Differences in ecosystem water-use efficiency among the typical croplands
文献类型：期刊论文
| 作者 | Wang, Tongxin1; Tang, Xuguang1,2,3; Zheng, Chen1; Gu, Qing1; Wei, Jin1; Ma, Mingguo1,3 |
| 刊名 | AGRICULTURAL WATER MANAGEMENT
 |
| 出版日期 | 2018-10-30 |
| 卷号 | 209页码:142-150 |
| 关键词 | Water-use efficiency Cropland GPP ET C-3/C-4 plant |
| ISSN号 | 0378-3774 |
| DOI | 10.1016/j.agwat.2018.07.030 |
| 通讯作者 | Tang, Xuguang(xgtang@swu.edu.cn) |
| 英文摘要 | Water 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. |
| WOS关键词 | EDDY-COVARIANCE MEASUREMENTS ; GROSS PRIMARY PRODUCTION ; SATELLITE SENSOR DATA ; CARBON-DIOXIDE ; CLIMATE-CHANGE ; INTERANNUAL VARIABILITY ; TERRESTRIAL VEGETATION ; TURBULENCE STATISTICS ; ATMOSPHERE EXCHANGE ; AGRICULTURAL WATER |
| 资助项目 | Fundamental 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] |
| WOS研究方向 | Agriculture ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000443661600014 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | Fundamental Research Funds for the Central Universities in China ; Chongqing Basic and Frontier Research Program ; China Postdoctoral Science Foundation |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/54257]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Tang, Xuguang |
| 作者单位 | 1.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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：地理科学与资源研究所
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