播前种子处理.大豆播种之前,必须进行种子粒选。通过粒选,除去霜霉、褐斑、紫斑病粒、虫食粒、青秕粒。用粒大饱满的种子播种,对幼苗早期生长有利。因为大豆的子叶(两个豆瓣)是幼苗养分的主要来源。种子挑选之后,最好进行发芽试验,生命力旺盛的种子在得到适当的温度、水分和氧气之后3天,就会有90～95％冒出“芽”来,这样的种子才适于作种。 Pre-sowing seed treatment. Sowing seeds before the seed must be selected. By particle selection, removal of downy mildew, brown spots, purpura tablets, worm food tablets, barley tablets. Sowing seeds with ample plumpness will benefit early seedling growth. Because soybean cotyledons (two watercress) is the main source of seedling nutrients. After the seeds have been picked, it is best to germinate and test the viable seeds. After three days of proper temperature, moisture and oxygen, 90 to 95% of the seeds emerge and the seed is suitable for seed.