MICROORGANISM PREPARATION AND ITS APPLICATION FOR PROMOTING THE YIELD INCREASE AND QUALITY IMPROVEMENT OF GRAIN CROPS

The invention belongs to the technical field of agriculture and forestry, and particularly relates to a microbial agent for promoting yield increase and quality improvement of grain crops and application thereof. The microbial agent is prepared by mixing a saccharomycetes liquid, a bacillus subtilis liquid, a trichoderma liquid and a paenibacillus polymyxa liquid according to a mass ratio of (1-2): (10-20): (5-10): (10-20), by fermenting and purifying. The saccharomycetes, the bacillus, the trichoderma and the paenibacillus polymyxa are mixed for use, the synergistic interaction effect of all the strains is fully exerted, the soil quality is improved by utilizing the metabolism effect of microorganisms, the growth of grain crops is promoted, and the yield and the fruit quality of the grain crops are improved.