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在毛主席革命路线指引下,为了不断更新紫云英根瘤菌株,发挥优良菌株的增产作用,我们在1968年初筛出12株根瘤菌的基础上,于1972～1973年继续进行筛选工作,从中选出了“38D”、“50A”两株较好的菌株,并于1973年冬到1974年春,以当前生产上应用的“6601”菌株作对照,进一步对“38D”、“50A”、“A16”(从外省引进的优良菌株)作了结瘤性能、固氮能力观察和多点田间施用效果试验。试验结果表明,“38D”菌株要比其他几个菌株具有更多的优越性。因此,将“38D”菌株定为1974年生产紫云英根瘤菌肥的新菌株,
Under the guidance of Chairman Mao’s revolutionary line, in order to constantly update the Ziyun Ying rhizobium strain, to play a role of increasing the yield of superior strains, we screening 12 Rhizobia in early 1968, based on the screening in 1972 to 1973 to continue, from Two strains, “38D” and “50A”, were selected and compared between the winter of 1973 and the spring of 1974. The “6601” A16 “(excellent strains introduced from other provinces) made nodulation performance, nitrogen fixation ability and more field application effect test. The test results show that ”38D“ strains have more advantages than several other strains. Therefore, the ”38D" strain was set as a new strain for producing Ziyunny rhizobium fertilizer in 1974,