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Method for reducing heavy metal cadmium in plants

A heavy metal and plant technology, applied in the fields of environmental protection and agriculture, can solve problems such as insufficient soil remediation ability, and achieve the effects of improving soil texture and aeration, reducing absorption, and reducing salt bridges.

Active Publication Date: 2020-01-03
绍兴市农业科学研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the above-mentioned problems and provide a method for reducing heavy metal cadmium in plants;

Method used

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  • Method for reducing heavy metal cadmium in plants
  • Method for reducing heavy metal cadmium in plants
  • Method for reducing heavy metal cadmium in plants

Examples

Experimental program
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Effect test

Embodiment 1

[0029] S1 preparation of soil conditioner

[0030] S11 Preparation of cadmium-resistant bacteria liquid

[0031] Put the bacterial strains of the genus Copper greedy bacteria into the beef extract peptone culture solution to make a bacterial suspension, and cultivate them at 25°C-30°C for more than 18 hours before use.

[0032] S12 Preparation of Biochar

[0033] The straw is cracked at a high temperature of 700°C to form straw charcoal.

[0034] S13 Mix biochar and cadmium-resistant bacteria liquid at a mass ratio of 4:1 and dry at 40°C to make a soil conditioner.

[0035] S2 Sieve the cadmium-contaminated soil, apply soil conditioner at 2% to 3% of the mass of the cadmium-contaminated soil, adjust the water content to 60%-80% of the field water holding capacity, and sow plants in the cadmium-contaminated soil.

[0036] After S3 sowing, spray the inhibitor on the leaves of the plants at least once, dilute it 100-200 times and then spray it by atomization. The principle is ...

Embodiment 2

[0039] This example is basically the same as Example 1, except that the biochar and the cadmium-resistant bacteria liquid in the soil conditioner are mixed at a mass ratio of 2:1. In this example, the inhibitor and control agent is organic silicon foliar fertilizer produced by Hebei Silicon Valley Chemical Co., Ltd. / Hebei Silicon Valley Fertilizer Co., Ltd., and the Zn content is not less than 700g / L.

Embodiment 3

[0041] This example is basically the same as Example 1, except that the biochar and the cadmium-resistant bacteria liquid in the soil conditioner are mixed at a mass ratio of 1:1. In this embodiment, the inhibitor and control agent is a trace element water-soluble fertilizer manufactured by Omes Agricultural Fluid Co., Ltd., UK.

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Abstract

The invention belongs to the technical fields of environmental protection and agriculture, and relates to a method for reducing heavy metal cadmium in plants. The method for reducing heavy metal cadmium in the plants contains the following steps: applying a soil conditioner into cadmium-contaminated soil, mixing the soil conditioner and the cadmium-contaminated soil evenly, and then sowing seeds in the cadmium-contaminated soil to plant the plants; after the seeds are sown, spraying a resistance control agent at least once; and the soil conditioner is produced by mixing at least biochar and acadmium-tolerant bacterium solution and conducting drying. The method is applied for reducing the content of heavy metal in the soil and the content of heavy metal in the plants, through combined remediation of the biochar and cadmium-tolerant bacteria, a function of the cadmium-tolerant bacteria of fixating heavy metal, especially heavy metal cadmium, in the soil can be further enhanced, and heavy metal absorption of the plants is reduced.

Description

technical field [0001] The invention belongs to the technical fields of environmental protection and agriculture, and in particular relates to a method for reducing heavy metal cadmium in plants. Background technique [0002] The heavy metal cadmium has high toxicity and strong chemical activity, and it is easier to enter the plant body than other heavy metals, and it will cause harm to the plant body after a large amount of accumulation. When the cadmium content in the plant reaches 1mg / kg, it will show a series of unsuitable symptoms, and the plant biomass will decrease or even die. Due to its strong mobility and bioavailability, cadmium is easily enriched by plants in the soil plant ecosystem, enters the human body through the food chain, and accumulates in the human body, thereby endangering human health. Moreover, with the increasing seriousness of heavy metal pollution in farmland soil, the interference of heavy metal stress on the utilization of crop nutrient element...

Claims

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Application Information

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IPC IPC(8): B09C1/10B09C1/00
CPCB09C1/00B09C1/10B09C2101/00
Inventor 孙叶芳张奇春杨萌邢海闻秀娟
Owner 绍兴市农业科学研究院
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