Ecological restoration method for miscanthus sinensis in acid mining area

A technology for ecological restoration and mining areas, applied in the restoration of polluted soil, etc., can solve the problems of high maintenance cost, high input cost, long construction period, etc., to achieve the effect of no secondary pollution, improved survival rate, and low input cost.

Pending Publication Date: 2021-01-22
HUNAN AIRBLUER ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods often have problems such as high input cost, low cost performance, difficult construction, long construction period, high maintenance cost, and small biomass.

Method used

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  • Ecological restoration method for miscanthus sinensis in acid mining area
  • Ecological restoration method for miscanthus sinensis in acid mining area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] This embodiment provides a method for ecological restoration of Chinese awns in acid mining areas, and the implementation site is in the sulfur mining area of ​​Le'an Township, Dafang County, Guizhou Province.

[0103] According to the GB 15618 Soil Environmental Quality Standard, the soil environmental quality is classified. The mining area belongs to Class III.

[0104] Carry out plant sampling and soil sampling, and determine the content of related substances respectively. Refer to "LY / T2770 Technical Regulations for Vegetation Ecological Restoration of Abandoned Land in Southern Nonferrous Metal Mining Areas". The comprehensive fertility index was calculated according to the nutrient index, and the evaluation level was low.

[0105] Use seedling-raising substrates including 50% fermented straw, 25% peat soil, 10% vermiculite, 5% perlite, and 10% loess mixed with water; after pouring the substrate with 800mg / L concentration of carbendazim solution, put the substrate ...

Embodiment 2

[0110] This embodiment provides a method for ecological restoration of Chinese awns in acidic mining areas, and the implementation site is in the sulfur mining area of ​​Le'an Township, Dafang County, Zhouzhou. The difference from Example 1 is that different plots are selected.

[0111] According to the GB 15618 Soil Environmental Quality Standard, the soil environmental quality is classified. The mining area belongs to Class III.

[0112] Carry out plant sampling and soil sampling, and determine the content of related substances respectively. Refer to "LY / T2770 Technical Regulations for Vegetation Ecological Restoration of Abandoned Land in Southern Nonferrous Metal Mining Areas". The comprehensive fertility index was calculated according to the nutrient index, and the evaluation level was low.

[0113] Use seedling raising substrates including 55% fermented straw, 22% peat soil, 5% vermiculite, 6% perlite, 12% loess mixed with water; after pouring the substrate with 1000m...

Embodiment 3

[0118] The difference from Example 2 is that other plots in the mining area are selected for restoration.

[0119] The sulfur mining area in Le'an Township, Dafang County, Guizhou Province was repaired according to different areas, and the average value of the relevant indicators before and after the restoration was calculated. The conclusions are as follows:

[0120] After restoration, the average pH value of the soil in the mining area increased by 0.54, and the acidification phenomenon was improved. Soil organic matter, total nitrogen and water content increased by 194.5%, 78.7% and 933.6% respectively, indicating that the soil properties of the abandoned mine land have also improved;

[0121] Heavy metal reduction: In the tailings area where Miscanthus distribution coverage is about 75%, the average amount of Pb, Zn, Cu and Cd in the soil migrated by Miscanthus is 2471.3, 4037.4, 69.4 and 28.3 mg·kg -1 .

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Abstract

The invention provides an ecological restoration method for miscanthus sinensis in an acid mining area, and relates to the field of ecological restoration. The ecological restoration method comprisesthe steps that quality evaluation is conducted on a to-be-restored area of the acid mining area, and then soil improvement is conducted according to the result of the quality evaluation; and miscanthus sinensis is planted to the to-be-repaired area subjected to soil improvement. The ecological restoration method for miscanthus sinensis in the acid mining area is relatively low in investment cost,good in restoration effect and free of secondary pollution; compared with other ecological restoration technologies, the method is relatively simple to implement; and the later maintenance cost is lowafter mining area planting is completed.

Description

technical field [0001] The invention relates to the field of ecological restoration, in particular to a method for ecological restoration of Chinese awns in acid mining areas. Background technique [0002] At present, there is a problem of soil pollution in acid mining areas. Affected by air oxidation and rain erosion, long-term stacking of slag in acid mining areas has caused extreme acidification of the surrounding soil and brought many environmental problems. [0003] In order to solve the problem of heavy metal pollution in acid mining areas left over from history and improve the ecological environment, people have been devoting themselves to the research on ecological restoration of acid mining areas. In the prior art, the method of transplanting multiple plants and rebuilding the mixed ecological chain is mostly adopted. These methods often have problems such as high input cost, low cost performance, difficult construction, long construction period, high maintenance ...

Claims

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Application Information

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IPC IPC(8): B09C1/10
CPCB09C1/105B09C2101/00
Inventor 王栋曾睿胡志鑫杨攀陈丹颜柱唐传祥
Owner HUNAN AIRBLUER ENVIRONMENTAL PROTECTION TECH
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