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Vegetation recovery method for extremely acidified mine soil

A vegetation restoration and soil technology, which is applied in the field of vegetation restoration of extremely acidified mine soil and soil vegetation restoration, can solve problems such as poor stability and easy degradation, and achieve the effects of high coverage, inhibition of activity, and prevention of pollution from spreading.

Pending Publication Date: 2020-08-14
SHAOGUAN TAOLIN GREEN TECH
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AI Technical Summary

Problems solved by technology

[0005] In view of this, the technical problem to be solved in the present invention is to provide a method for vegetation restoration of extremely acidified mine soils, by using a variety of plants to restore plants to control mine soil acidification deficiencies and a series of problems such as easy degradation and poor stability. Population allocation and dense planting, control the microbial flora in the acidified soil, and inhibit the potential of metal sulfide oxidation to produce acid; at the same time, follow the original succession law, carry out plant allocation in layers and stages, and gradually develop from an artificial vegetation system dominated by tolerant plants. Transition to a near-natural vegetation system to enhance the self-sustainability of the system

Method used

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  • Vegetation recovery method for extremely acidified mine soil
  • Vegetation recovery method for extremely acidified mine soil

Examples

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Embodiment 1

[0036] Example 1: Restoration of acidified soil and vegetation in the Xinshan area of ​​Dabaoshan Mine, Guangdong

[0037] Xinshan Area of ​​Dabaoshan Mine is located in Shaoguan, Guangdong. The total area of ​​the project implementation area is 250,000 square meters, the pH value of the soil in the area is as low as 2.6, showing strong acidity, and the net acid production NAG is 28.6kg H 2 SO 4 / t, with high acidification potential, almost no plants, such as figure 1 As shown in figure a. The technology of the invention is used to restore the vegetation of the acidified soil in this area.

[0038] The first stage is to construct a tolerant plant community, which specifically includes the following steps: (1) cultivating seedlings of acid-resistant / heavy metal-resistant trees, shrubs and herbaceous plants; (2) transplanting the cultivated acid-resistant / heavy metal-resistant seedlings to the acidified soil of the mine to be repaired (3) Loosen the soil and sow the seeds of...

Embodiment 2

[0040] Example 2: Vegetation Restoration of Yangtaowu Dump Site of Jiangxi Dexing Copper Mine

[0041] The Yangtaowu dump of Dexing Copper Mine is located in Shangrao, Jiangxi Province. The total area of ​​the project implementation area is 148,000 square meters. The pH value of the soil in the area is as low as 2.7, showing strong acidity, and the net acid production NAG is 21.5kg H 2 SO 4 / t, with high acidification potential, only sporadic growth of a small amount of Pseudomonas, such as figure 2 As shown in figure a. The technology of the invention is used to restore the vegetation of the acidified soil in this area.

[0042] The first stage is to construct a tolerant plant community, which specifically includes the following steps: (1) cultivating seedlings of acid-resistant / heavy metal-resistant trees, shrubs and herbaceous plants; (2) transplanting the cultivated acid-resistant / heavy metal-resistant seedlings to the acidified soil of the mine to be repaired (3) Loo...

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Abstract

The invention provides a vegetation recovery method for extremely acidified mine soil, and belongs to the technical field of vegetation recovery. The method follows a primary succession rule; plant configuration is performed in a layered and staged manner; in the first stage, primary succession started in a primary bare area is simulated, acid-resistant and heavy-metal-resistant plants are taken as main plants, and multiple plants such as trees, shrubs and grasses are subjected to group configuration; and in the second stage, tolerant plants are transited to natural succession through the compensation effect of biodiversity, and a near-natural plant community independent of the tolerant plants is constructed. According to the method, a stable three-dimensional vegetation ecological systemcan be established on the extremely acidified mine soil in a short time, soil acidification and re-acidification are effectively controlled, and the long-term stability of the vegetation system is achieved. The method is easy to operate, rapid in vegetation reconstruction, high in coverage degree, not prone to degradation, good in acidification control effect and suitable for large-area application and popularization.

Description

technical field [0001] The invention relates to a method for restoring soil vegetation, in particular to a method for restoring vegetation in extremely acidified mine soil, and belongs to the technical field of vegetation restoration. Background technique [0002] The formations of most non-ferrous metal mines contain various types of metal sulfides. These metal sulphides are oxidized to sulfuric acid upon exposure to air as a result of mining activities. Its environmental effects are mainly manifested in the following aspects: (1) Extreme acidity will aggravate the dissolution and poisoning of heavy metal ions. For each unit decrease in pH, Al 3+ The activity is roughly increased by 10 times; (2) extreme acidity will directly damage plants. High concentration of H + It will lead to the inactivation of the plant enzyme system, damage to the cell membrane, inhibit the respiration of the plant and the absorption of water and nutrients by the root system; (3) the soil matur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G17/00A01G22/00A01G22/40A01G22/60
CPCA01G17/005A01G22/00A01G22/40A01G22/60
Inventor 杨涛涛毛喆舒玮杨金金张金桃曾俊英
Owner SHAOGUAN TAOLIN GREEN TECH
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