Bacterium for degrading herbicide acifluorfen-sodium and application of bacterium

Abstract

The invention discloses a bacterium for degrading a herbicide acifluorfen-sodium and application of the bacterium. The bacterium for degrading acifluorfen-sodium is Enterobacter sp. ZCF1643, which is preserved in China General Microbiological Culture Collection Center by a preservation number of CGMCC No.7774. The enterobacter sp. ZCF1643 CGMCC No.7774 reaches a degrading rate of 63.47% on 25mg / L of acifluorfen-sodium in an organic salt culture medium within 7 days, showing that the strain can effectively degrade the acifluorfen-sodium; the bacterium has a wide application prospect in an aspect of repairing acifluorfen-sodium pollution of soil.

Description

technical field [0001] The invention relates to a bacterium for degrading herbicide weed burn and its application. Background technique [0002] Weed grass fire, also known as acifluorfen, English name acifluorfen, chemical name 5-(2-chloro-α,α,α-trifluoro-p-tolyloxy) 2-nitrobenzoic acid, the structure is as shown in formula 1 Show: [0003] [0004] Weed burning is a diphenyl ether herbicide, a contact herbicide, and a protoporphyrin oxidase inhibitor. Usually, 25% water agent is used for pre-emergence surface soil treatment of soybeans and post-emergence spraying through leaves, which can effectively control broad-leaved weeds in soybean fields such as cocklebur, velvetleaf, nightshade, amaranth, quinoa, polygonum, morning glory, ragweed, mangosteen, etc. Tuola, purslane, iron amaranth, ghost needle grass, weasel petal flower, commelina, etc., early post-emergence treatment can also control annual grass weeds including foxtail. After spraying, soybeans will be damage...

AI Technical Summary

Problems solved by technology

The extensive use of herbicides has greatly saved labor costs and improved agricultural production efficiency, but it has also brought some ecological problems such as agricultural production and environmental pollution.

Weed incineration has a short half-life and is generally considered a low-toxic, environmentally friendly pesticide. However, in recent years, frequent, excessive or improper use has caused varying degrees of pollution to farmland soil and groundwater, and is harmful to subsequent crops. also getting worse

Studies have shown that weeds can remain in the soil for several months, and can remain in groundwater and surface water for several years. They have an inhibitory effect on soil microorganisms, are highly toxic to fish, and are very polluting to the environment.

[0006] The degradation of herbicide residues in nature is mainly accomplished by microorganisms in the soil, but the natural degradation is very slow

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