Agricultural microbial agent with nitrogen-fixing, phosphorus-dissolving, potassium-dissolving and cellulose-dissolving functions and preparation method thereof

Abstract

The intention belongs to the field of microbial agents, and relates to an agricultural microbial agent with nitrogen-fixing, phosphorus-dissolving, potassium-dissolving and cellulose-dissolving functions, the agricultural microbial agent comprises the following components in percentage by mass: 20-30% of aspergillusniger fermentation product, 10-20% of azotobacter powder, 15-25% of trichodermareesei fermentation product and 10-20% of trichodermaharzianum fermentation product. 1-5% of carbohydrate, 1-5% of white carbon black and 1-5% of at least one of amino acids and polypeptides; The method comprises the following steps: firstly, mixing solid raw materials with an inorganic salt solution containing cane sugar and then sterilizing to prepare a sterile culture medium; inoculating aspergillusniger spore powder, trichodermaharzianum spore powder and trichodermareesei spore powder into a sterile culture medium for fermentation; and finally, uniformly mixing the amino acids or polypeptideswith the aspergillusniger fermentation product, the trichodermaharzianum fermentation product, the trichodermareesei fermentation product, the azotobacter powder, the carbohydrate and the white carbonblack. The microbial agent provided by the invention can activate beneficial elements such as phosphorus, calcium and the like in soil while rapidly decomposing straw in the soil, and fix nitrogen inair, so that the purpose of promoting crop growth is achieved.

Description

technical field [0001] The invention belongs to the technical field of microbial bacterial agents, and in particular relates to an agricultural microbial bacterial agent with functions of nitrogen fixation, phosphorus, potassium, and cellulose decomposing and a preparation method thereof. Background technique [0002] Straw and plant residues are the by-products of the crop production process, which contain organic matter, nitrogen, phosphorus, potassium and trace elements, among which the organic matter content is the majority, but the organic matter in the straw is mainly cellulose, hemicellulose and lignin Most of them have the most cellulose content. Cellulose is mainly composed of glucose connected by β-1,4 glycosidic bonds, which need to be hydrolyzed into glucose by cellulase to be directly used by cells. The cellulose effectively used by humans in nature accounts for only a small part of the total cellulose, and most Most cellulose is not used by humans. [0003] A...

AI Technical Summary

Problems solved by technology

However, the current domestic agricultural microbial agents use a single strain of bacteria, lack of diversity in function, and low decomposition efficiency, and most of them use the original powder of bacteria, which need to grow into hyphae after germination, and then express various enzymes to decompose For large organic compounds, this process may take several days

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