中文摘要：

通过对平朔矿区原地貌、未复垦及不同复垦模式下典型样地表层土壤在0-10 cm和10-20 cm处的容重、田间持水量、有机质、全氮和碳氮比的特征进行横向、纵向与综合分析，揭示复垦土地表层土壤理化性质的变化规律。结果表明，未复垦样地除了容重以外的其他理化指标均值都低于原地貌样地和复垦样地；复垦样地中土石混排的林地表层土壤中有机质含量最高。各样地容重在0-10 cm均值都低于10-20 cm土层；仅未复垦样地的田间持水量均值在0-10 cm低于10-20 cm土层；有机质、全氮和碳氮比在0-10 cm的均值一般高于10-20 cm土层。原地貌样地中容重与田间持水量和有机质呈显著负相关；未复垦样地中容重与土壤化学指标呈极显著正相关，而田间持水量与其他指标呈极显著负相关；复垦样地中指标的相关性类似原地貌样地，只是容重与全氮之间呈显著负相关。建议土石混排方式下的复垦方向为林地，以纯土壤为复垦物质条件下的最初复垦方式为草地，在复垦10年后可考虑改变土地利用方式为耕地。

英文摘要：

To assess the impacts of reclamation on topsoil physic-chemical properties in Pingshuo mining area, this study compared bulk density（BD）, field capacity（FC）, organic matter（OM）,total nitrogen（TN） and C/N between 0-10 cm and 10-20 cm of topsoil in typical plots through the transverse,longitudinal and comprehensive analysis.The results showed that all the physic-chemical indicators except BD of unreclaimed plots were lower than those of original plots and reclaimed plots. The plot with woodland heaped by earth-rock had the highest OM among all plots. BD of all plots in 0-10 cm was lower than in 10-20 cm,while unreclaimed plots had lower FC in 0-10 cm than in 10-20 cm. Most plots had higher OM,TN and C/N at 0-10 cm than at 10-20 cm layer. BD was significantly negatively correlated with FC and OM in original plots. BD and soil chemical indicators showed a significant positive correlation in unreclaimed plots,while the FC was significantly negatively correlated with other indicators. Relativity of indicators in reclaimed plots were similar as original plots,just the relativity of BD and TN was significantly negative. The reclamation direction of woodland was suggested in lands with the woodland heaped by earth-rock,while other lands were rescaled to grassland.