大豆是重要的工业原料之一,我省每年播种面积在1300多万亩,但产量不高,平均亩产仅100多斤。历年来生产实践证明,大豆根瘤菌拌种是稳定而有效的增产措施。而我省使用很瘤菌拌种已中断多年,目前没有推广应用的高效固氮菌种,所以筛选、分离、引进高效固氮菌种,应用于农业生产,提高大豆产量具有现实意义。为此,从1979年开始到1980年,我们在筛选大豆根瘤菌高效固氮菌种的同时,着重研究了由中国农业科学院从美国引进的Sm31和3Ilbllo两个大豆根瘤菌菌种。通过室内砂培结 Soybean is one of the important industrial raw materials. The sown area of ​​our province is more than 13 million mu per year, but the yield is not high, only an average of 100 kilos per mu. Production practice over the years proved that soybean rhizobium seed dressing is stable and effective stimulation measures. However, the utilization of Triticum in our province has been interrupted for many years. Currently, there is no efficient nitrogen-fixing bacteria that are widely used in the province. Therefore, screening, separating and introducing efficient nitrogen-fixing bacteria are of practical significance for agricultural production and soybean production. For this reason, from 1979 to 1980, we screened soybean rhizobia efficient nitrogen-fixing bacteria, at the same time, we focused on the Sm31 and 3Ilbllo two soybean Rhizobium strains introduced by the Chinese Academy of Agricultural Sciences from the United States. Through indoor sand culture knot