Compound microorganism preparation for preventing and treating rice blast and preparing method of compound microorganism preparation

Abstract

The invention discloses a compound microorganism preparation for preventing and treating rice blast and a preparing method of the compound microorganism preparation. The compound microorganism preparation is prepared from streptomyces tsusimaensis fermentation liquor, syringa oblata streptomycete fermentation liquor, asburiae bacillus fermentation liquor and beautiful Bacillus pumilus fermentation liquor. According to strains of the compound microorganism preparation, rice can be induced to generate disease resistance through the comprehensive utilization of interspecific or intraspecific antibiosis, competition, hyperparasitism and bacteriolysis of microorganisms and through secondary metabolite, various antibiotics such as streptomyces sparsogenes, nonactin and valinomycin can be generated, and a superstrong suppression effect can be generated on pathogenic bacteria of rice blast; the four strains used in the compound microorganism preparation can be directly separated and obtained from soil, all have the root trace growth-promoting effect, can breed and grow on the surfaces of crops or inside plants or in soil while secreting certain secondary metabolite towards the rhizosphere of plants in an orientation mode, and can improve absorption of plants to nutritive substances, stimulate the growth of plants and perform the role of fertilizer.

Description

technical field [0001] The invention belongs to the technical field of agricultural biological control and application of microbial agents, and in particular relates to a compound microbial agent for preventing and treating rice blast and a preparation method thereof. Background technique [0002] Rice blast, also known as rice fever, knocking head blast, etc., is a worldwide fungal disease that has caused great harm to global rice production. Diseases occur in all rice areas in my country, and generally cause a 10% to 20% reduction in production in the year when the disease is prevalent, and a 40% to 50% reduction in production in the year of severe disease, or even no harvest. Since the 1990s, the annual occurrence area of ​​rice blast in my country has been more than 3.8 million hm2, and the annual loss of rice has reached hundreds of millions of kilograms. In terms of production, my country currently mainly uses chemical pesticides to prevent and control rice blast. Gene...

AI Technical Summary

Problems solved by technology

Guo Jianhua et al. disclosed a biocontrol strain JH21 and its biocontrol agent for preventing and treating rice sheath blight and rice blast in Patent No. 2011100743369; Bacillus strains; due to the diversity and simultaneous evolution of pathogenic bacteria, the existing single antagonistic strains cannot achieve ideal control effects due to their single mode of action, unstable control effect, and production and use. Therefore, biocontrol bacteria Many biological functions need to rely on the synergy between two or more strains of bacteria to play a better role