| 引用本文: | 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,():-. |
|
| 摘要: |
| 【目的】为全面揭示稻田水资源利用效用，优选高效灌排模式，通过观测浅水勤灌（FSI）、浅湿灌溉（WSI）、控制灌溉（COI）和蓄水控灌（RCI）下稻田水肥迁移过程，本文结合水足迹与用水效率指标，分析了灌溉措施对稻田排水、灰水足迹及其水分利用效率的影响。【结果】受不同灌溉措施的影响，稻田排水、灰水足迹及其水分利用效率均存在差异。2017-2018年各处理稻田排水量为387.6~593.7 mm，RCI最小，而COI最多。FSI、WSI、COI、RCI下水稻灰水足迹的年均值分别为386.3、420.6、431.2、273.1 mm。蓝、绿、灰水足迹的组成比例分别为6.0% ~ 24.0%、31.8% ~ 58.0%、37.3% ~ 54.0%，且RCI下绿水足迹最大、蓝水足迹和灰水足迹均最小，其用水结构更符合水稻节水减污的要求。【结论】对比传统和水足迹框架下农业水资源评价指标，将田间排水及灰水足迹考虑入稻田水分利用效率评价至关重要，且蓄水控灌为综合灰水足迹和水分效率下的高效灌溉措施。本研究可为全面评价农业生产与水资源关系和优选稻田高效灌溉措施提供理论依据和实践参考。 |
| 关键词: 灰水足迹、用水效率、灌溉措施、节水减污，水稻 |
| DOI： |
| 分类号:S271 |
| 基金项目:国家自然科学基金(51979074)；江苏省自然科学基金(BK20221504) |
|
| Effects of irrigation practices on drainage, grey water footprint and water use efficiency in paddy fields |
|
Xiao JIanfeng,Wu Mengyang,Tang Shuhai,et al
|
|
1.Hohai University;2.Lian Shui Water Conservancy Research Institute
|
| 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 |
