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Method for repairing cadmium-contaminated soil by using crassula agenten thunb

A technology of cadmium-contaminated soil and swallow's palm, applied in the field of soil remediation, can solve the problems of cadmium-contaminated soil remediation, etc.

Active Publication Date: 2020-10-20
HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no technical report on using this plant to remediate heavy metal pollution at home and abroad, and there is no technical report on using this plant to remediate cadmium-contaminated soil

Method used

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  • Method for repairing cadmium-contaminated soil by using crassula agenten thunb

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In this example, the potted simulation experiment method was used to select the 0-20 cm cultivated soil of Henan moderate cadmium pollution farmland. The pH value of the farmland soil is about 7.9, the total cadmium concentration is 2.56 mg / kg, and the effective cadmium is 1.58 mg / kg.

[0023] A method for remediating cadmium-contaminated soil by using swallow palm, the specific remediation method is as follows:

[0024] 1) The cultivated soil is naturally air-dried, broken, and debris removed; 4kg per pot is filled into plastic pots with an upper edge diameter and a height of 18×15 cm. Mix urea, potassium dihydrogen phosphate, and potassium chloride at a ratio of N: P: K mass ratio of 5: 6: 5 to form a compound fertilizer. Add 270 mg of compound fertilizer per kilogram of soil to the pot. Mix and water;

[0025] 2) Cuttings to propagate crallow palms, select strong top branches or thick leaves in mid-March, and dry them in a cool place for one day. The cuttings are placed ...

Embodiment 2

[0029] This embodiment also adopts the potted simulation test method, and all operations refer to Embodiment 1. What is not used is: Step 3) Do not spray plant growth regulators during the growth of the swallow palm plants.

Embodiment 3

[0031] This embodiment also adopts the potted simulation test method, and all operations refer to Embodiment 1. What is not used is: Step 3) During the growth of the swallow palm plant, spray the potting soil once every 35 days to increase the production of the amine 2-(3.4-dichlorophenoxy) triethylamine solution at a spray concentration of 5.3 μg / kg (soil weight).

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Abstract

The invention relates to a method for repairing cadmium-contaminated soil by using crassula agenten thunb, which comprises the following steps: transplanting crassula agenten thunb into cadmium-contaminated soil to-be-treated, applying a plant growth regulator in the crassula agenten thunb growth process, and harvesting or integrally removing the overground parts of the crassula agenten thunb after the repairing is finished. According to the method, the possibility of repairing the cadmium-contaminated soil by utilizing the plants is explored by utilizing the heavy metal tolerance and the hyperaccumulation function of the crassula agenten thunb, and tests prove that the swallow palm can well repair the cadmium-contaminated soil and is good in repairing effect.

Description

Technical field [0001] The invention belongs to the technical field of soil restoration, and specifically relates to a method for repairing cadmium-contaminated farmland soil by using cradle palm. Background technique [0002] my country's current farmland heavy metal pollution points exceed the standard rate of 19.4%. Among all heavy metal pollution, cadmium pollution is the most serious, with a point violation rate of 7.0%. Cadmium is one of the most bio-migrating heavy metals. It is easily absorbed and accumulated by plants. Exceeding a certain limit will not only seriously affect the yield and quality of crops, but also enter the human body through the biological chain, causing serious damage to the liver and kidney functions of the human body. The harm. Countries around the world generally list cadmium as a priority pollutant for prevention and control. Phytoremediation technology is currently an effective method and mainstream direction for the remediation of heavy metal ...

Claims

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Application Information

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IPC IPC(8): B09C1/00
CPCB09C1/105
Inventor 董学亮刘珂珂李中贤王俊伟谢亚雄张祥刘小培刘清余学军
Owner HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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