不同灌溉制度对玉米生长过程中水分利用的影响

Study on Different Irrigation Systems Water Use in Maize Growth

以玉米为试验材料,研究不同灌溉制度对玉米生长过程中水分利用情况的影响。结果表明,土壤水分是影响玉米根系分布的重要指标,早期缺水对玉米根系向土壤深层的延伸程度大于只在玉米生长中期缺水处理;玉米生长前期对水分需求非常旺盛,会直接影响玉米整体生长期,进而影响作物产量;后期水分亏缺,能够提高玉米对水分的利用率,对作物产量影响较小。

Using maize as the experimental materials, the paper studies on the utilization situation, different irrigation system on the water use in the process of maize growth. The results shows that soil moisture is an important index to maize root distribution of maize, early water deficit on root to soil depth extent influenced more than in maize growth period water treatment; water demand is very impor- tant for early maize growth, directly affected the whole growth period, crop yield. Later water deficit, could improve the water use efficien- cy of maize, has little effect on crop yield.