大豆是一种利用价值很高的作物,可惜亩产一般只有二、三百斤,仅为禾谷类作物的三分之一到二分之一。因此,分析大豆低产的原因,找出提高产量的有效途径和关键措施,以较大幅度地提高大豆产量是人们长期的愿望,也是当前大豆生产上急需解决的问题。一、大豆低产的原因是什么? 根据国内外多年的研究结果,大豆低产的主要原因有下列几项: 1.受光体制不良大豆属分枝型阔 Soybean is a highly valuable crop, but generally only two or three hundred jin of mu produce is only one-third to one-half of the cereal crops. Therefore, it is a long-term wish to analyze the causes of low-yield soybean and find out effective ways and key measures to increase yield so as to raise soybean yield more greatly. It is also an urgent problem to be solved in current soybean production. First, the low yield of soybeans what is the reason? According to many years of research results at home and abroad, the main reasons for low yield of soybeans are the following: 1. Poor light-tolerant soybean branchia