经过 3年试验 ,就大豆种子使用年限对生育性状的影响进行了探讨。认为连续多年种植未提纯复壮的种子造成品种的抗逆性下降是导致产量下降的主要原因。因而 ,坚持经常更换大豆种子十分必要。 After three years of experiments, the effects of soybean seed life on reproductive traits were discussed. It is considered that the main reason for the decline in yield is the decrease in the resistance of breeds caused by planting seeds that have not been purified and rejuvenated for many years in succession. Therefore, insisting on regular replacement of soybean seeds is necessary.