Management practices regulate the response of canopy and ecosystem water use efficiency in cropland ecosystems
文献类型：期刊论文
| 作者 | Chen, Yanan5; Tang, Xuguang4; Yao, Li5; Zhao, Yan5; Li, Guo5; Wu, Chaoyang3; Zhou, Yanlian2; Sharma, Ashutosh1 |
| 刊名 | FIELD CROPS RESEARCH
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 304页码:14 |
| 关键词 | Water use efficiency GPP Management practices Eddy covariance Crops |
| ISSN号 | 0378-4290 |
| DOI | 10.1016/j.fcr.2023.109166 |
| 通讯作者 | Tang, Xuguang(xgtang@hznu.edu.cn) |
| 英文摘要 | Context: With rising global temperature and frequent drought events, water resource supply is facing to great challenge. Understanding the effects of different management practices on cropland water use efficiency (WUE) is crucial to promote effective allocation of water resources and food security.Objective: The objective of this study was to reveal the contrasting effects of different farm management practices including continuous and rotational, tillage and no-till, irrigated and rainfed on cropland water use efficiency from canopy (WUET) to ecosystem (WUEET) scales, respectively. Methods: On the basis of 26 site-years eddy covariance-based carbon and water flux observations, this study used the underlying WUE (uWUE) model to partition evapotranspiration (ET) across maize and soybean ecosystems. Three control groups were used to compare the effects of different management practices on the coupling relationships between terrestrial carbon and water cycles, respectively.Results: Compared with the rotational maize-soybean site, both WUET and WUEET at the continuous maize site were larger, which was mainly ascribed to stronger gross primary productivity (GPP) for the C4 crop. But over the maize-planting years, both WUET and WUEET at the rotational site were higher than the continuous site owing to the nitrogen fixation by rhizobia for preceding year, especially for WUET. Under conventional tillage and no-till management, multi-year mean WUEET and WUET were contrasting. WUEET under no-till was apparently larger than WUEET under till, because of similar GPP but relatively lower ET. Meanwhile, more water was consumed by crop transpiration (T) under no-till, which led to lower WUET in comparison with WUET under till. In comparison with the rainfed farming, GPP, ET and T all increased apparently after irrigation. However, both WUET and WUEET at the irrigated site were not improved owing to more water lost with relatively fewer GPP increase.Conclusions: The study suggested that the crop rotation system can improve both WUEET and WUET apparently. Meanwhile, fewer water resource was consumed by cropland under no-till management. Finally, irrigation farming improved the cropland GPP but reduced WUEET and WUET.Implications: Our results provide valuable management implications for understanding the mechanisms that can enhance water use efficiency and result in significant water savings and high yield. |
| WOS关键词 | HEIHE RIVER-BASIN ; LEAF-AREA INDEX ; EDDY-COVARIANCE ; VEGETATION CONTROL ; LOESS PLATEAU ; TIME-SERIES ; EVAPOTRANSPIRATION ; CARBON ; CHINA ; TRANSPIRATION |
| 资助项目 | Fundamental Research Funds for the Central Universities[SWU2209225] ; Strategic Priority Research Program of the Chi-nese Academy of Sciences[XDA19040103] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:001097059200001 |
| 出版者 | ELSEVIER |
| 资助机构 | Fundamental Research Funds for the Central Universities ; Strategic Priority Research Program of the Chi-nese Academy of Sciences |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/199632]  |
| 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.Indian Inst Technol Roorkee, Dept Hydrol, Roorkee 247667, Uttarakhand, India 2.Nanjing Univ, Int Inst Earth Syst Sci, Nanjing 210023, Peoples R China 3.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 4.Hangzhou Normal Univ, Inst Remote Sensing & Geosci, Zhejiang Prov Key Lab UrbanWetlands & Reg Change, Hangzhou 311121, Peoples R China 5.Southwest Univ, Sch Geog Sci, Chongqing 400715, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Yanan,Tang, Xuguang,Yao, Li,et al. Management practices regulate the response of canopy and ecosystem water use efficiency in cropland ecosystems[J]. FIELD CROPS RESEARCH,2023,304:14. |
| APA | Chen, Yanan.,Tang, Xuguang.,Yao, Li.,Zhao, Yan.,Li, Guo.,...&Sharma, Ashutosh.(2023).Management practices regulate the response of canopy and ecosystem water use efficiency in cropland ecosystems.FIELD CROPS RESEARCH,304,14. |
| MLA | Chen, Yanan,et al."Management practices regulate the response of canopy and ecosystem water use efficiency in cropland ecosystems".FIELD CROPS RESEARCH 304(2023):14. |
入库方式： OAI收割
来源：地理科学与资源研究所
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