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Fertilization process for reducing chromium content of rice in paddy field

A technology for chromium content and rice is applied in the field of farmland soil remediation, which can solve problems such as adverse human health and increased chromium content in rice, and achieve the effects of reducing bioavailability, reducing chromium content, and reducing chromium content.

Inactive Publication Date: 2022-05-13
GUANGXI WEIBANG ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a fertilization process used in rice fields to reduce the chromium content of rice, which solves the problem that the increase of chromium content in rice is not conducive to human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The embodiment of the invention provides a fertilization process for rice field to reduce the chromium content of rice, comprising the following steps:

[0022] S1. Fertilization before rice transplanting: before rice transplanting, add heavy metal remover and purified water to the paddy field, which can dissolve the heavy metal pollutants in the soil and release the heavy metals in the paddy field into the purified water, then discharge the sewage containing heavy metals into the paddy field, and then spray the organic remediation fertilizer mixture on the ground of the paddy field, with the fertilization amount of 60kg / mu, The organic remediation fertilizer mixture is the fertilizer with the mass ratio of organic fertilizer to inorganic fertilizer of 3:2. After the application is completed, the ground of rice field is covered with new soil, and rice seedlings can be transplanted after adding purified water again; By dissolving the heavy metal remover and purified water ...

Embodiment 2

[0029] The embodiment of the invention provides a fertilization process for rice field to reduce the chromium content of rice, comprising the following steps:

[0030] S1. Fertilization before rice transplanting: before rice transplanting, add heavy metal remover and purified water to the paddy field, which can dissolve the heavy metal pollutants in the soil and release the heavy metals in the paddy field into the purified water. Then discharge the sewage containing heavy metals into the paddy field, and then spray the organic remediation fertilizer mixture on the ground of the paddy field, with the fertilization amount of 100kg / mu, The organic remediation fertilizer mixture is the fertilizer with the mass ratio of organic fertilizer to inorganic fertilizer of 3:2. After the application is completed, the ground of rice field is covered with new soil, and rice seedlings can be transplanted after adding purified water again; By dissolving the heavy metal remover and purified water...

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PUM

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Abstract

The invention provides a fertilization process for reducing the chromium content of rice in a paddy field, and relates to the technical field of farmland soil remediation. The fertilization process comprises the following steps: adding a heavy metal remover and purified water into a paddy field, spraying an organic remediation fertilizer mixture to the ground of the paddy field, and completely covering the ground of the paddy field with new soil after the application is completed; applying a mixture of a nitrogen-phosphorus-potassium fertilizer and an organic repairing fertilizer in a mass ratio of 1: 2 every 7-14 days. A heavy metal removing agent and purified water are dissolved in soil, heavy metal, especially chromium, in the soil is dissolved and adsorbed and discharged out of the paddy field along with water flow, the chromium metal content in the paddy field is reduced, meanwhile, a large amount of pollution-free new soil covers the surface layer of the polluted soil, and the cadmium concentration in the soil is reduced to be lower than the critical hazard concentration; meanwhile, the contact between plant root systems and cadmium is reduced, so that the purpose of reducing the chromium content of the rice is achieved.

Description

technical field [0001] The invention relates to the technical field of farmland soil remediation, in particular to a fertilization process for rice fields to reduce the chromium content of rice. Background technology [0002] In recent years, with the development of China's industry, cadmium contained in smoke, waste gas and waste water discharged by industrial and mining enterprises has entered the water and soil, causing serious cadmium pollution in some areas. The mining and smelting of metal mines will cause the content of heavy metals in the surrounding areas to exceed the standard. In the mining of metal mines, untreated acidic wastewater containing a large amount of cadmium ions enters rivers and soil, causing pollution. In the long-term open stacking process of some smelting waste residues, heavy metal tailings and slag, heavy metals diffuse to the surrounding soil and affect the ecological environment. For example, the content of heavy metals such as CD in the chromium s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/10
CPCB09C1/08B09C1/10B09C2101/00
Inventor 蒋志科陈宇钢李峻罗煜峰
Owner GUANGXI WEIBANG ENVIRONMENTAL TECH