| Cite this article: | 廖斌,李德荣,熊昱,等.典型稻田灌溉水分生产力和田间水利用系数分析[J].灌溉排水学报,0,():-. |
| Liao Bin,Li Derong,Xiong Yu,et al.典型稻田灌溉水分生产力和田间水利用系数分析[J].灌溉排水学报,0,():-. |
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| Analyzing Irrigation Water Productivity and Application Efficiency of Typical Paddy |
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Liao Bin1, Li Derong1, Xiong Yu2, Yang Xue3, Lv Guoan1
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1.College of Resources Environment of Huazhong Agriculture University;2.Yangtze River Water Resources Protection Research Institute;3.Hubei Province Water Resources and Hydropower Planning Survey and Design Institute
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| Abstract: |
| 【Objective】Analyzing the irrigation water efficiency of typical paddies by irrigation water productivity (IWP) and application efficiency (AE).【Method】A two-years filed experiment with two irrigation methods (AWD: alternate wetting and drying irrigation, CF: flooding irrigation) and three nitrogen levels was conducted in a hilled-paddy and ridge-paddy, and also compared the irrigation water efficiency in different rainfall years (normal flow year: 2015, high flow year: 2016).【Result】Rice yield in F1 is generally lower than F2, and there was no difference in rice yield between F1 and F2 in normal flow year, whereas it is 27.1% lower than F2 in high flow year. Rice yield was not affected by irrigation methods, but the difference between F1 and F2 was decreased with the increase of nitrogen level. In the F2, the AWD irrigation consumed the least irrigation water and obtained the highest IWP, which is 0.22 m3/m2 and 3.97 kg/m3, respectively. However, CF irrigation in F1 consumed the most irrigation water and obtained the lowest IWP. The IWP of F1 was 85.1% and 29.9% higher than F2 in high flow year and normal flow year, respectively. AE was affected by filed type, irrigation method, and rainfall year, and also varied in different rice growth period. The average AE of F1 and F2 were 0.9311 and 0.9347, AWD and CF irrigation were 0.9363 and 0.9296, and the high and normal flow year were 0.9307 and 0.9350, respectively. The AE of F1 and F2 are 0.9311 and 0.9347, AWD and CF irrigation are 0.9363 and 0.9296, and the average and high water years are 0.9307 and 0.9350. lowest AE was 0.9118 which was observed in panicle initiation after mid-season drainage. 【Conclusion】Irrigation water efficiency in ridge-paddy was general higher than hilled-paddy, AWD irrigation could improve irrigation water efficiency (IWP and AE) both in hilled-paddy and ridge-paddy. |
| Key words: Rice, Hilled-paddy, Ridge-paddy, Application;efficiency, Irrigation;water productivity |
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