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根瘤菌苗圃法,是在大田播种紫云英之前,用苗圃方式,先在一小块地上播种用根瘤菌拌过种的紫云英种子;待苗圃中的紫云英结上根瘤,再将紫云英的根和根瘤切下捣碎,制成菌剂,接种于欲播在大田的紫云英种子上。用苗圃法不仅可以解决紫云英根瘤菌剂不足的问题,而且由于苗圃菌剂的菌体新鲜,活性强,因而增产较果显著。据四块用苗圃根瘤菌试验田的测定,亩产鲜草8,856—10,560斤,比不用根瘤菌的亩产鲜草6,156—9,120斤,每亩多收2,700—1,440斤。
Rhizobium nursery law, before sowing in the field of milk vetch, with nursery way, first sowing in a small piece of ground with rhizobium sparrow mixed seed of milk vetch; The root and nodules of the milk vetch are cut and crushed to form a bactericide and inoculated on the seeds of the milk vetch grown in the field. Nursery method can not only solve the problem of lack of Rhizobium japonicus agent, but also because of the bacteria fresh fungi, activity, and therefore yield more significant. According to the test of four nursery rhizobia test fields, 8,856-10,560 jin of fresh grass per mu were harvested, 6,156-9,120 jin per mu of fresh grass without rhizobia, and 2,700-1,440 jin per mu.