自生固氮菌的分离鉴定

The Isolation and Identification of Abiogenous Azotobacter

从非豆科作物根际土壤中分离筛选得到 ２１３ 个在无氮培养基上能良好生长的菌株，通过酶活测定，从中筛选得到 １８ 株固氮能力较强的菌株，并对其中酶活最高的 ４ 株菌株进行了鉴定，结果表明它们属于固氮菌科的不同属。利用它们可望制成适合于不同农作物生长的生物复合肥。

strains,which can subsist on non\|nitric medium,were isolated from the foot soil of non\|leguminous crops.Through determining their nitrogen\|fixation enzyme activity,18 strains,whose enzyme activity was stronger,were found in these strains and were identified as azotobacteraceae sp.They will be made into microbial fertilizer to fertilize different crops.