efficiency of irrigated and rainfed wheat in the Loess Plateau, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,642:1-11.
APA Yu, Q .,Wei Ren.,Bo Tao.,Ning Jin.,Liang He.,...&Qiang Yu.(2018).Effects of water stress on water use efficiency of irrigated and rainfed wheat in the Loess Plateau, China.SCIENCE OF THE TOTAL ENVIRONMENT,642,1-11.
MLA Yu, Q ,et al."Effects of water stress on water use efficiency of irrigated and rainfed wheat in the Loess Plateau, China".SCIENCE OF THE TOTAL ENVIRONMENT 642(2018):1-11.

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来源：水土保持研究所

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