非充分灌溉条件下春小麦三水利用效果研究

Effects of 3 Water Use on Spring Wheat Under the Condition of Deficit Irrigation

在非充分灌溉条件下,采用不同的灌水次数和不同的灌水定额进行灌溉试验,考虑灌水与无灌水2个因素,对春小麦的水分利用系数及水分生产率进行研究。结果表明,生育期土壤水和灌溉水所产生的效果对于小麦在80%以上,土壤水和降水对春小麦产量的影响是不可忽略的。从而进一步揭示和明确了灌溉水、土壤水、降水的价值,使几种水对作物产生的效果得到客观的评价。在干旱条件下水分利用率高是以牺牲产量为代价,在实际生产中应结合考虑各因素进行优化利用。

This paper carries on the irrigation experiment under the deficit irrigation condition-different irrigation times and different irrigation quota, considers irrigation and none irrigation two factors. The experiment has 3 treatments, 27 experiment plots in order to research moisture content utilization index and the efficiency of water production of spring wheat. The result indicates that soil water and irrigation water is beyond 80 % in growing period to spring wheat yield, and the precipitation and soil water can not be ignore to the wheat yield. Thereby it reveals and assesses the value of precipitation, irrigation water and soil water. In arid condition, the high moisture content utilization ratio is under the risk of decreasing yield, in practice, we should combine with the other factors to optimize and utilize.