Method for repairing cadmium-polluted soil through mulberry trees

A technology of cadmium-contaminated soil and mulberry trees, which is applied in the field of efficient restoration of cadmium-contaminated soils by using mulberry trees, can solve problems that affect the effect of soil restoration, underdeveloped, difficult growth cycles, etc., to avoid secondary hazards, ensure production, and speed up production. The effect of repair time

Active Publication Date: 2015-11-04
湖南省蚕桑科学研究所
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  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are few studies on the use of mulberry in soil heavy metal pollution control and remediation, especially in the treatment of heavy metal cadmium-contaminated soil, there are still many technical bottlenecks and technical obstacles: (1) Although there are many varieties of mulberry, but the real The mulberry species used to control metal cadmium is not yet clear. The applicant found that some mulberry species are difficult to complete the growth cycle in soil contaminated by metal cadmium in the research results and practical effects. At the same time, mulberry species with underdeveloped root s

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Experimental site: Experimental Base of Ping'an Neighborhood Committee, Zhongfang Town, Linxiang City, Yueyang City.

[0059] Mulberry varieties: Xiang 7920, Yue Sang No. 11, Nong Sang No. 14.

[0060] Repair operation method:

[0061] 1. Site preparation and species selection and reasonable close planting

[0062] 1) Before February 15th, the land shall be plowed and rotated twice;

[0063] 2) To plant mulberry trees before February 20, dig a planting ditch with a row spacing of 1 meter, the ditch width and depth are 50cm × 50cm, and apply enough organic fertilizer 400kg, cover with soil 10cm, and leave a 5-10cm deep ditch to plant mulberry trees. Calibrate the sampling points before planting, locate 5 points and mark them with benchmarks, and take the samples as the background value. The three varieties of Nongsang No. 14, Yuesang No. 11 and Xiang 7920 are 1000 plants / mu and 2000 plants / mu respectively. Mu, 3000 plants / mu three densities for planting.

[0064] 2 M...

Embodiment 2

[0084] Experimental site: Baowan Village Experimental Base, Huayuan Town, Dongkou County, Shaoyang City.

[0085] Mulberry varieties: Xiang 7920, Yue Sang No. 11, Nong Sang No. 14.

[0086] Repair operation method:

[0087] 1. Site preparation and species selection and reasonable close planting

[0088] 1) Before February 15th, the land shall be plowed and rotated twice;

[0089] 2) Plant mulberry trees before February 20, dig a planting ditch with a row spacing of 1 meter, the ditch width and depth are 50cm × 50cm, and apply 400 kg of organic fertilizer, cover soil 10cm, leave a 5-10cm deep ditch to plant mulberry trees, and calibrate the sampling point before planting , locate 5 points and mark them with benchmarks. Sampling and testing are used as background values. According to the three varieties of Nongsang No. 14, Yuesang No. 11, and Xiang 7920, each variety is 1000 plants / mu, 2000 plants / mu, and 3000 plants. Planting at three densities per mu.

[0090] 2. Mulberry ...

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Abstract

The invention discloses an efficient repair method for treating cadmium-polluted soil through mulberry trees. Repair of the cadmium-polluted soil is completed on the aspects of conducting soil preparation and fertilization, selecting the mulberry tree variety high in cadmium pollution resistance, reasonably planting young mulberry tree seedlings in a closed mode at the right moment, constructing and managing a mulberry tree seedling garden, adding a chelating agent and the like. By selecting the specific mulberry tree variety and completing the normal production cycle in the cadmium-polluted soil, the content of cadmium in the soil is effectively lowered; silkworms are fed through mulberry leaves to produce silkworm cocoons, and therefore cadmium in the soil can be prevented from harming health of human body through food chains; meanwhile, repair of the cadmium-polluted soil is completed within a short time period. The method is a plant repair technology high in economical value; compared with other applicable repair plants, mulberry trees have higher resistance to cadmium pollution, higher adsorption capacity, shorter repair time and safe and efficient economic benefits, and have wide application prospects in vast areas polluted by heavy metal mainly including cadmium.

Description

technical field [0001] The invention belongs to the technical field of soil pollution treatment and restoration, and in particular relates to an efficient restoration method for treating cadmium-contaminated soil by using mulberry trees. Background technique [0002] Soil heavy metal pollution has the characteristics of concealment, irreversibility, long-term and serious consequences. The treatment of heavy metal pollution in the soil system is currently an international problem and research hotspot. Countries around the world have conducted extensive research on soil heavy metal pollution remediation technology, and achieved made some progress. Specifically, there are several restoration measures as follows: (1) Engineering measures, mainly including foreign soil, soil replacement and deep plowing; (2) Physical and chemical restoration, mainly including electric restoration, electrothermal restoration and soil leaching; (3) )Chemical remediation, adding amendments to the s...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10
Inventor 颜新培黄仁志龚昕唐汇清谈顺友龙唐忠蒋诗孟贾超华
Owner 湖南省蚕桑科学研究所
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