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Compound fertilizer for reducing heavy metal pollution in soil and preparation method

A heavy metal and compound fertilizer technology, which is applied in the field of compound fertilizer, can solve the problems of low fertilizer utilization rate and low heavy metal Cd barrier rate, and achieve the effects of improving fertilizer utilization rate, improving soil fertility, and preserving soil nutrients

Inactive Publication Date: 2018-09-18
徐学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a compound fertilizer that reduces heavy metal pollution in the soil, which solves the problems of low barrier rate to heavy metal Cd and low fertilizer utilization rate in existing compound fertilizers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A compound fertilizer for reducing heavy metal pollution in soil. The raw materials include by mass: 60 parts of nitrogen fertilizer, 40 parts of base fertilizer, 30 parts of potassium fertilizer, 20 parts of phosphate fertilizer, 20 parts of straw, 15 parts of peanut bran, 10 parts of compound passivation agent, bentonite 10 parts, inhibitor control agent 5 parts, potassium humate 5 parts.

[0026] The nitrogen fertilizer is a mixture of ammonium nitrate and ammonium sulfate in a mass ratio of 2:3.

[0027] Potassium fertilizer is potassium chloride.

[0028] Phosphate fertilizer is a mixture of calcium superphosphate and diammonium phosphate in a mass ratio of 1:3.

[0029] The composite passivator is a mixture of lime nitrogen, zeolite powder and charcoal activated carbon in a mass ratio of 1:2:5.

[0030] The resistance control agent is a mixture of silicon dioxide, hydrogen phosphate and amine compounds in a mass ratio of 1:2:1.

[0031] Amine compounds include ...

Embodiment 2

[0038] A compound fertilizer for reducing heavy metal pollution in soil. The raw materials include by mass: 90 parts of nitrogen fertilizer, 60 parts of base fertilizer, 40 parts of potassium fertilizer, 40 parts of phosphate fertilizer, 30 parts of straw, 20 parts of peanut bran, 20 parts of compound passivation agent, bentonite 20 parts, inhibitor control agent 15 parts, potassium humate 10 parts.

[0039] The nitrogen fertilizer is a mixture of ammonium nitrate and ammonium sulfate in a mass ratio of 2:3.

[0040] Potassium fertilizer is a mixture of potassium chloride and plant ash in a mass ratio of 1:1.

[0041] Phosphate fertilizer is a mixture of calcium superphosphate and diammonium phosphate in a mass ratio of 1:3.

[0042] The composite passivator is a mixture of lime nitrogen, zeolite powder and charcoal activated carbon in a mass ratio of 1:2:5.

[0043] The resistance control agent is a mixture of silicon dioxide, hydrogen phosphate and amine compounds in a mas...

Embodiment 3

[0051] A compound fertilizer for reducing heavy metal pollution in soil. The raw materials include by mass: 75 parts of nitrogen fertilizer, 50 parts of base fertilizer, 35 parts of potassium fertilizer, 30 parts of phosphate fertilizer, 25 parts of straw, 18 parts of peanut bran, 15 parts of compound passivation agent, bentonite 15 parts, inhibitor control agent 10 parts, potassium humate 8 parts.

[0052] The nitrogen fertilizer is a mixture of ammonium nitrate and ammonium sulfate in a mass ratio of 2:3.

[0053] Potassium fertilizer is a mixture of potassium chloride and plant ash in a mass ratio of 1:1.

[0054] Phosphate fertilizer is a mixture of calcium superphosphate and diammonium phosphate in a mass ratio of 1:3.

[0055] The composite passivator is a mixture of lime nitrogen, zeolite powder and charcoal activated carbon in a mass ratio of 1:2:5.

[0056] The resistance control agent is a mixture of silicon dioxide, hydrogen phosphate and amine compounds in a mass...

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Abstract

The invention discloses a compound fertilizer for reducing heavy metal pollution in soil and a preparation method. The preparation method comprises the following steps: mixing a base fertilizer, a compound passivator, bentonite, and potassium humate, performing carbonization on a mixture in an anaerobic condition, and enabling a carbonized organic substance to mix with straw and peanut bran, stacking after watering; performing fermentation on the stacked mixture, after the fermentation, uniformly mixing with raw materials of a nitrogenous fertilizer, a potash fertilizer, a phosphatic fertilizer and a retarder according to a component ratio, to obtain the compound fertilizer for reducing the heavy metal pollution in the soil. Through the coordinated regulation of the compound passivator andthe retarder, an obstruction rate of crops to a heavy metal Cd in absorption can be improved, soil nutrient can be reserved, and a utilization rate of the fertilizer is improved.

Description

technical field [0001] The invention belongs to the technical field of compound fertilizers, and relates to a compound fertilizer for reducing heavy metal pollution in soil, and also relates to a preparation method suitable for acidic soil compound fertilizers. Background technique [0002] Heavy metals cannot be biodegraded. Once they enter the soil, they will remain for a long time and accumulate continuously. They will be absorbed by crops and enter the food chain, endangering human health. According to the report of the State Environmental Protection Administration, at present, the area of ​​farmland polluted by heavy metals such as cadmium, lead, and arsenic in my country is nearly 20 million hectares, accounting for about 1 / 5 of the total cultivated land area. With the acceleration of industrialization, the area of ​​soil polluted by heavy metals is increasing and the degree of pollution is increasing. Leafy vegetables are the most susceptible to heavy metal pollution...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05B1/02C05G3/00C05G3/80C05B7/00C05C1/00C05C3/00C05C7/00C05D1/02C05D9/00C05F5/002C05F11/00C05F11/02C05D1/00
Inventor 徐学
Owner 徐学
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