| Cite this article: | 肖剑峰,吴梦洋,汤树海,等.灌溉措施对稻田排水、灰水足迹和水分利用效率的影响[J].灌溉排水学报,0,():-. |
| Xiao JIanfeng,Wu Mengyang,Tang Shuhai,et al.灌溉措施对稻田排水、灰水足迹和水分利用效率的影响[J].灌溉排水学报,0,():-. |
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| Effects of irrigation practices on drainage, grey water footprint and water use efficiency in paddy fields |
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Xiao JIanfeng,Wu Mengyang,Tang Shuhai,et al
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1.Hohai University;2.Lian Shui Water Conservancy Research Institute
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| Abstract: |
| 【Background】Reduce the environmental load while improving the utility of water resources is an inevitable trend of agricultural water-saving research.【Objective】In order to comprehensively reveal the utilization of water resources in paddy fields and select the efficient irrigation and drainage modes, experiments under four irrigation measures, frequent and shallow irrigation (FSI), wet-shallow irrigation (WSI), controlled irrigation (COI), rain-catching and controlled irrigation (RCI) were conducted. Based on the observation of migration process of water and fertilizer, this paper analyzed the impact of irrigation measures on drainage, grey water footprint (GWF) and water use efficiency combined with water footprint (WF) and water use efficiency indicators.【Result】(1) In 2017-2018, the drainage of each treatment was 387.6-593.7 mm, the RCI was the smallest, and the COI was the largest; (2) The annual average GWF under FSI, WSI, COI and RCI were 386.3, 420.6, 431.2 and 273.1 mm, respectively; (3) The percentage of blue, green, and gray WF were 6.0% ~ 24.0%, 31.8% ~ 58.0%, 37.3% ~ 54.0%, respectively, and the green WF is the largest, and the blue WF and GWF are the smallest under RCI, whose structure is more in line with the requirements of rice water saving and pollution reduction.【Conclusion】Comparing the evaluation indicators under the traditional and WF frameworks, it is crucial to consider drainage and GWF into the water use efficiency evaluation of paddy fields, and RCI was the highly efficient irrigation measures. This study can provide theoretical basis and practical reference for comprehensive evaluation of the relationship between agricultural production and water resources and optimization of efficient irrigation measures in paddy fields. |
| Key words: grey water footprint, paddy, irrigation measure, water saving and pollution reduction |
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