Effects of Different Soil and Water Conservation Measures on Soil and Vegetation of Open-pit Coal Mine Drainage Sites

Yin Jiaqi; Guo Jianying; Shan Dan; Xing Ende; Li Yao

doi:10.13961/j.cnki.stbctb.2024.06.002

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Effects of Different Soil and Water Conservation Measures on Soil and Vegetation of Open-pit Coal Mine Drainage Sites

- Effects of Different Soil and Water Conservation Measures on Soil and Vegetation of Open-pit Coal Mine Drainage Sites
- Bulletin of Soiland Water Conservation Vol. 44, Issue 6, Pages: 12-22(2024)
- 作者机构：
  
  1. 内蒙古农业大学沙漠治理学院,内蒙古,呼和浩特,010018
  2. 中国水利水电科学研究院内蒙古阴山北麓草原生态水文国家野外科学观测研究站,北京,100038
  3. 鄂尔多斯市国土空间规划院,内蒙古,鄂尔多斯市,017000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2024.06.002
  CLC： X752;S157.2
- Published：2024
- 稿件说明：
移动端阅览
Yin Jiaqi, Guo Jianying, Shan Dan, et al. Effects of Different Soil and Water Conservation Measures on Soil and Vegetation of Open-pit Coal Mine Drainage Sites[J]. Bulletin of Soiland Water Conservation, 2024, 44(6): 12-22.
DOI：

Yin Jiaqi, Guo Jianying, Shan Dan, et al. Effects of Different Soil and Water Conservation Measures on Soil and Vegetation of Open-pit Coal Mine Drainage Sites[J]. Bulletin of Soiland Water Conservation, 2024, 44(6): 12-22. DOI： 10.13961/j.cnki.stbctb.2024.06.002.

摘要

[目的] 探究不同水土保持措施对露天煤矿排土场土壤养分和植物多样性的影响，旨在为矿区排土场等废弃地的生态恢复提供可行的技术措施。[方法] 在草原露天煤矿排土场裸露边坡布设8种水土保持工程措施与植物措施相结合的水土保持措施，以无措施(CK)为对照，采用样方法调查植物群落特征，并测定土壤主要理化性质，对比分析不同水土保持措施下植物群落特征、土壤特性的变化差异，采用冗余法分析植物群落特征与土壤特性之间的相互关系。[结果] ①排土场边坡采取水土保持措施对土壤主要理化性质有不同程度的影响，其中土壤速效养分含量变化明显(p<0.05)，撒播混草＋生态袋间隔1 m (Ⅱ)和撒播混草＋生态袋间隔2 m (Ⅲ)2种措施的土壤速效磷含量达到3.38，3.13 mg/kg，分别比对照(CK)(2.20 mg/kg)增加53.6%，42.3%；撒播混草＋生态袋间隔2 m (Ⅲ)，撒播混草＋土工格室(Ⅶ)，撒播混草＋草帘子(Ⅷ)3种措施的土壤速效钾含量为108.25，126.25 ，124.00 mg/kg，对照样地土壤速效钾含量仅为53.25 mg/kg。②水土保持措施对植物群落特征的影响主要表现在Simpson优势度指数上，除撒播混草＋沙柳沙障(Ⅵ)和撒播混草＋土工格室(Ⅶ)的与对照(CK)间差异不显著外(p>0.05)，其他组均显著高于对照(CK，p<0.05)。③冗余分析结果表明，Margalef丰富度，Simpson优势度指数和Shannon-Wiener多样性指数均与土壤速效磷呈显著正相关；Louie均匀度指数与土壤全氮、速效钾和缓效钾呈显著正相关。[结论] 露天煤矿排土场实施水土保持措施可提高土壤养分含量和植物多样性，对于生态恢复有积极的作用；撒播混草＋生态袋间隔2 m (Ⅲ)和撒播混草＋沙柳沙障(Ⅵ)的水土保持措施具有较好的生态修复效果，可作为矿区排土场生态修复的主要措施推广应用。

Abstract

[Objective] The effects of different soil and water conservation measures on soil nutrients and plant diversity in open-pit coal mine dumps were explored

aiming to provide feasible technical measures for the ecological restoration of mine dumps and other abandoned lands. [Methods] Eight soil and water conservation measures combining soil and water-conservation-engineering and plant measures were deployed on the exposed slopes of the grassland open-pit coal mine discharge site

with no measures (CK) as the control. Sampling was conducted to investigate the characteristics of the plant community

as well as to determine the main physicochemical properties of the soil

compare and analyze the differences in the changes in the characteristics of the plant community

and soil properties of the different soil and water conservation measures. The redundancy method was used to analyze the correlation between plant community characteristics and soil properties. [Results] ① The soil and water conservation measures applied on the slope of the discharge site affected differently the main physicochemical properties of the soil

in which the soil quick-acting nutrient content changed significantly (p<0.05)

and the soil quick-acting phosphorus content of the two measures-spreading mixed grass + ecological bag spacing 1m (Ⅱ) and spreading mixed grass + ecological bag spacing 2 m (Ⅲ)-reached 3.38 and 3.13 mg/kg

respectively. These increased by 53.6% and 42.3% compared to that of the control (CK) (2.20 mg/kg)

respectively. The soil quick-effect potassium content of the three measures of spreading mixed grass + ecological bag spacing 2 m (Ⅲ)

spreading mixed grass + geocell (Ⅶ)

and spreading mixed grass + grass curtain (Ⅷ) was 108.25

126.25

and 124.00 mg/kg

respectively. In contrast

the soil quick-effect potassium content of the control plot was only 53.25 mg/kg. ② The effects of soil and water conservation measures on plant community characteristics manifested mainly in the Simpson’s dominance index

which was significantly higher than that of the control (CK)

except for the insignificant differences (p>0.05) between the spreading of sedge + salix psammophila sand barriers (Ⅵ) and the spreading of sedge + geocell (Ⅶ) (p<0.05). ③ The results of redundancy analysis showed that the Margalef richness

Simpson dominance index

and Shannon-Wiener diversity index were all significantly positively correlated with soil quick-acting phosphorus. The Louie evenness index was significantly positively correlated with soil total nitrogen

quick-acting potassium

and slow-acting potassium. [Conclusion] The implementation of soil and water conservation measures in open-pit coal mine dumps can improve the soil nutrient content and plant diversity

which has a positive effect on ecological restoration. The soil and water conservation measures of spreading mixed grass + ecological bag with an interval of 2 m (Ⅲ) and spreading mixed grass + salix psammophila sand barriers (Ⅵ) have a better ecological restoration effect

which can be popularized and applied as the main measures for ecological restoration of dumps in the mining area.

关键词

Keywords

references

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