IGSNRR OpenIR
Differences in ecosystem water-use efficiency among the typical croplands
Wang, Tongxin1; Tang, Xuguang1,2,3; Zheng, Chen1; Gu, Qing1; Wei, Jin1; Ma, Mingguo1,3
2018-10-30
Source PublicationAGRICULTURAL WATER MANAGEMENT
ISSN0378-3774
Volume209Pages:142-150
Corresponding AuthorTang, Xuguang(xgtang@swu.edu.cn)
AbstractWater use efficiency (WUE) is an important parameter to assess agricultural production and the reasonable utilization of water resources. Especially in the context of changing hydrological environment, more attention need to be paid on how to use limited water resource to improve crop yield for ensuring food security. Based on 33 site-years of flux measurements over 10 cropland sites using the eddy covariance (EC) technique, the study systematically evaluated the large differences in seasonal and interannual variations of gross primary productivity (GPP), evapotranspiration (ET) and ecosystem WUE across the four crops worldwide including soybean, maize, winter wheat and paddy rice. The lengths of the growing seasons across the main crops extracted from time-series MODIS NDVI data, implied that the longest growth period in winter wheat and the shortest growing season in paddy rice field. Further analyses suggest that maize cropland has the strongest ecosystem WUE with 2.48 +/- 0.69 g C kg(-1) H2O, followed by winter wheat (2.00 +/- 0.39 g C kg(-1) H2O), soybean (1.92 +/- 0.52 g C kg(-1) H2O), and paddy rice (1.88 +/- 0.63 g C kg(-1) H2O). Meanwhile, the variability in ecosystem WUE exhibited apparent seasonality, and peaked together with GPP in the most active summertime. A series of biotic and abiotic factors affected the GPP as well as WUE variability. Given the complicated interactions among these environmental factors, this study revealed the great potential to remotely retrieve the WUE variability using time-series MODIS NDVI data over large areas. Ecosystem WUE of the C-4 crop -maize was obviously higher than the other three C-3 crops. Engineering C-4 feature into C-3 crops may be a feasible way to increase photosynthesis and yield.
KeywordWater-use efficiency Cropland GPP ET C-3/C-4 plant
DOI10.1016/j.agwat.2018.07.030
WOS KeywordEDDY-COVARIANCE MEASUREMENTS ; GROSS PRIMARY PRODUCTION ; SATELLITE SENSOR DATA ; CARBON-DIOXIDE ; CLIMATE-CHANGE ; INTERANNUAL VARIABILITY ; TERRESTRIAL VEGETATION ; TURBULENCE STATISTICS ; ATMOSPHERE EXCHANGE ; AGRICULTURAL WATER
Indexed BySCI
Language英语
Funding ProjectFundamental Research Funds for the Central Universities in China[XDJK2018C017] ; Fundamental Research Funds for the Central Universities in China[SWU116088] ; Chongqing Basic and Frontier Research Program[cstc2018jcyjAX0056] ; China Postdoctoral Science Foundation[2017M610109]
Funding OrganizationFundamental Research Funds for the Central Universities in China ; Chongqing Basic and Frontier Research Program ; China Postdoctoral Science Foundation
WOS Research AreaAgriculture ; Water Resources
WOS SubjectAgronomy ; Water Resources
WOS IDWOS:000443661600014
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/54258
Collection中国科学院地理科学与资源研究所
Corresponding AuthorTang, Xuguang
Affiliation1.Southwest Univ, Chongqing Engn Res Ctr Remote Sensing Big Data Ap, Sch Geog Sci, Chongqing 400715, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
3.Southwest Univ, Res Base Karst Ecoenvironm Nanchuan Chongqing, Minist Nat Resources, Sch Geog Sci, Chongqing 400715, Peoples R China
Recommended Citation
GB/T 7714
Wang, Tongxin,Tang, Xuguang,Zheng, Chen,et al. Differences in ecosystem water-use efficiency among the typical croplands[J]. AGRICULTURAL WATER MANAGEMENT,2018,209:142-150.
APA Wang, Tongxin,Tang, Xuguang,Zheng, Chen,Gu, Qing,Wei, Jin,&Ma, Mingguo.(2018).Differences in ecosystem water-use efficiency among the typical croplands.AGRICULTURAL WATER MANAGEMENT,209,142-150.
MLA Wang, Tongxin,et al."Differences in ecosystem water-use efficiency among the typical croplands".AGRICULTURAL WATER MANAGEMENT 209(2018):142-150.
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