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Changes in soil quality during different ecological restoration years in the abandoned coal mine area of southern China
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  • Wenbo Chen,
  • Hao Li,
  • Cheng Zhang,
  • Haifen Liang
Wenbo Chen
East China University of Technology

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Hao Li
Coal Geological Bureau of Jiangxi Province
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Cheng Zhang
Jiangxi Agricultural University
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Haifen Liang
Jiangxi Agricultural University
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Understanding the effects of abandoned coal mine ecological restoration on soil quality and function is important to protect the regional ecological environment. This study aims to evaluate the ecological restoration effects of soil quality in abandoned coal mine area. Taking Fengcheng county, a typical coal- rich area in southern China as a case, this study took 120 soil samples to investigate the influence of restoration years on soil quality by using an integrated soil quality index (SQI). Results indicated that restoration years had significant effects on the saturated hydraulic conductivity (Ks) by affecting the soil bulk density (SBD), clay content and soil water content (SWC). Furthermore, clay, soil organic matter (SOM), Ks and pH were selected to assess the effect of ecological restoration years on soil quality. It was found that the ecological restoration 8 years (ER8) site had higher SQI value, indicating ecological restoration years showed a positive correlation with SQI in abandoned coal mine area. The SQI value was higher for the surface soil layer than the sub-surface soil layer of the restoration area. The results of this study is of great significance for improving the effects of ecological restoration and management in abandoned coal mine area.