关键词: 矿山废弃地, 植被, 恢复方式, 土壤性质, 主成分分析

Abstract: Soil is the important composition of ecosystem.Mine soil generally is seriously degraded and directly affects vegetation growth，so the way of vegetation restoration in coal mine has important influence on soil physical properties and nutrients.Based on the research status at home and abroad，6 planting restoration methods were set up in mine spoils，and compared with the original wasteland.Chemical and physical properties of soil is the main factor of determining soil fertility.The physical and chemical characteristics of the soil samples collected after recovery were analyzed，and the correlation analysis was done on impact factors.The principal component analysis was adopted to evaluate the improvement effect of the program.Research showed that:there exists significant difference in soil physical and chemical properties under the different recovery mode，and the physical and chemical properties of improved soil were greater than the original.The improved effect of matched group is better than the pure forest，among which the mixed forest of sea-buckthorn and amorpha fruticosa is best.

Key words: Mining wastelands, Vegetation, Recovery mode, Soil properties, Principal component analysis