多年田间试验和调查研究结果表明,紫云英种子产量的主要构成性状是主茎、低节位大分枝及其有效小分枝上的花荚;高节位小分枝一般对种子产量不起作用;低节位花序的结荚数、每荚实粒数和千粒重等均明显高于中、高节位,对种子产量起主导作用.开花期间如天气晴好、气温较高,以及放养蜜蜂等,都能提高结实率和种子产量. Years of field trials and research results show that the main components of the seed yield of Astragalus sinicus is the main stem, low-node large branches and the effective small branches of the flower pods; high-node small branches generally can not afford the seed yield The number of pods, the number of seeds per pod and the weight of 1000-grain per plant were significantly higher than that of the middle and high nodes, which played a leading role in the yield of seeds.If the flowering period was fine, the temperature was high and bees were stocked , Can improve seed setting rate and seed yield.