Plant restoration method for zinc and cadmium composite polluted soil

A composite pollution and phytoremediation technology, applied in the field of phytoremediation of zinc-cadmium composite polluted soil, can solve the problems of only suitable for the restoration of lightly polluted farmland soil, long restoration period, and inability to guarantee the economic interests of farmers, etc. The effect of crop yield

Inactive Publication Date: 2018-07-27
ZHEJIANG FORESTRY UNIVERSITY
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the disadvantages in the prior art that single-utilization super-accumulative plants have a long repair cycle, the economic interests of farmers cannot be guaranteed, and it is considered only suitable for repairing lightly polluted farmland soil, etc., and provides a zinc-cadmium composite pollution The phytoremediation method of soil, combined with the current situation of rural economic development in my country and the actual situation of insufficient restoration funds, proposes a phytoremediation model of intercropping with hyperaccumulator Sedum sedum and economic crop Leizhu, and explores that it can be accepted by the majority of farmers The "production while repairing" system repair plan with practical application value

Method used

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  • Plant restoration method for zinc and cadmium composite polluted soil
  • Plant restoration method for zinc and cadmium composite polluted soil
  • Plant restoration method for zinc and cadmium composite polluted soil

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Experimental program
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Effect test

Embodiment 1

[0026] A phytoremediation method for zinc-cadmium composite polluted soil comprises selecting the zinc-cadmium composite contaminated soil to be treated as a treatment area, and interplanting sedum sedum and thunder bamboo in the treatment area.

[0027] There is a 5m isolation zone around the treatment area, and the area of ​​each treatment area is 20m 2 (10m×2m). The planting density of Sedum sedum is 15cm×15cm, 66 plants in each column, 13 plants in each row; the planting density of Thunder bamboo is 50cm×50cm, 20 plants in each column, 4 plants in each row. Phyllostachys praecox adopts the planting method of transplanting; Sedum sedum with cuttings adopts the planting method of cuttings, selects Sedum sedum with uniform size, and takes the 7-8cm aboveground part to cut directly in the control area. Phyllostachys praecox was planted on April 22, 2014, and sedum sedum was planted on April 28, 2014. The mass percentage concentration of nitrogen, phosphorus and potassium was ...

Embodiment 2

[0036] There is a 5m isolation zone around the treatment area, and the area of ​​each treatment area is 20m 2 (10m×2m). The planting density of Sedum sedatus is: row spacing of 20cm×20cm, 50 plants in each column, 10 plants in each row; Phyllostachys praecox planting density is: row spacing of plants is 75cm×75cm, 13 plants in each row, 2 plants in each row. Phyllostachys praecox adopts the planting method of transplanting; Sedum sedum with cuttings adopts the planting method of cuttings, selects Sedum sedum with uniform size, and takes the 7-8cm aboveground part to cut directly in the control area. Phyllostachys praecox was planted on April 22, 2014, and sedum sedum was planted on April 28, 2014. The mass percentage concentration of nitrogen, phosphorus and potassium was applied to each treatment area with a concentration of 15%: 15%: 15% of nitrogen and phosphorus Potassium compound fertilizer 1.5kg, regular watering and weeding. Sedum sedum with mines is harvested every 4...

Embodiment 3

[0038] There is a 5m isolation zone around the treatment area, and the area of ​​each treatment area is 20m 2 (10m×2m). The planting density of Sedum sedum is 18cm×15cm, 55 plants in each column, 13 plants in each row; Phyllostachys praecox planting density is: 100cm×100cm, 10 plants in each column, 2 plants in each row. Phyllostachys praecox adopts the planting method of transplanting; Sedum sedum with cuttings adopts the planting method of cuttings, selects Sedum sedum with uniform size, and takes the 7-8cm aboveground part to cut directly in the control area. Phyllostachys praecox was planted on April 22, 2014, and sedum sedum was planted on April 28, 2014. The mass percentage concentration of nitrogen, phosphorus and potassium was applied to each treatment area with a concentration of 15%: 15%: 15% of nitrogen and phosphorus Potassium compound fertilizer 1.5kg, regular watering and weeding. Sedum sedum with mines is harvested every 5 months, and fertilized again, and new...

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Abstract

The invention relates to the technical field of plant restoration in heavy metal composite polluted soil, and discloses a plant restoration method for zinc and cadmium composite polluted soil. The plant restoration method is characterized in that the to-be-controlled zinc and cadmium composite polluted soil is used as a control area; sedum plumbizincicola and phyllostachys praecox are interplantedin the control area; the phyllostachys praecox is planted in a transplanting way, and the distance between the phyllostachys praecox is 50 to 100cm; the sedum plumbizincicola is planted in a cuttageway, the 7-8cm part, above the ground, of the sedum plumbizincicola is selected, and the distance between the sedum plumbizincicola is 15 to 20cm. The plant restoration method has the advantages thatthe plant restoration mode, namely simultaneous restoration and production, can be adopted for the zinc and cadmium composite polluted soil; under the synergistic action of the sedum plumbizincicola and the phyllostachys praecox, the content of zinc and cadmium in the zinc and cadmium composite polluted soil can be stably reduced, the output of crop is certainly increased, and the certain economicbenefit of farmers is ensured.

Description

technical field [0001] The invention relates to the technical field of phytoremediation of heavy metal compound polluted soil, in particular to a phytoremediation method of zinc cadmium compound polluted soil. Background technique [0002] At present, soil heavy metal pollution has become a global environmental problem. Heavy metal pollution in soil has the characteristics of long residence time and cannot be removed through degradation. The harm to the environment and human beings is long-term, cumulative and irreversible, and the difficulty of treatment is also extraordinary. Our country has a lot of people and little land, and land is the most basic means of production for many farmers to survive. Therefore, farmers will continue to work even if the land is polluted when there is no other source of income. At present, due to the wide range of farmland pollution in my country, it is difficult to secure restoration funds, and "poisonous" production in polluted soil may ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00
CPCB09C1/105B09C2101/00
Inventor 武帅吴胜春张进梁鹏曹玉成许佳霖
Owner ZHEJIANG FORESTRY UNIVERSITY
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