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我們在郑州浅色草甸土壤小麦根际微生物的研究中,两年来重复用蔗糖Ashby氏无氮培养基,用稀释平板法,没有发現Azotobacter大量存在,却发现有大量微嗜氮细菌的存在(由于它們能在极端缺乏氮素化合物的培养基上生长,所以我們认为它是微嗜氮細菌);經鉴定得知为稀有固氮极毛杆菌(Azotomonas insolita)、放射形农田杆菌(Agrobacterium radiobacter)和反硝化极毛杆菌(Pseudomonas denitrificans)三个种
In the study of rhizosphere microbes in the soil of light meadow in Zhengzhou, we repeated the experiment with the medium of nitrogen-free Ashby without sucrose for two years. We found no significant presence of Azotobacter by dilution plate method but found a large number of micro-nitrogen bacteria (We think of it as a micro-azotobacter) due to their ability to grow on media that is extremely deficient in nitrogen compounds; those known to be rare Azotomonas insolita, Agrobacterium radiobacter, And three species of Pseudomonas denitrificans