Microbial agent based on amine oxide flavobacterium and flavobacterium oryzae as well as preparation method and application of microbial agent

The invention belongs to the field of microorganisms, and particularly relates to a microbial agent based on amine oxide flavobacterium and flavobacterium oryzae as well as a preparation method and application of the microbial agent. The microbial agent comprises mixed fermentation liquor of amine oxide flavobacterium, flavobacterium oryzae and azospirillum brasilense, the effective viable count of the three strains in the mixed fermentation liquor is not lower than 7 X 10 < 8 > CFU/mL, and the infectious microbe rate is not higher than 3%. The microbial agent can be colonized in soil for a long time, has the effects of improving soil fertility and water-retaining property, can secrete plant hormones, and regulates plant growth by promoting plant root growth. 本发明属于微生物领域，具体涉及一种基于氧化胺黄色杆菌和稻黄杆菌的微生物菌剂及其制备方法与应用。本发明微生物菌剂包括氧化胺黄色杆菌、稻黄杆菌和巴西固氮螺菌的混合发酵液，混合发酵液中三种菌株的有效活菌数均不低于7×108CFU/mL，杂菌率不高于3％。本发明提供的微生物菌剂能够在土壤中长期定殖，具有改善土壤肥力和保水性的效果，同时能够分泌植物激素，通过促进植物根部生长而调控植物生长。