Abstract: To study the effects of different restoration measures on degraded grassland vegetation and soil in a high-altitude mining area， we selected two types of terrain （flat and slope） in an artificial grassland and a natural grassland （NG） in a high-altitude mining area as the research objects. In this study， we compared the differences in plant community and soil nutrients under three restoration measures of reseeding （R）， reseeding and replaced soil （RRS）， and reseeding replaced soil and fertilization （RRSF）， and clarified the relationship between plant communities and soil nutrients under different restoration measures. The results showed that （1） the vegetation coverage showed a trend of R<RRS<RRSF<NG. The aboveground biomass of RRSF was significantly higher than that of RRS， R， and NG （P<0.05）. The results of paired sample T-test showed significant differences in plant coverage， average plant height， and aboveground biomass between flat and sloping plots under different treatments （P<0.001）. The Shannon-Weiner index and Simpson index were highest in RRSF. （2） The soil indicators of RRS were significantly higher than those of RRSF and R among the three measures （P<0.05）. But the soil total nitrogen （TN）， soil organic carbon （SOC） and soil available nitrogen （AN） of natural grassland on flat land were higher than those in artificial grassland. The results of paired sample T-test showed significant differences （P<0.05） in total nitrogen， total phosphorus， alkaline nitrogen， and available phosphorus between flat and sloping lands under different treatments. （3） The results showed that plant coverage， mean plant height， and aboveground biomass differed significantly （P<0.001） between the two terrains. TN， total phosphorus （TP）， AN， and available phosphorus （AP） differed significantly （P<0.05） between the two terrains. Therefore， taking into account the characteristics of vegetation and soil， it is better to adopt the restoration measures of supplementary sowing， soil covering， and fertilization.

Key words: Artificial grassland, Alpine mining area, Soil nutrient, Reseeding, Replacing topsoil, Fertilization, Natural grassland

摘要： 为研究不同恢复措施对高寒矿区退化草地植被和土壤的影响，以2种地形（平地和坡地）的人工草地（Artificial grassland，AG）和天然草地（NG）为研究对象，对比3种恢复措施补播（R）、补播+覆土（RRS）和补播+覆土+施肥（RRSF）下植物群落和土壤养分的差异，以阐明不同恢复措施下植物群落与土壤养分的关系。结果表明：（1）植被盖度呈R<RRS<RRSF<NG的趋势，RRSF的地上生物量显著高于RRS，R，NG（P<0.05）。Shannon-Weiner指数和Simpson指数均在RRSF时最高。（2）三种措施间RRS的土壤各指标均显著高于RRSF，R（P<0.05）。但平地上天然草地土壤全氮（Total nitrogen ，TN）、土壤有机碳（Soil organic carbon ，SOC）和土壤碱解氮（Available nitrogen，AN）高于人工草地。（3）T检验结果显示植物盖度、平均株高、地上生物量在两种地形间差异显著（P<0.001）。TN、全磷（Total phosphorus，TP）、AN和速效磷（Available phosphorus， AP）在两种地形间差异显著（P<0.05）。因此，综合植被和土壤特征，采用补播+覆土+施肥的恢复措施更好。

关键词: 人工草地, 高寒矿区, 土壤养分, 补播, 覆土, 施肥, 天然草地