Acta Geographica Sinica ›› 2013, Vol. 68 ›› Issue (3): 372-379.doi: 10.11821/xb201303008

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Influence of vegetation restoration models on soil nutrient of coal gangue pile: A case study of No.1 Coal Gangue Pile in Hedong, Shanxi

WANG Shangyi, SHI Ying, NIU Junjie, FAN Lanying   

  1. Taiyuan Normal University, Taiyuan 030012, China
  • Received:2012-11-12 Revised:2013-12-18 Online:2013-03-20 Published:2013-05-10
  • Supported by:

    National Natural Science Foundation of China, No.41071335

Abstract: The soil nutrients and influencing factors of vegetation restoration in Hedong coal gangue pile were studied from 2009 to 2011. The results showed that species diversity, vegetation coverage and biomass in coal gangue pile increased with the time of vegetation restoration while ground temperature decreased significantly. Contents of available phosphorus and available potassium in soil reached the third level according to the national soil gradation, and contents of alkali-hydro nitrogen and organic matter were 11.94 mg kg-1 and 7.69 g kg-1, respectively. Model of Amorpha fruticosa helped to improve the content of available phosphorus while the content of alkali-hydro nitrogen was the most under Model of Amorpha fruticosa, Festuca elata and Medicago sativa and the improvement of available potassium and organic matters under Model of Festuca elata and Medicago sativa was the best. Slope degree and surface temperature had significantly negative correlation with soil nutrient; the average biomass and Festuca elata coverage influenced significantly the soil nutrient; Medicago sativa coverage had significantly positive correlation with alkali-hydro nitrogen, available potassium and organic matters. Combination model of herb, shrub and tree were used when the eco-environment condition improved after herb was planted in the early stage of vegetation restoration of coal gangue pile.

Key words: coal gangue, soil nutrient, vegetation restoration, RDA