Preparation method of liquid composite bacterial strain

Abstract

The invention provides a preparation method of a liquid composite bacterial strain. The bacterial strain comprises azotobacteria, potassium decomposing bacterium, and antibiotic bacterium; wherein the azotobacteria is a bacterium selected from the following bacteria: rhizobium, azotobacter chroococcum, C58/PGV3850 strain of agrobacterium tumefaciens, Hainan rapid growing rhizobium 166, azospirillum Yu-62, associative nitrogen-fixing bacteria Klebsiella planticola 19-1 and azotobacter vinelandii Az230; the potassium decomposing bacterium is a bacterium selected from the following bacteria: NBT strain of silicate bacteria, JF88 stain of potassium bacteria, and G10 strain of silicate bacteria; the antibiotic bacterium is a bacterium selected form the following bacteria: streptomycete, penicillium, bacillus polymyxa and 5406 antibiotic bacterium. The preparation method comprises the following steps: separately selecting one bacterium from the azotobacteria group, the potassium decomposing bacterium group and the antibiotic bacterium group mentioned above; individually preparing corresponding bacterial strain culture mediums, wherein the pH values of the culture mediums are in a range of 6 to 8.5; then individually subjecting the three culture mediums to conventional processes of packaging in pots, sterilizing, cooling, inoculating, and culturing so as to obtain liquid bacterial strains; then mixing the three liquid bacterial strains, wherein the weight ratio of the azotobacteria to the potassium decomposing bacterium to the antibiotic bacterium is 1:1:(0.025 to 0.05). The preparation method meets the requirement of production of nutritionally-balanced compound feed, and has the advantages of little investment, easy mastery, easiness, and low cost.

Description

technical field [0001] The invention relates to a preparation method for liquid composite bacteria, which can be used for the preparation of liquid fertilizer. Background technique [0002] Existing liquid quick-acting compound fertilizers are inorganic fertilizers that are specifically mixed with chemical fertilizers such as nitrogen, phosphorus, and potassium. Because chemical fertilizers have defects such as damaging soil fertility and causing soil compaction, people gradually focus on natural fertilizers that are environmentally friendly, efficient, harmless, and can enhance soil fertility, especially natural fertilizers that have been decomposed. [0003] Liquid compound strains are necessary for the production of natural liquid quick-acting compound fertilizers. The existing liquid compound strains have a single structure and are difficult to meet the requirements for producing nutritionally balanced compound fertilizers. Contents of the invention [0004] The techn...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing liquid composite strains, which overcomes the defects that