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亏缺灌溉对石羊河流域主要作物产量和耗水量的影响

作  者:
胡志桥;马忠明;包兴国;张久东
单  位:
甘肃省农业科学院土壤肥料与节水农业研究所;甘肃省农业科学院
关键词:
亏缺灌溉;水分利用率;灌水效益
摘  要:
采用固定灌溉次数和时间、调整不同生育期灌水定额的方法,研究了亏缺灌溉对石羊河流域春小麦、春玉米、制种油葵、色素辣椒和小麦/玉米等5种作物的产量和耗水量的影响。结果表明,对春小麦、制种油葵和色素辣椒进行亏缺灌溉时,可以在少量减产(4.1%~10.1%)的情况下,分别减少耗水量118.9 mm6、6.4 mm和142.3 mm,提高水分利用率27.4%、15.9%和24.7%,提高灌水效益24.7%、22.6%和36.4%。对春玉米和小麦/玉米带田进行亏缺灌溉时,分别减少耗水量121.9 mm和207 mm,提高水分利用率-6.6%和0.2%,提高灌水效益21.7%和28%,但会造成大幅减产,与充分灌溉相比,产量分别减少30%和20%。
译  名:
Effect of RDI on Yield and Water Consumption of Major Crops in Shiyang River Area
作  者:
HU Zhi-qiao1,2,MA Zhong-ming1,BAO Xing-guo1,ZHANG Jiu-dong1(1.Fertilizer and Saving-water Institute,Gansu Agriculture Academy,Lanzhou 730070,China;2.College of Resource and Environment,Northwest Agriculture and Foresty University,Yanglin 712100,Shaanxi Province,China)
关键词:
regulated deficit irrigation;WUE;irrigation benefit
摘  要:
Through adopting the experimental method with same irrigation schedule and adjusting irrigation quota in different growth stage,the effects of regulated deficit irrigation(RDI) on the yield and water consumption of 5 kinds of crops,namely spring wheat,spring maize,sunflower,pimiento and wheat/maize intercrop,are studied in this paper.The results show that the RDI decreases the yields of spring wheat,sunflower and pimiento about 4.1% to 10.1%,but it effectively decreases the water consumption about 118.9 mm,66.4 mm and 142.3 mm,increases WUE about 27.4%,15.9% and 24.7%,increases irrigation benefit about 24.7%,22.6% and 36.4%,respectively.For maize and wheat/maize,the RDI decreases the water consumption about 121.9 mm and 207 mm,increases WUE about 6.6% and 0.2%,and increase irrigation benefit 21.7% and 28%,respectively.But it significantly decreases yield about 30% and 20%,respectively,compared to the control treatment.

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