Preparation method and application of secondary salinized soil remediation bacterial agent

Abstract

The invention discloses a preparation method and application of a secondary-salinization soil remediation microbial inoculum, wherein the secondary-salinization soil remediation microbial inoculum consists of a freeze-dried bacillus megaterium strain fermentation broth and a protective agent; specifically, the bacillus megaterium is bacillus megaterium NCT-2 which is preserved in China General Microbiological Culture Collection Center with preservation number of CGMCC No.4698; and the protective agent is any one or any combinations of sucrose, mannitol, Tween 80, glycerol, skimmed milk powder, sorbitol, starch, L-sodium glutamate, maltodextrin, glucose and trehalose. The invention is simple in technology and low in cost, and a finished product is convenient to carry, good in performance quality and is capable of effectively reducing nitrate content in soil, increasing organic matter content in the soil and effectively improving the yield and the quality of vegetables. The freeze-dried microbial inoculum has a broad prospect in the remediation of secondary-salinization soil of greenhouse vegetables.

Description

technical field

[0001] The invention relates to a restoration technology in the technical field of soil microorganisms, in particular to a preparation method and application of a microbial agent for restoration of secondary salinized soil of facility vegetables. Background technique

[0002] Due to the long-term application of chemical fertilizers, especially nitrogen fertilizers in agricultural production, which exceeds the needs of plants and accumulates in plants and soil, and unreasonable soil management, the secondary salinization of soil is a dilemma faced by my country's agricultural production. On the one hand, secondary salinization of soil will lead to the accumulation of nitrate on the soil surface, which will affect the growth and yield of crops; source pollution; finally, the nitrate in the plant enters the human body, which seriously causes death, and also synthesizes carcinogenic compounds that affect human health. At present, the methods used to restore seco...

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