globalchange  > 气候变化与战略
DOI: 10.1016/j.agwat.2019.105906
论文题名:
Improving/maintaining water-use efficiency and yield of wheat by deficit irrigation: A global meta-analysis
作者: Yu L.; Zhao X.; Gao X.; Siddique K.H.M.
刊名: Agricultural Water Management
ISSN: 3783774
出版年: 2020
卷: 228
语种: 英语
英文关键词: Limited irrigation ; Meta-analysis ; Trade-off ; Water-use efficiency ; Win-win ; Yield
Scopus关键词: Climate change ; Economic and social effects ; Efficiency ; Population statistics ; Limited irrigations ; Meta analysis ; Trade off ; Water use efficiency ; Win-win ; Yield ; Sprinkler systems (irrigation) ; climate change ; crop improvement ; crop yield ; food production ; furrow irrigation ; growing season ; growth ; meta-analysis ; strategic approach ; trade-off ; water use efficiency ; wheat ; Triticum aestivum
英文摘要: Population growth and climate change are necessitating increases in food production and reduction in amounts of water used for agriculture. Deficit irrigation has been proposed as a strategy to maintain/increase yield while reducing the use of water in agriculture; however, it has not been widely adopted, in part, due to risk of reduced yield. In this paper, we describe a meta-analysis designed to quantify effects of deficit irrigation on wheat water-use efficiency (WUE) and yields, and identify optimal strategies for deploying deficit irrigation to achieve win-win effects of improving WUE and yield simultaneously. Overall, the meta-analysis of 41 peer-reviewed publications collectively containing over 381 observations showed that the win-win relationship between WUE and wheat yield does exist. Overall, deficit irrigation improved wheat WUE by 6.6 % but decreased yield by 16.2 %. However, the results varied, depending on irrigation methods (such as irrigation type, timing and water amount) and environmental factors (such as precipitation, temperature and soil properties). In order to maximize win-win effects and minimize tradeoff between WUE and yield, we found that deficit irrigation is most appropriate for areas where total precipitation during the growing season is less than 200 mm and the soil is loamy or sandy. Deficit irrigation using border and furrow irrigation is more likely to achieve high WUE and yield concurrently than drip or sprinkler irrigation. Importantly, we found that the most influential factors affecting yield and WUE are the irrigation level, and the irrigation thresholds to achieve various scenarios between WUE and yield. Our findings suggest deficit irrigation can improve yield and WUE simultaneously, and identifies the conditions under which these improvements can be realized. © 2019 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159225
Appears in Collections:气候变化与战略

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作者单位: College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi Province 712100, China; Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi Province 712100, China; Institute of Soil and Water Conservation, Chinese Academy of Science & Ministry of Water Resources, Yangling, Shaanxi Province 712100, China; National Engineering Research Center of Water Saving and Irrigation Technology, Yangling, Shaanxi Province 712100, China; Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, Yangling, Shaanxi Province 712100, China; Univ Western Australia, UWA Inst Agr, LB 5005, Perth, WA 6001, Australia

Recommended Citation:
Yu L.,Zhao X.,Gao X.,et al. Improving/maintaining water-use efficiency and yield of wheat by deficit irrigation: A global meta-analysis[J]. Agricultural Water Management,2020-01-01,228
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