nitrogen-fixing bacteria

After the clean water irrigation for 3 years or 30 years, the Shannon index of nitrogen-fixing bacteria population diversity increased respectively, but the population structure did not reconvert entirely.

改清灌3a和改清灌30a土壤固氮细菌种群shannon指数分别略有增加，但种群结构并没有得到完全恢复。

Effects of different conservation tillage on amount and distribution of soil ammonifying bacteria, nitrobacteria and nitrogen-fixing bacteria

不同保护性耕作措施对三种土壤微生物氮素类群数量及其分布的影响

The population diversities and enrichment of nitrogen-fixing bacteria were higher than others in Nanjiang and Xingwen.

南江和兴文两地的固氮细菌种群丰富,其多样性和丰富度指数均较大.

10 bacterial isolates were isolated from paddy soil and vegetable-growing field with nitrogen-free Ashby medium. They have been confirmed to have nitrogenase activities and identified to be the nitrogen-fixing bacteria by means of gas chromatography test.

用阿什比无氮培养基从水稻土、菜园土中筛选出10株菌，经气相色谱测定，选出的菌株具有固氮酶活性，初步鉴定为固氮菌；