Method for repairing soil heavy metal cadmium pollution through endive-oil sunflower crop rotation mode

A technology for remediating soil and heavy metals, applied in the field of phytoremediation, can solve the problems of low absorption and accumulation of heavy metals, low comprehensive effect of practical application, and low biomass in the above-ground parts, and achieves strong drought resistance, low management costs, and above-ground parts. developed effect

Inactive Publication Date: 2016-09-07
HUNAN AGRICULTURAL UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to, aiming at the deficiencies in the above-mentioned prior art, provide a kind of method that utilizes chicory-oil sunflower rotation mode to remediate soil heavy metal cadmium pollution, to solve the seaso

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  • Method for repairing soil heavy metal cadmium pollution through endive-oil sunflower crop rotation mode
  • Method for repairing soil heavy metal cadmium pollution through endive-oil sunflower crop rotation mode
  • Method for repairing soil heavy metal cadmium pollution through endive-oil sunflower crop rotation mode

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Embodiment 1

[0018] Example 1 Soil remediation test in polluted mining area

[0019] The test site is the farmland polluted by heavy metals in Chenzhou Mining Area, Hunan Province. The soil of the farmland has a heavy metal cadmium concentration of 1.44mg / kg, of which the effective cadmium content is 0.73mg / kg.

[0020] The specific method is as follows: field planting of chicory and oil sunflower (the oil sunflower varieties are G101, G104 and dwarf head, and the chicory variety is General Chicory) in the heavy metal complex polluted area according to its natural growth period, and select The soil layer is deeply loosened to adapt to the land, carry out conventional plowing and fertilization, live-seed chicory and oil sunflower in the polluted soil, take antifreeze measures at the seedling stage, follow-up pest management, and field moisture management, and timely topdressing.

[0021] Sampling was done after the oil sunflower was harvested in the second year. The soil for the test was c...

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Abstract

The invention provides a method for repairing soil heavy metal cadmium pollution through an endive-oil sunflower crop rotation mode. According to the method, endives and oil sunflowers are planted in the soil of heavy metal compound pollution in the endive-oil sunflower crop rotation mode according to the natural growing periods of the endives and the oil sunflowers, and conventional cultivation is conducted. Both the endives and the oil sunflowers can grow normally in the cadmium-polluted soil, no obvious toxic symptom occurs, and the yield of the endives and the oil sunflowers is not influenced. In addition, the biomass of the overground part is large, a large quantity of various heavy metals can be absorbed and accumulated, especially the content of the heavy metal cadmium in the plants is obviously larger than the soil background value, and the enrichment level is reached. By the adoption of the method, cultivation is easy, the management cost is low, the oil sunflowers have quite high edible value and medicinal value, the endives contain a large amount of protein and have quite high feeding value, the heavy metals can be prevented from entering the food chain again through simple treatment, and high economic income can be obtained while pollution treatment is achieved.

Description

technical field [0001] The invention relates to a phytoremediation technology for polluted environment, in particular to a method for remediating heavy metal cadmium pollution in soil by using a chicory-oil sunflower rotation pattern. Background technique [0002] With the deterioration of environmental quality and the increasing dependence on agrochemicals, soil heavy metal pollution has become a hot spot of concern all over the world. It is estimated that the currently polluted arable land area in China is nearly 20 million hm 2 , accounting for about 1 / 5 of the cultivated land area, and the area of ​​farmland sewage irrigation has reached more than 1.3 million hm 2 . Every year, 10 million tons of grain production is reduced due to land pollution, and the direct economic loss is more than 10 billion yuan. [0003] In northern France, due to the rapid development of the metallurgical industry in the 20th century, the soil was seriously polluted by heavy metals. Accordi...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105
Inventor 曾清如杨洋陈璘涵
Owner HUNAN AGRICULTURAL UNIV
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