Comprehensive remediation method of 2-methyl-4-chlorophenoxyacetic acid herbicide contaminated soil in tobacco-rice rotation zones

Abstract

The invention relates to a comprehensive remediation method of 2-methyl-4-chlorophenoxyacetic acid herbicide contaminated soil in tobacco-rice rotation zones, belonging to the remediation technology of contaminated soil. The method is characterized by deeply ploughing the 2-methyl-4-chlorophenoxyacetic acid herbicide contaminated soil after preceding crops are harvested, and digging big holes, turning down the upper layer soil and applying 1500-1900kg / ha of biomass carbon before succeeding crops are transplanted; and spraying degrading bacterium SE08 liquid, wherein the concentration of the liquid is 1.5*1011cfu / L and the dosage is 40-60mL / hole. Through combined utilization of biological measures and physical measures, the effect of relieving phytotoxicity is good, so that the tobacco botanical growth environment of the contaminated soil returns to normal.

Description

technical field [0001] The invention relates to a restoration technology for soil polluted by herbicides, in particular to a comprehensive restoration method for soil polluted by dimethyltetrachloride herbicides in a tobacco-rice rotation area. Background technique [0002] In 1941, P.Pokrny first reported the synthesis method of 2,4-D. In the following year, P.W.Zmmerman and A.E.Hitchcock reported the effect of 2,4-D as a plant growth regulator and herbicide. One of the inventions, so far the herbicide has been officially recognized, and has entered the organic era, followed by the rapid development of 2,4-D, similar varieties have been developed one after another, substituted by different groups on the benzene ring, in 1946 developed dimethyl tetrachloride Herbicides mark the birth of the first organically synthesized herbicides - phenoxycarboxylic acid herbicides. Since 1956, China has used phenoxycarboxylic acid herbicides on a large scale in rice fields and tobacco fie...

AI Technical Summary

Problems solved by technology

Dimethyltetrachloride is a phenoxycarboxylic acid selective herbicide with strong systemic conductivity. It is mainly used for post-emergence stem and leaf treatment. The agent passes through the cuticle and cytoplasmic membrane, and finally conducts to various parts. Parts have different effects on nucleic acid and protein synthesis, inhibit nucleic acid metabolism and protein synthesis at the top of the plant, stop the growth of the growth point, and cannot stretch the young leaves until photosynthesis cannot be carried out normally; the agent transmitted to the lower part of the plant makes the plant The synthesis of nucleic acid and protein in the stem tissue increases, which promotes abnormal cell division, enlarges the root tip, loses the ability to absorb nutrients, causes twisting and deformity of the stem, blockage of the sieve tube, destruction of the phloem, and obstruction of organic matter transportation, thus destroying the normal life of the plant ability, eventually leading to plant death

According to actual experiments, the effect of using this method alone is not very obvious

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