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微生物肥料能将空气中的氮转化为作物可以利用的氮,能将土壤上难利用的磷、钾转化为易于作物利用的磷、钾[1]。施用微生物肥料代替部分化肥,可以缓解化肥使用不当(特别是氮肥的不合理施用)所带来的地力退化、环境污染及农产品品质下降等负作用[2]。为探明肥力高复合生物固氮菌?
Microbial fertilizers convert nitrogen in the air into nitrogen that is available to the crop, converting phosphorus and potassium, which are difficult to use in the soil, into phosphorus and potassium that are readily available for crops. The use of microbial fertilizers instead of some fertilizers can alleviate the negative effects of degraded fertilizers (especially unreasonable application of nitrogen fertilizers), degradation of the environment, environmental pollution and the decline of the quality of agricultural products [2]. To identify fertile high biological nitrogen-fixing bacteria?