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A method of controlling cabbage polluted by heavy metal cadmium and lead in soil

A heavy metal and lead pollution technology, applied in the restoration of polluted soil, soil preparation methods, horticultural methods, etc., can solve the problems of Cd and Pb compound pollution, etc., without affecting soil physical and chemical properties and fertility, simple technical approach, and control effect Good results

Active Publication Date: 2020-12-08
GUANGDONG UNIV OF EDUCATION
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Problems solved by technology

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for controlling soil heavy metal cadmium lead pollution of Chinese cabbage, to solve the problem of Cd and Pb compound pollution in Chinese cabbage planting

Method used

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  • A method of controlling cabbage polluted by heavy metal cadmium and lead in soil
  • A method of controlling cabbage polluted by heavy metal cadmium and lead in soil
  • A method of controlling cabbage polluted by heavy metal cadmium and lead in soil

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Effect test

Embodiment 1

[0026]The effect of intraspecific intercropping of cabbage cultivars with low Cd accumulation (49CX) and high Cd accumulation (CLW) on Cd and Pb accumulation.

[0027]The test soil was taken from ordinary farmland, and the basic chemical properties of the soil were studied by conventional methods (Nanjing Institute of Soil Science, Chinese Academy of Sciences, 1978). Among them, the physical and chemical properties of the soil and the content of heavy metals are shown in Table 1. According to the environmental assessment standard for the production area of ​​edible agricultural products in my country (HJ332-2006), the maximum limit of Cd content in vegetable soil is 0.3mg / kg, and the maximum limit of Pb content is 50mg / kg. Therefore, the test soil is Cd and Pb contaminated soil. .

[0028]Table 1 Physical and chemical properties of tested soil

[0029]

[0030]Soil preparation: the soil is air-dried, crushed, sieved, and 0.857g NH is added per 1kg of soil3NO3And 0.544g KH2PO4As a base fertilize...

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Abstract

The invention discloses a method for controlling soil heavy metal cadmium and lead pollution of Chinese flowering cabbage. The method selects Chinese flowering cabbage varieties with different cadmiumaccumulation ability, and intercropping and planting a low-accumulation cadmium Chinese flowering cabbage variety and a high-accumulation cadmium Chinese flowering cabbage variety; the low-accumulation cadmium Chinese flowering cabbage variety is sijiu Chinese flowering cabbage, and the high-accumulation cadmium Chinese flowering cabbage variety is green king oil blue sweet Chinese flowering cabbage. The method can effectively reduce the content of Cd and Pb of both sides of the intercropping; the safety is high, exogenous materials does not need to be added, and the possibility of secondarypollution is avoided; the soil disturbance is small, and the physical and chemical properties and fertility of the soil are not affected; the cost is low, the operability is strong, special materials,equipment and cultivation techniques are not needed, and the method is suitable for wide planting.

Description

Technical field[0001]The invention relates to the technical field of agricultural planting, in particular to a method for controlling soil heavy metal cadmium and lead pollution of cabbage core.Background technique[0002]Soil heavy metal pollution and the resulting food safety problems are becoming more serious and attracting attention. It is estimated that millions of tons of toxic heavy metals are released into the environment each year (Nriagu JO, Pacyna JM. Quantitative assessment of worldwide contamination of air, water and soils by tracemetals. Nature, 1988, 333: 134-139). The National Soil Pollution Status Survey Bulletin (2014) shows that Cd and Pb are the main pollutants of cultivated land in my country. Soil heavy metal pollution will inevitably threaten the safety of agricultural products. Leafy vegetables usually absorb more accumulated Cd and Pb. The excess rates of Cd and Pb in Guangdong vegetables are 21.2% and 19.7%, respectively, which pose a greater risk to human he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G22/15A01G7/06A01B79/02B09C1/00
CPCA01B79/02A01G7/06B09C1/105
Inventor 龚玉莲陈爱葵曾碧健廖晓丹廖燕红邱丘谢婕杜云燕陈彩峰薛梦
Owner GUANGDONG UNIV OF EDUCATION
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