以黑岱沟露天煤矿排土场不同植被恢复方式下复垦土壤为研究对象,主要分析了沙棘、紫穗槐、杨树和沙棘杨树混交林以及玉米这5种人工植被下土壤的基本理化性质和蔗糖酶、脲酶、碱性磷酸酶这3种水解酶的活性,并通过简单相关分析和通径分析研究了土壤基本理化性质与酶活性之间的相关关系,揭示了不同植被恢复下土壤酶活性差异的驱动因子,为该区复垦植物的选择及复垦效果评价提供科学合理的建议与参考.结果表明:15种人工植被恢复下排土场土壤基本理化性质得到改善,土壤酶活性有一定提高,但仍未达到天然草地的水平;2沙棘的有机碳和全氮含量最接近草地,达到草地的54.22%和70.00%,且其容重比最大容重紫穗槐的低17.09%,表现出复垦优势;与沙棘林相比,杨树林的土壤有机碳和全氮比沙棘分别低35.64%和32.14%,容重比沙棘林高16.79%;3不同植被间土壤碱性磷酸酶活性差异不大,而土壤脲酶活性能更敏感地反映不同植被恢复对土壤性质的影响.4排土场复垦土壤有机碳和全氮含量的提高,是排土场肥力恢复和生物活性提高的主要原因. Taking the reclaimed soil of Heidaigou open-pit coal mine dump under different vegetation restoration methods as the research object, the basic physical and chemical properties of soils under five kinds of artificial vegetation, including seabuckthorn, Amorpha fruticosa, Poplar and Hippophae rhamnoides, Sucrase, urease and alkaline phosphatase. The correlations between soil physico-chemical properties and enzyme activities were studied by simple correlation analysis and path analysis. The results showed that soil enzyme activities under different vegetation restoration Which could provide scientific and reasonable suggestion and reference for the selection of reclamation plants and the evaluation of reclamation effect.The results showed that the basic physical and chemical properties of soil were improved and the soil enzyme activity was certain under the restoration of 15 kinds of artificial vegetation But not yet reached the level of natural grassland.2 The contents of organic carbon and total nitrogen of seabuckthorn were the closest to the grassland, reaching 54.22% and 70.00% of the grassland respectively, and their bulk density was 17.09% lower than that of Amorpha fruticosa, Compared with seabuckthorn forest, the soil organic carbon and total nitrogen of poplar forest were 35.64% and 32.14% lower than that of seabuckthorn respectively, and the bulk density was 16.79% higher than that of seabuckthorn forest. The content of alkaline phosphatase However, soil urease activity can more sensitively reflect the effect of different vegetation restoration on soil properties.4 The increase of reclaimed organic carbon and total nitrogen in the dump site is the result of the restoration of fertility and the increase of biological activity The main reason.