大豆从幼苗生长到籽实成熟,在体内有机物质中,其干物质的95%左右,是通过光合作用制造的。大豆光合产物的多少,取决于光合面积大小,光合能力强弱与光合时间长短这三个因素。而能否积累,积累的多少,则与 Soybean grows from the seedlings to mature seeds, organic matter in the body, about 95% of its dry matter, is manufactured through photosynthesis. Soybean photosynthetic products, depending on the size of photosynthetic area, the ability of photosynthetic capacity and photosynthetic time length of these three factors. And can accumulate, the accumulation of how much, then