Method for reducing soil heavy metal cadmium and lead pollution for cabbage heart

A technology of lead pollution and heavy metals, applied in the field of phytoremediation of soil heavy metal pollution, to achieve the effect of strong pertinence, simple operation and short time

Inactive Publication Date: 2009-08-12
SUN YAT SEN UNIV
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AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a method for reducing soil heavy metal cadmium and lead pollution of Chinese cabbage for the problems existing in the control of cadmium and lead pollution in Chinese cabbage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 Screening of cabbage varieties with low Cd accumulation

[0034] This embodiment establishes three experimental groups:

[0035] (1) Control group: the Cd concentration of the test soil is 0.114 mg·kg -1 ;

[0036] (2) Moderate Cd pollution group: the Cd concentration of the tested soil is 0.667mg·kg -1 ;

[0037] (3) Severe Cd pollution group: the Cd concentration of the tested soil is 1.127mg·kg -1 .

[0038] The Chinese cabbage varieties used in this example are purchased from various places, and there are 30 varieties in total, and the test time is May, 2007.

[0039] Respectively select 20 healthy and uniform seeds from the tested cabbage varieties and sow them into the pots with the above three groups of soil respectively. When the seedlings grow to 5 true leaves, thin the seedlings (thinning), and keep 4 plants in each pot. During the test period, the water was regularly watered according to the weather and the growth of the plants, and samples we...

Embodiment 2

[0042] Example 2 Screening of cabbage varieties with low accumulation of Cd and Pb

[0043] This embodiment establishes two experimental groups:

[0044] (1) Slight Cd, Pb compound pollution group: the Cd concentration of the tested soil is 0.373mg·kg -1 , Pb concentration is 24.641mg·kg -1 ;

[0045] (2) Moderate Cd, Pb compound pollution group: the Cd concentration of the tested soil is 0.368mg·kg -1 , Pb concentration is 91.251mg·kg -1 .

[0046] The test time of this embodiment is March, 2008.

[0047] The seeds of 6 Cd low-accumulation cabbage varieties (Cd-PSC) obtained in Example 1 and the seeds of 1 Cd high-accumulation variety were divided into two parts and sowed in the above-mentioned two groups of test soils, until the seedlings grew to When there are 5 true leaves, the seedlings are thinned (thinning), and 4 plants are reserved in each pot. During the test, they are regularly watered according to the weather and plant growth conditions, and samples are taken...

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PUM

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Abstract

The present invention discloses a method for reducing the pollution of heavy metals of cadmium and lead to the cabbage heart. The method comprises the steps of firstly filtering the cabbage heart breed with low accumulation amount of cadmium or lead, and then filtering the cabbage heart breed with low accumulation amount of cadmium and lead from the former cabbage heart breed. The method of the invention can obtain the cabbage heart breed with the Cd and Pb accumulation amount of edible part in the tolerance range of food hygiene standard through two steps of filtering. The harm risk of Cd and Pb in the soil and water environment to the health of human body through cabbage heart is reduced. Furthermore the method of the invention has the advantages of short required time and low cost. The method of the invention can settle the Cd and Pb pollution problem of farmland soil of our country directly, quickly and effectively. The method of the invention also has the advantages of strong pertinence, simple operation, low cost, excellent safety, and suitability for large-area application generalization.

Description

technical field [0001] The invention belongs to the technical field of phytoremediation of soil heavy metal pollution, and in particular relates to a method for reducing soil heavy metal cadmium and lead pollution of Chinese cabbage. Background technique [0002] In recent years, soil pollution, especially heavy metal pollution, has become increasingly serious due to mining and smelting, atmospheric deposition, domestic sewage discharge, sewage irrigation, and extensive use of pesticides and fertilizers. [0003] At present, the area of ​​polluted cultivated land in China is nearly 20 million hm 2 , accounting for about 1 / 5 of the total area of ​​arable land, of which industrial "three wastes" pollute 10 million hm 2 , the area of ​​farmland sewage irrigation is more than 1.3 million hm 2 . Soil heavy metal pollution is often the compound pollution of two or more heavy metals, which has the characteristics of universality and complexity, and the compound pollution is clos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/04A01G1/00B09C1/00
Inventor 杨中艺邱丘袁剑刚周轶慧王宇涛辛俊亮
Owner SUN YAT SEN UNIV
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