Application method of cadmium reducer

An application method and technology of a cadmium-reducing agent are applied in the fields of land preparation method, botanical equipment and method, application, etc., which can solve the problems of promotion limitation, large application amount, and high cost, and achieve the improvement of farmers' income, high concentration of active ingredients, and barrier properties. good effect

Inactive Publication Date: 2019-03-26
HUNAN RICE RES INST
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

There are many kinds of soil remediation agents, but they are mainly applied in the field. This method of application requires a large amount of application and high cost, which limits the promotion

Method used

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  • Application method of cadmium reducer
  • Application method of cadmium reducer
  • Application method of cadmium reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Taking the late rice experiment in 2017 as an example, a plot test was carried out in Wangcheng District (total cadmium: 0.62mg / kg, pH: 6.2) in Changsha, Hunan Province. The plot area was 30 square meters, and each treatment was repeated 3 times. The plot was divided by 20cm high field ridge , Field ridges were covered with film to prevent water, fertilizer, and cadmium-reducing agents from cross-linking between treatments, and a water seedling throwing test was adopted. The cadmium-reducing agent tested is a cadmium-reducing microbial agent and soil conditioner developed by a biological company.

[0024] Treatment 1: 5 kg / mu of microbial cadmium-reducing agent in the field;

[0025] Treatment 2: 40kg / mu of soil conditioner for field application;

[0026] Treatment 3: Sprinkle the microbial cadmium-reducing agent on the 561-hole seedling tray (the weight of the seedling tray is 2-2.5kg after adding the substrate), and the amount of the microbial cadmium-reducing agent ...

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Abstract

The invention provides an application method of a cadmium reducer, and belongs to the technical field of heavy metal contaminated land restoration. The application method comprises the following steps: mixing the cadmium reducer with a seedling growing substrate, sowing crop seeds in the obtained seedling growing substrate containing the cadmium reducer, and transplanting every seedling and an area of the substrate having a distance of 1-3 cm to the seedling in field after seedlings emerge. The method changes original field basal application to application in the seedling growing substrate, soeffective components of the cadmium reducer are distributed surrounding plant roots, and are transferred with the transplanting of the seedlings, and the cadmium reducer is distributed surrounding the plant roots in the whole growing period of the plant growth to block and reduce the absorption of cadmium by the roots, thereby the content of cadmium in the plants is reduced by 60.16-67.31%, and the application amount of the cadmium reducer is about 80% less than that of conventional methods.

Description

technical field [0001] The invention belongs to the technical field of land restoration polluted by heavy metals, and in particular relates to a method for applying a cadmium reducing agent. Background technique [0002] The deterioration of the quality of the agricultural ecological environment and the pollution of agricultural and livestock products have become prominent problems facing my country's agriculture. At present, my country's cultivated land is severely polluted by cadmium, and lightly and moderately polluted soil occupies a large proportion. Whether agricultural products that meet national standards can be produced on such cultivated land is an urgent problem to be solved. Since February 2013, there have been media reports on the problem of cadmium exceeding the standard in rice in my country, which has aroused widespread concern in the society. The problem of heavy metals exceeding the standard has also been found in vegetables and other crops one after anothe...

Claims

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Application Information

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IPC IPC(8): A01B79/02A01G22/05A01G22/22A01G24/00
CPCA01B79/02A01G22/05A01G22/22A01G24/00
Inventor 滕振宁方宝华张玉烛刘洋匡炜
Owner HUNAN RICE RES INST
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