黑河中游春小麦产量与水分利用效率研究

Study on the Yield and Water Use Efficiency of Spring Wheat in Middle Reaches of Heihe River Desert Oasis

为了确定黑河中游地区的最佳灌溉制度,研究了不同灌溉定额下春小麦的株高、叶面积指数、地上干物质累积量和产量及其构成要素的变化,并对水分利用效率、耗水量和产量进行了相关性分析。结果表明,不同灌溉处理间,春小麦的株高、叶面积指数、干物质累积量在各个生育期的变化速率和增长量有明显差异,且产量及构成要素之间呈现显著性差异。水分利用效率与产量之间呈二次曲线关系。420mm是该地区春小麦的最佳灌溉量。

In order to determine the optimum irrigation scheme, the field experiments for different irrigation schedules were established to study on the changes of the plant height, leaf area index （LAI）, dry matter accumulation, grain yield, constituent elements of spring wheat and the relation among WUE, water consumption and yield was analyzed. The result showed that the significant differences among different irrigation conditions existed in the spring wheat plant height, leaf area index and dry matter accumulation rate in each growth period, and the yeild and the elements also had significant differences. There was a good quadratic curve relationship between WUE and yield. The schedule of W4 （420 mm） was the optimum irrigation schedule for the spring wheat in the desert oasis.