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Method for restoring farmland soil polluted by medium-low-concentration mercury through crop rotation of cotton and Indian mustard

A technology of Indian mustard and mercury pollution, applied in the field of low-concentration mercury-contaminated farmland soil, can solve the problems of difficult migration of mercury, hinder mercury migration, etc., and achieve the effect of facilitating absorption, promoting absorption, and promoting transfer

Active Publication Date: 2019-04-16
YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there is a strong mechanism that hinders mercury migration between plant roots and other tissues, and mercury absorbed by roots is difficult to migrate to other tissue parts of plants

Method used

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  • Method for restoring farmland soil polluted by medium-low-concentration mercury through crop rotation of cotton and Indian mustard
  • Method for restoring farmland soil polluted by medium-low-concentration mercury through crop rotation of cotton and Indian mustard
  • Method for restoring farmland soil polluted by medium-low-concentration mercury through crop rotation of cotton and Indian mustard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Restoration plants: Select cotton and Indian mustard as restoration plants, and the planting method is cotton-Indian mustard rotation.

[0035] 2. Restoration object: Select an area in Zhejiang with an average total mercury content of 0.68mg·kg -1 , the farmland soil with a soil pH of 6.3 was used as the remediation object.

[0036] 3. Preparation of reagents: use indolebutyric acid and naphthaleneacetic acid to prepare a concentration of 20mg L -1 The mixture of indolebutyric acid and naphthalene acetic acid, the concentration is 25, 30, 35mg L -1 gibberellin solution.

[0037] 4. Test method and result:

[0038] (1) Set up experimental plots on mercury-contaminated farmland, each plot 16m 2 , each treatment was replicated three times, the planting density of cotton was 50 plants per plot, and the transplanting density of Indian mustard was 150 plants per plot.

[0039] (2) At the beginning of June, before planting cotton, sprinkle 0.075kg·m -2 The fulvic acid...

Embodiment 2

[0059] 1. Restoration plants: Select cotton and Indian mustard as restoration plants, and the planting method is cotton-Indian mustard rotation.

[0060] 2. Restoration object: Select an area in Zhejiang with an average total mercury content of 0.68mg·kg -1 , the farmland soil with a soil pH of 6.3 was used as the remediation object.

[0061] 3. Preparation of reagents: use indole butyric acid and naphthalene acetic acid to prepare concentrations of 8, 20, and 85 mg·L -1 The mixture of indolebutyric acid and naphthalene acetic acid, the concentration is 25, 30, 35mg L -1 gibberellin solution.

[0062] 4. Test method and result:

[0063] (1) Set up experimental plots on mercury-contaminated farmland, each plot 16m 2 , each treatment was replicated three times, the planting density of cotton was 50 plants per plot, and the transplanting density of Indian mustard was 150 plants per plot.

[0064] (2) At the beginning of June, before planting cotton, sprinkle 0.075kg·m -2 Th...

Embodiment 3

[0093] 1. Restoration plants: Select cotton and Indian mustard as restoration plants, and the planting method is cotton-Indian mustard rotation.

[0094] 2. Restoration object: Select an area in Zhejiang with an average total mercury content of 0.68mg·kg -1 , the farmland soil with a soil pH of 6.3 was used as the remediation object.

[0095] 3. Preparation of reagents: use indolebutyric acid and naphthaleneacetic acid to prepare a concentration of 20mg L -1 The mixture of indolebutyric acid and naphthalene acetic acid, the concentration is 25, 30, 35mg L -1 gibberellin solution.

[0096] 4. Test method

[0097] (1) Set up experimental plots on mercury-contaminated farmland, each plot 16m 2 , each treatment was replicated three times, the planting density of cotton was 50 plants per plot, and the transplanting density of Indian mustard was 150 plants per plot.

[0098] (2) At the beginning of June, one day before planting cotton, sprinkle 0.075kg·m -2 The fulvic acid is ...

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Abstract

The invention discloses a method for restoring farmland soil polluted by medium-low-concentration mercury through crop rotation of cotton and Indian mustard. The method comprises the steps of spreading fulvic acid into the farmland soil with the total mercury content between 0.3-3 mg.kg<-1>, and then conducting ploughing; cultivating the cotton, and watering roots of cotton seedlings with a mixedaqueous solution containing indolebutyric acid and naphthylacetic acid; after the cotton is ripe, harvesting the cotton; then spreading fulvic acid, and conducting ploughing; cultivating the Indian mustard, and watering the Indian mustard with a mixed aqueous solution containing indolebutyric acid and naphthylacetic acid; after the Indian mustard is ripe, harvesting the Indian mustard; conductingmultiple seasons of crop rotation until the total mercury content of the farmland soil polluted by mercury is smaller than 0.3 mg.kg<-1>. By means of the method, the absorption of mercury in the soilby the cotton and the Indian mustard is significantly improved, transfer of the element mercury in the roots to the overground parts is effectively promoted, and then the efficiency of restoring the farmland soil polluted by mercury is greatly improved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a method for remediating farmland soil polluted by medium and low concentrations of mercury by using cotton and Indian mustard in crop rotation. Background technique [0002] my country has a large area of ​​cultivated land polluted by heavy metals. According to the results of the "National Soil Pollution Survey Bulletin" published by the Ministry of Environmental Protection in 2014, the rate of mercury pollution points exceeded the standard by 1.6%. Mercury is a non-essential toxic heavy metal element for the human body. After entering the human body, it can damage the human nerves, kidneys and reproductive system. Due to the great harm to human health, mercury is listed as a priority pollutant by the World Health Organization. Mercury in the soil can be enriched in the human body through the food chain, so mercury-contaminated soil is considered to be one of the main ...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 徐灿灿刘锐陈吕军
Owner YANGTZE DELTA REGION INST OF TSINGHUA UNIV ZHEJIANG
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