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Method for cyclically repairing cadmium-contaminated rice field and planting rice

A technology for cadmium pollution and paddy fields, applied in botany equipment and methods, rice cultivation, soil preparation methods, etc.

Inactive Publication Date: 2017-05-10
湖南润丰达生态环境科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The purpose of the present invention is to address the above problems and provide a method for cyclically repairing cadmium-contaminated paddy fields and planting rice, effectively solving the problem of cadmium pollution in paddy fields, improving soil performance, and increasing the economic value of land during the restoration period

Method used

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  • Method for cyclically repairing cadmium-contaminated rice field and planting rice
  • Method for cyclically repairing cadmium-contaminated rice field and planting rice

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Experimental program
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Effect test

Embodiment 1

[0089] Test site: Tianhua Village, Qingshanpu Town, Changsha County, Hunan Province.

[0090] Test varieties: early rice - Xiangzao 143, late rice - Jinyou 207.

[0091] Test plan: 2 treatments were set up in the test, and 6 areas were equally divided into 6 areas in the same plot. Each treatment was randomly repeated 3 times, and each treatment was about 1 mu. The experiment uses the experimental method to compare with the traditional planting method.

[0092] Experimental treatment and test method:

[0093] Experimental group: Treatment 1, applying a method of the present application to cyclically repair cadmium-contaminated paddy fields and plant rice;

[0094] Contrast group: treatment two, traditional planting method;

[0095] The experimental group was treated as follows:

[0096] 1. Preliminary preparation for the test

[0097] 1. Planting base selection: the base selects farmland with a heavy metal cadmium content below 0.5mg / kg, where rice is planted all year rou...

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Abstract

The invention discloses a method for cyclically repairing a cadmium-contaminated rice field and planting rice. A typical southern rice planting area with the soil heavy metal grade III (according to the evaluation method of the soil environment quality standard value GB 15618-1995) is selected, and the method comprises the following steps that 1, repairing is carried out, wherein an activation agent is applied into the planting area, hyperaccumulator is planted, and heavy metal cadmium is extracted through plants; 2, monitoring is carried out, wherein the content of the heavy metal cadmium in the planting area is dynamically monitored, and whether the planting area is suitable for rice planting or not is judged according to the content; 3, planting is carried out, wherein after the monitoring value reaches the standard, a passivator is applied, and rice planting is carried out; 4, cadmium content monitoring is carried out before each batch of rice is planted, after the cadmium content reaches the standard, the third step is executed, and if the cadmium content does not reach the standard, the first step is executed. According to the method for cyclically repairing the cadmium-contaminated rice field and planting the rice, the problem about rice field cadmium contamination is effectively solved, soil performance is improved, and the economic value of land in a repairing period is increased.

Description

technical field [0001] The invention relates to the restoration of heavy metal pollution in the environment, and relates to the removal of cadmium pollution in paddy fields, in particular to a method for circularly repairing cadmium-polluted paddy fields and planting rice. Background technique [0002] At present, the remediation technologies for heavy metal pollution in farmland in various countries in the world mainly include physical, chemical, biological, agroecological and joint remediation technologies, etc., as follows: [0003] 1. Physical restoration technology [0004] 1. Engineering measures: mainly by foreign soil, soil replacement, deep plowing and so on. Excavated soil and soil replacement are mainly used to relocate heavily polluted areas such as industrial and mining factories (generally cadmium content ≥ 1.0ppm). The measures of alien soil and soil replacement have the advantages of thoroughness and stability, but the amount of engineering is huge, the inve...

Claims

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Application Information

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IPC IPC(8): A01G16/00A01B79/02A01G22/22
CPCA01B79/02A01G22/22
Inventor 黄逸强何安乐周长虹
Owner 湖南润丰达生态环境科技有限公司
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