Compound fertilizer for repairing cadmium contaminated soil as well as preparation method and application of compound fertilizer

A technology for cadmium-contaminated soil and compound fertilizer, applied in the field of contaminated soil remediation, can solve problems such as unsatisfactory remediation effect, and achieve the effects of easy large-scale promotion, low cost, good stability and environmental friendliness
CN104844375AInactive Publication Date: 2015-08-19INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
Publication Date
2015-08-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a compound fertilizer for repairing cadmium contaminated soil. The compound fertilizer comprises nitrogen, phosphorus and potassium nutrition components and appropriate proportions of agricultural nitric acid rare earth, waste catalyst agent, humic acid mineral powder, meerschaum, plant ash, kaolin and zeolite components. When the compound fertilizer is applied to the cadmium contaminated soil, under the synergistic action of the components, the cadmium in the soil is effectively passivated and fixed, and meanwhile the contaminated soil is effectively repaired, so that the activity of the cadmium in the soil is significantly reduced, the compound fertilizer is beneficial for reducing the absorption of cadmium by crops, and then the cadmium content in the crops is significantly reduced. The compound modifier provided by the invention is relatively good in stability and environment-friendliness, does not generate secondary pollution, and is low in cost and easy to popularize in a large area, and when applied to the cadmium contaminated soil, the applied amount is only 10-200kg / hm<2>, and the cadmium content in the crops can be significantly reduced to reach a national edible safety standard.
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Description

technical field

[0001] The invention relates to a compound fertilizer for repairing cadmium-contaminated soil, a preparation method and application thereof, and belongs to the technical field of contaminated soil repair. Background technique

[0002] With the rapid development of industry and the continuous increase of agricultural input intensity, a large number of heavy metals and other pollutants have entered the soil environment, which has caused heavy metal pollution in soil and has become a worldwide problem that has been widely concerned. According to reports, the cultivated land area polluted by cadmium, mercury, arsenic, chromium and lead in my country is nearly 20 million hm 3 , accounting for about 20% of the country's total arable land, has seriously affected the development of modern agriculture and social stability.

[0003] The pollution of heavy metals in the soil directly leads to excessive heavy metal content in agricultural products, and then enters the h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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