A comprehensive restoration method for dichloroquine phosphate herbicide residues in tobacco fields

Abstract

The invention provides a comprehensive repair method for residual quinclorac herbicide in a tobacco field, and belongs to the technical field of herbicide residual soil treatment and repair. The method comprises the steps of detecting quinclorac in the soil after harvesting grains; deeply harrowing to sun the upturned soil in case of soil exceeding the standard (more than 0.05mg / kg); irrigating water to promote discharging one month before transplanting tobacco seedlings; applying quick lime or dolomite powder to the field surface under proper soil moisture content in order to achieve acid-base neutralization; applying straw biochar or carbon based organic fertilizer to the bottom of the ridge while ridging and fertilizing the flue-cured tobacco in order to physically absorb; spraying the leaf surfaces through a mixed solution of gibberellin (920), monopotassium phosphate and mancozeb or zineb in case of quinclorac chemical injury (the leaves are deformed in rat-tail shape) occurring on the flue-cured tobacco in the resettling stage or vigorous growing stage of the flue-cured tobacco so as to relieve or remove chemical injury. With the adoption of the method, the residual quinclorac in the soil of the tobacco field can be removed; in addition, the acidity of the soil can be reduced; the tobacco soil-borne disease can be prevented; the soil health can be promoted; the tobacco output and quality can be increased.

Description

technical field

[0001] The invention belongs to the field of agriculture, and in particular relates to a comprehensive restoration method for dichloroquine phosphate herbicide residues in tobacco fields. Background technique

[0002] The paddy and dry rotation of tobacco and rice is a typical flue-cured tobacco planting method in southern my country, which has played a huge role in reducing the pests and diseases of the two crops, improving soil fertility, and increasing the income of tobacco and grain. However, with the extensive application of herbicides in paddy fields, especially the extensive application of quinclorac, a highly effective and selective herbicide for controlling barnyard grass, its residues have had a serious impact on the growth and development of subsequent tobacco crops. The main field manifestations are: Tobacco leaves are malformed, yellow and albino, leaf margins roll down, and leaves shrink toward the back, resulting in long and narrow leaves that ...

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