豆科作物根瘤菌广泛存在于土壤中,在自然条件下,大多数豆科作物都能结瘤,但土壤中根瘤菌相当分散,不能及时大量浸染豆科作物,而且这些菌株也不一定是有效菌株,所以种植豆科作物需要人工接种根瘤菌。尤其是新种植区,接种可增加结瘤数,提高结瘤率,以更多地固定空气中的氮素,不断满足作物生长需要,以提高产量。我国目前常用的豆科作物根瘤菌接种方法有菌剂拌种和种子丸衣化两种,后者主要用于豆科牧草。菌剂拌种具有简单方便等优点,但接种菌和种子不易粘牢,容易脱落,加之花生、大豆等豆科作物都是子叶先出土,粘在种皮上的接种菌被带出土面后,会遭到阳光、干旱等不良因素的影响而死亡。菌剂拌种和种子丸衣化,其接种菌都在种子周围,并在土壤中缓慢移动.当根系生长超出接种部位时,接种菌就不能对 Leguminosae Rhizobium is widespread in soil and under natural conditions most of the leguminous crops can nodulate, but rhizobia in the soil are quite dispersed and can not be infested in large quantities in time for leguminous crops, and these strains may not necessarily be effective Strain, so planting leguminous crops need artificial inoculation rhizobia. In particular, the new planting areas, inoculation can increase the number of nodules, increase nodulation rate, in order to more fixed nitrogen in the air, continue to meet the needs of crop growth, in order to increase production. At present, the legumes Rhizobium inoculation methods commonly used in our country are two kinds of seed dressing and seed pill-dressing, the latter is mainly used for leguminous pasture. Inoculation bacteria and seeds are not easy to stick firmly, easy to fall, combined with peanuts, soybeans and other legume crops are cotyledons first unearthed, inoculation of the seed coat on the surface of the bacteria were taken out, Will be sunshine, drought and other adverse factors and death. Inoculation of seedlings and seed pills, the inoculation of bacteria are around the seeds, and slowly moving in the soil.When the roots grow beyond the site of inoculation, inoculation bacteria can not be on