不同灌溉量下春小麦土壤水分变化规律

Soil moisture change of spring wheat field under different irrigation quantity

研究了不同灌水量处理条件下春小麦土壤水分变化规律。结果表明:不同灌水量处理下土壤含水率在垂直方向上的变化规律一致,随着深度的增加,土壤含水率变异系数逐渐变小;在春小麦整个发育期,不同灌水量处理在拔节期耗水强度均达最大值,为其需水高峰期;从节水效益看,全生育期灌水量为428.6 mm的处理水分利用效率和灌溉水利用效率较好,灌溉效果最佳,达到节水灌溉效果。

The main purpose of this article is to show the variation of soil moisture of spring wheat field under the condition of different irrigation treatments.The experimental results show that： the probability of the variation of soil moisture on vertical direction under different irrigation treatments is the same,and the coefficients of variation of the probability of soil moisture become smaller and smaller as the depth increases;At the period of jointing which is in the highest need of water,all of the intensity of water consumption under different irrigation treatments achieve to the maximum during the whole period of spring wheat growth;From water-saving irrigation treatment T3 can obtain the best effect under different irrigation levels,because of the better using water and irrigation water and the best irrigation level.So that it can achieve the effect of water-saving irrigation.