节水灌溉条件下冬小麦耗水结构

对不同灌水次数和灌水量处理的土壤水分变化、耗水结构及作物水分利用率进行分析。结果表明,在综合农艺措施条件下,减少灌溉次数及灌水量,可以明显增加土壤水分消耗,减少冬小麦生育期总耗水量。天津地区春一水、春二水的土壤水分消耗量占总耗水量的比例分别比春三水增加12.1%和7.4%。同时,冬小麦水分利用率分别提高12.7%和10.1%。

Effect of Water Saving Irrigation on Contributions of Different Water Resources in Winter Wheat

A field experiment about the change of soil water,the contributions of different water resources(irrigation water,soil water and rainfall)and the crop water utilization efficiency(WUE)with different type of irrigation in winter wheat was conducted.The results showed that the soil water consumption was in-creased,and the total water consumption decreased with the decrease of the irrigation times and the amount of irrigation.Comparing with the types of three times,one and twice irrigation in spring,the ratio of the soil water consumption in the total water consumption was increased12.1%,7.4%,and the winter wheat water utilization efficiency(WUE)was increased12.7%and10.1%,respectively.