黑龙江省是我国大豆的主产区 ,常年大豆播种面积 2 33万ｈｍ2 ,占全国大豆播种总面积的三分之一。自 1984年合丰 2 5大豆推广以后 ,黑龙江省大豆主栽品种的生态类型发生了变化 ,主茎型、亚有限结荚类型代替了无限结荚、多分枝类型。根据生产上的需求 ,合江农科所确定了选育亚有 Heilongjiang Province is the main producing area of ​​soybean in our country. The annual sown area of ​​soybean is 23,300 hm2, accounting for one-third of the total sown area of ​​soybean in the country. Since the promotion of Hefeng 25 soybean in 1984, the ecological types of main cultivars of soybean in Heilongjiang Province have changed. The main stem and sub-limited pod types replace the infinite pods and multi-branch types. According to the needs of production, Hejiang Agricultural Science identified the selection of Asian sub