黑龙江省西部半干旱区大豆不同水肥因素效应试验研究

Water and Fertilizer Effects on Soybean in Semi-arid Western Region of Heilongjiang Province

在3种土壤水分和3种施肥水平耦合作用下,研究不同水肥组合对大豆在分枝、开花期、结荚期、鼓粒期4个生育阶段叶片面积、生物产量和水分利用效率的影响。结果表明:大豆的产量和叶面积均与土壤水分含量正相关,产量以中肥高水耦合最高;结荚期和鼓粒期的水分利用效率与产量密切相关,其中鼓粒期的大豆叶片水分利用效率最大。不同水分条件下,高水的水分利用效率最大,不同肥力条件下,中肥的水分利用效率最大。

In the mutual actions of low.medium.high soil moisture and low,medium,high fertilize application, the effects of soil water and fertilizer coupling on the leaf area and grain yield of soy bean are studied. The result shows that the leaf area and grain yield are positive correlation with soil water level, the highest grain yield is obtained in high soil water and medium fertilizer application; water use efficiency is close correlation with grain yield and the highest water use efficiency level is obtained in high water level in different water level and the highest water use efficiency level is obtained in medium fertilizer application in different fertilizer level.