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Plant efficient remediation method for cadmium standard-exceeding soil of sunlight greenhouse

A restoration method, greenhouse cadmium technology, applied in the field of soil restoration, can solve problems such as low restoration efficiency, achieve the effect of light and simplified restoration process, increase absolute amount, and highlight restoration efficiency

Inactive Publication Date: 2020-07-10
VEGETABLE RES INST OF SHANDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Phytoremediation is an effective way to reduce the content of cadmium in soil. It has attracted much attention because of its greenness, safety, and pollution-free. However, the remediation efficiency of this method is low, and it takes decades or even hundreds of years to remediate heavily polluted soil.
This is because the predecessors mainly focused on the screening of pure cadmium hyperaccumulator plants, and did not pay enough attention to the improvement of cadmium activity in solar greenhouse soils, resulting in low remediation efficiency, and the existence of an excessively high ratio of inactive cadmium has become a constraint for phytoremediation of cadmium-contaminated soil. important limiting factor

Method used

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  • Plant efficient remediation method for cadmium standard-exceeding soil of sunlight greenhouse

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The cadmium activator includes 3 parts by weight, 3 parts of glucose, 12 parts of ammonium bicarbonate, 15 parts of urea, 300 parts of sulfur powder, 60 parts of humic acid, 0.3 part of Bacillus megaterium, and 0.3 part of Bacillus subtilis.

[0026] Cadmium activator preparation method:

[0027] (1) According to the above-mentioned parts by weight, glucose, ammonium bicarbonate, urea, sulfur powder, and humic acid were respectively taken, then fully pulverized, passed through a 60-80 mesh sieve, and sieved and mixed uniformly to obtain a mixture;

[0028] (2) adding Bacillus megaterium and Bacillus subtilis to the mixture of step (1) and fully mixing;

[0029] The Bacillus megaterium microbial inoculum used in all the examples was purchased from the China Agricultural Microorganism Culture Preservation Management Center (No. .

[0030] (3) adjusting the mixture of step (2) to water content with distilled water is 8%;

[0031] (4) Carry out granulation by extruding g...

Embodiment 2

[0034] The cadmium activator includes 1.5 parts of glucose, 10 parts of ammonium bicarbonate, 10 parts of urea, 200 parts of sulfur powder, 50 parts of humic acid, 0.3 part of Bacillus megaterium, and 0.2 part of Bacillus subtilis in parts by weight.

[0035] (1) According to the above-mentioned parts by weight, glucose, ammonium bicarbonate, urea, sulfur powder, humic acid are respectively taken, then fully pulverized, passed through a 60-80 mesh sieve, and sieved and mixed uniformly to obtain a mixture; Bacillus megaterium, Bacillus subtilis are added in the mixture of step (1) and fully mixed;

[0036] (2) The Bacillus megaterium microbial inoculum used in all the examples was purchased from the China Agricultural Microorganism Culture Collection and Management Center (No. Culture Collection Management Center.

[0037] (3) adjusting the mixture of step (2) to water content with distilled water is 8%;

[0038] (4) Carry out granulation by extruding granulator, particle dia...

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Abstract

The invention belongs to the field of soil remediation, and particularly relates to a plant efficient remediation method for cadmium standard-exceeding soil of a solar greenhouse. A cadmium activatingagent is applied to to-be-remediated soil for blending, then corn is planted, soil is irrigated before corn plants are harvested, then the whole plants are pulled out, and remediation of the to-be-treated soil can be achieved. According to the invention, 20-80g of the cadmium activating agent is added into every 1kg of the to-be-remediated soil (in terms of dry soil). Plant (corn) planting and the cadmium activating agent are adopted to jointly restore soil, conversion of the cadmium element in the invalid state of the sunlight greenhouse soil into the available state is improved, accordingly, the plant restoration efficiency is improved, and technical supports are provided for food safety, people health and social stability.

Description

technical field [0001] The invention belongs to the field of soil remediation, and specifically relates to a high-efficiency plant remediation method for soil with excessive cadmium in solar greenhouses. Background technique [0002] Cadmium is one of the five most dangerous substances in environmental pollution. As a persistent toxic pollutant, it cannot be decomposed after entering the soil environment. After entering the human body through various channels, it accumulates in the human body. mutagenic effect. The 2014 "National Soil Pollution Survey Bulletin" pointed out that the overall soil quality in my country is not optimistic. Within the scope of the surveyed areas, up to 16.1% of the samples exceeded the environmental quality standards, among which cadmium exceeded the standard rate of 7%, ranking first higher than other heavy metals. The vegetable production environment in the solar greenhouse is special, with the characteristics of large input of agricultural ma...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/00B09C1/10
CPCB09C1/08B09C1/10B09C1/105
Inventor 孙凯宁岳耀权杨宁温丹王晓王克安张浩然
Owner VEGETABLE RES INST OF SHANDONG ACADEMY OF AGRI SCI
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