一、前言花生是我省的主要油料作物,栽培面积与产量均居全国之首。自1950年我省就开始花生根瘤菌的试验和示范推广,至1957年先后八年间共推广施用根瘤菌肥料的面积达1,700余万亩,且效果比较稳定。但自1958年以后,因菌肥生产中断,迄今已五、六年未能继续使用。据前人的研究,菌种在人工保存的条件下,容易发生变異,甚至退化无效。原菌种是否有效?能否恢复生产制造花生根瘤菌肥料?这是要研究的第一个问题。 First, the preface Peanut is the main oil crops in our province, cultivation area and output rank first in the country. Since 1950, peanut rhizobia began to be tested and demonstrated in our province. Until 1957, a total of 1,700 million mu of rhizobium fertilizer was promoted and applied in eight years, and the effect was relatively stable. However, since 1958, due to the interruption of the production of fertilizer, it has not been used for five or six years. According to previous studies, strains in the artificial preservation of conditions, prone to mutation, or even degenerate ineffective. Is the original strain effective? Can the production of peanut rhizobium be resumed? This is the first question to be studied.