Influence of Different Restoration Years and Slope Directions on the Ecological Restoration of Coal Mine Dump Slope
In the face of the current problems such as the single treatment and restoration measures of the dump in the mining area,the dump slope of the open-pit coal mine in Ordos area was taken as the research object.Through field investigation,the influence of different restoration years and slope directions on the ecological restoration effect of the dump slope was explored by using the method of space-time substitution.The results show that,firstly,with the increase of restoration years,Margalef richness index and Shannon-Wiener diversity index shows a trend of increasing first and then decreasing.Simpson dominance index and Pielou evenness index does not change significantly.Soil nutrient of dump slope increases with the increase of restoration time,and the effect of plant restoration on shady slope is better than that on sunny slope.Secondly,the comprehensive score of principal component analysis is the highest in the shady slope at 12-year of recovery,which is 1.212.Thirdly,the spraying alfalfa can carry out ecological restoration on dump slope.The initial effect is not obvious,but it gradually stabilizes with time.It is suggested that local plants should be selected in the early stage of restoration to increase community stability,and high nitrogen,high potassium and low phosphorus slow-release compound fertilizers should be applied during the period.The research results can provide some reference for the green restoration of mines.
万方数据
维普
