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A method for remediating cadmium-contaminated soil with peacock grass-corn intercropping

A technology of cadmium-contaminated soil and peacock grass, which is applied in the field of soil remediation and can solve the problems of long repair period

Inactive Publication Date: 2021-04-30
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-contaminated soil with peacock grass-corn intercropping. The restoration steps include: (1) planting peacock grass seedlings and corn seedlings in the middle of cadmium-contaminated farmland soil in spring, and regularly fertilizing and watering; (2) Configure the repair promoting liquid, and water the repair promoting liquid on the roots of Malacock grass 1 to 2 days after each fertilization; (3) Harvest respectively after Malachite grass and corn are mature; The repair promoting liquid is p-hydroxybenzoic acid, glycine, Aqueous solution of potassium nitrate and grape seed‑rhubarb complex extract. In the present invention, through the intercropping of malachite and corn, the repairing promotion liquid configured by the present invention is used to water malachite, so that the Cd content in malachite is significantly higher than that of the single cropping of malachite or the intercropping without irrigation of the repairing promotion liquid, corn The content of corn kernels was lower than the Cd content of corn kernels in single cropping.

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 Patents(China)
IPC IPC(8): B09C1/00A01G22/60A01G22/20A01B79/02
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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