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autogenesis nitrogen fixer
自生固氮微生物
自生固氮微生物
是指在土壤中能够独立进行固氮的微生物,其中,多数是一类叫做自生固氮菌的细菌。自生固氮菌大多是杆菌或短杆菌,单生或对生。经过两三天的培养,成对的菌体呈“8”字形排开,并且外面有一层厚厚的荚膜。自生固氮菌中,人们应用的最多的是圆褐固氮菌。