Agricultural microbial agent and preparation method thereof

The invention provides an agricultural microbial agent which is prepared from the following components in percentages by weight: 1-10% of beneficial bacteria, 50-90% of corn cob residues, 2-8% of plant ash and 1-10% of gypsum powder. The agricultural microbial agent is good in adsorption effect on beneficial bacteria, easily available in auxiliary material, low in cost and simple in preparation process; after the agricultural microbial agent is applied, the effect is good and the release rate of viable organisms is high, and the agricultural microbial agent can be decomposed by microorganisms, converted into crop nutrients to improve the soil condition, and is safe, free from toxicity and environmentally friendly. 本发明提供了种农用微生物菌剂，包括以下重量百分数的成分：有益菌1-10%，木糖渣50-90%，草木灰2-8%，石膏粉1-10%。本发明的农用微生物菌剂对有益菌吸附效果好，辅料易得、成本低，制备工艺简单；施用后效果好、活菌释放率高，可以被微生物分解，转化为作物营养、改善土壤条件，安全无毒环保。