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Method for repairing cadmium (Cd) contaminated soil through french marigold-maize intercropping

A technology of cadmium-contaminated soil and peacock grass, which is applied in the field of soil remediation, can solve the problems of long repair period and achieve the effects of reducing Cd content, promoting enrichment, and inhibiting absorption

Inactive Publication Date: 2019-05-28
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, phytoremediation technology also has limitations, and the repair period is long. If agricultural production needs to be interrupted, farmers will lose income, which is not in line with my country's national conditions. Significantly affect the safe production of crops, thereby fully mobilizing the enthusiasm of farmers to participate in governance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Use the following restoration steps to repair the test field, the steps are:

[0029] (1) In the middle of the test field in spring, plant malacock grass seedlings and corn seedlings. Interpenetrate each other as a row of malachite grass and a row of corn. The nitrogen, phosphorus and potassium compound fertilizers were topdressed twice on peacock grass and corn at the earing stage. The first fertilization rate was 15 kg / mu, and the second fertilization rate was 20 kg / mu. The interval between the two fertilizations was 5 days. The water rate is controlled at 40% to 60%;

[0030] (2) configure the restoration promoting liquid, pour the repairing promoting liquid on the root of Malacock grass after 1 day after each fertilization, and the watering amount of the repairing promoting liquid once is 100mL / strain;

[0031] (3) Peacock grass and corn are harvested separately when they are mature.

[0032] The repair promoting solution is an aqueous solution of p-hydroxybenzoic...

Embodiment 2

[0038] Use the following restoration steps to repair the test field, the steps are:

[0039] (1) In the middle of the test field in spring, plant malacock grass seedlings and corn seedlings. Interpenetrate each other as a row of malachite grass and a row of corn. The nitrogen, phosphorus and potassium compound fertilizers were topdressed twice on peacock grass and corn at the earing stage. The first fertilization rate was 32 kg / mu, and the second fertilization rate was 16 kg / mu. The interval between the two fertilizations was 5 days. The water rate is controlled at 40% to 60%;

[0040] (2) configure the restoration promoting liquid, pour the repairing promoting liquid on the root of Malacock grass after 1 day after each fertilization, and the watering amount of repairing promoting liquid once is 200mL / strain;

[0041] (3) Peacock grass and corn are harvested separately when they are mature.

[0042] The repair promoting solution is an aqueous solution of p-hydroxybenzoic aci...

Embodiment 3

[0048] Use the following restoration steps to repair the test field, the steps are:

[0049] (1) In the middle of the test field in spring, plant malacock grass seedlings and corn seedlings. Interpenetrate each other as a row of malachite grass and a row of corn. The nitrogen, phosphorus and potassium compound fertilizers were topdressed twice on peacock grass and corn at the earing stage. The first fertilization rate was 40 kg / mu, and the second fertilization rate was 8 kg / mu. The interval between the two fertilizations was 5 days. The water rate is controlled at 40% to 60%;

[0050] (2) Configure the repairing promoting liquid, and after 1 day after each fertilization, the root of the peacock grass is irrigated with the repairing promoting liquid, and the once watering amount of the repairing promoting liquid is 300mL / strain;

[0051] (3) Peacock grass and corn are harvested separately when they are mature.

[0052] The repair promoting solution is an aqueous solution of p...

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PUM

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Abstract

The invention discloses a method for repairing cadmium (Cd) contaminated soil through french marigold-maize intercropping. The method comprises the repairing steps that (1) french marigold seedlings and maize seedlings are intercropped[A1] in farmland soil contaminated by cadmium in spring[A2], and fertilization and irrigation are regularly carried out; (2) repairing accelerating liquid is prepared, and the repairing accelerating liquid is irrigated to roots of the french marigold 1-2 days after the fertilization is carried out every time; and (3) the ripe french marigold and maize are correspondingly harvested; and the repairing accelerating liquid is an aqueous solution of p-hydroxybenzoic acid, glycine, potassium nitrate and a grapestone-rhubarb compound extract. According to the methodfor repairing the cadmium contaminated soil through the french marigold-maize intercropping, the intercropping of the french marigold and the maize is utilized, and the prepared repairing accelerating liquid is utilized to carry out irrigation treatment for the french marigold,[A3] so that the content of Cd in the french marigold is significantly higher than the content of Cd in monocropping french marigold or the intercropping condition without the irrigation of the repairing accelerating liquid, and the content of Cd in corn is lower than the content of Cd in monocropping corn.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a method for remediating cadmium-contaminated soil with peacock grass-corn intercropping. Background technique [0002] In recent years, the extensive use of industrial products and synthetic materials has led to a sharp increase in the types and concentrations of heavy metals in the environment. Heavy metal toxicity has become one of the most important abiotic stresses that inhibit plant growth and development. Cadmium (Cd) is an important industrial and agricultural raw material. Due to the extensive use of chemical fertilizers and pesticides in agriculture and the irrigation of cadmium-containing sewage, many soils are polluted. Cd is one of the most easily absorbed and transported heavy metals by plants. Lower concentrations can also cause a lot of harm to plants, such as activating or inhibiting enzyme activity by substituting sulfhydryl groups on protei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G22/60A01G22/20A01B79/02B09C1/00
Inventor 李林翟佳豪陈文洪刘小昌廖海荣曾志高荆晓玲王玲
Owner JIANGXI NORMAL UNIV
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