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华北农业科学研究所试验一种细菌肥料——花生根瘤菌拌种剂成功,现已在各地推广使用。根瘤菌拌种剂是一种用人工培养的黑色粉状的细菌肥料,成本低廉,适用于花生、绿豆等豆类作物。这种细菌肥料有固氮作用,与种子混合拌匀播种入土,可帮助作物吸取氮肥,因而秧子粗壮,结荚稠密,籽粒饱满,平均可使作物增产20％。1949年该所开始在各地
North China Institute of Agricultural Sciences test a bacterial fertilizer - peanut rhizobium seed dressing success, is now being promoted around the use. Rhizobium seed dressing is a kind of artificial black powdery bacterial fertilizer, which has low cost and is suitable for peanut, mung bean and other legume crops. This bacterial fertilizer has a nitrogen fixation effect. When mixed with seeds, it is mixed and sowed into the soil to help the crops absorb nitrogen fertilizer. Therefore, the seedlings are stout, densely populated and full of grains with an average yield of 20% of the crop. The institute started in 1949