Effects of soil properties on vegetation restoration in coal-gangue pile

doi:10.3969/j.issn.1000-2006.2014.S1.020

LIU Longchang, JIA Juan, XU Guorui, MENG Fu

Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2014, Vol. 38 ›› Issue (增刊) : 99-104.

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Journal of Nanjing Forestry University (Natural Sciences Edition） ›› 2014, Vol. 38 ›› Issue (增刊) : 99-104. DOI: 10.3969/j.issn.1000-2006.2014.S1.020

Effects of soil properties on vegetation restoration in coal-gangue pile

LIU Longchang¹, JIA Juan², XU Guorui³, MENG Fu¹

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Abstract

Waste coal-gangue piles not only occupied and destroyed large fields, but also brought about a series of problems of environment. So it is significant to do the research on restoring vegetation of coal-gangue pile in for local environment. The naturally restored vegetation status were investigated by traditional plot-survey, and soil chemicals and physical properties were analyzed by using standard methodology. The natural vegetation patterns along the environmental gradient and their relationships with ecological factors were analyzed by TWINSPAN, DCA and DCCA. The results showed that the coal-gangue piles could be divided into three groups according to community ordination: the 36° slope of the coal-gangue pile that was discarded for 35 years; the coal-gangue pile was discarded for 30 or 35 years; the coal-gangue pile was discarded for 45 or 55 years and Robinia pseudoacacia forest which was discarded for 20 years. The results of DCA and TWINSPAN for vegetation plots and soil properties were similar. The axes of DCA and DCCA ordination diagram indicated that the variation of vegetation in coal-gangue pile was influenced by physical properties and soil chemicals, such as cation exchange capacity, bulk density and nutrient. Planting trees(such as R. pseudoacacia)could significantly accelerate the natural recovery of vegetation waste dump and soil improvement process.The results also suggest that the improvement of soil chemicals and physical properties was contributed to natural vegetation recovery. Since natural plants are difficult to grow owing to the instability of slope, measures should be taken to make the slope secure, or along with engineering combined with planting some drought-resistant, barrenness-resistant and deep-rooted plants to speed up ecological restoration of the slope.

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LIU Longchang, JIA Juan, XU Guorui, MENG Fu. Effects of soil properties on vegetation restoration in coal-gangue pile[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2014, 38(增刊): 99-104 https://doi.org/10.3969/j.issn.1000-2006.2014.S1.020

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