调亏灌溉条件下秦王川灌区苜蓿种植效益初步分析

The Primary Benefit Analysis of Alfalfa Grown under Regulated Deficit Irrigation in Qinwangchuan Irrigation Region

从高产、优质和高效的三重目标出发，在甘肃秦王川灌区通过大田试验初步分析了调亏灌溉条件下苜蓿的种植效益。结果表明：在轻度水分亏缺下，即土壤含水率为60％～65％田间持水量时苜蓿的产量和经济效益较充分灌溉（土壤含水率为65％～70％田间持水量）没有显著差异（P〉0.05），而苜蓿的水分利用效率、粗蛋白含量与其余各处理间存在显著差异（P〈0.05），且值均达到了最大，分别达2．10kg／m^2和13406．7ug／g。

Based on field experiment the benefit of growing alfalfa under regulated deficit irrigation （RDI） was analyzed primarily in Qinwangchuan irrigation region in order to obtain high yield, high quality and high efficiency. The results show that the yield and economic net benefits of alfalfa were not significantly （P〉0.05） different between the light water deficit,which soil moisture maintained at 60%-65% of field capacity and full irrigation which soil moisture maintained at 65%-70% of field capacity. The water use efficiency（WUE） and crude protein of alfalfa were deficit and other treatments. And the above two 13406.7 ug/g respectively. significantly different（P〈0.05） between the light water indexes reached to the maximum with 2. 10 kg/m^3 and 13406.7ug/g respectively.