中文摘要：

为了科学评估不同管理措施下退化高寒草地生态治理的综合成效,该研究采用VOR及CVOR生态系统健康评价模型,对甘肃省玛曲退化高寒草甸实施2a的围封、划破、施肥、补播和综合措施等五种不同生态恢复措施,以及自由放牧下的草地生态系统健康状况进行了评估。根据两种模型测算结果,用VOR指数评价综合生态恢复措施的效果大致为：综合措施、施肥〉划破、补播、围封〉放牧,用CVOR指数评价综合生态恢复措施的效果：综合措施〉划破〉施肥、补播、围封〉放牧。综合措施在2种评价体系下均显著优于各单一处理措施,实施2a后其CVOR数值处于健康范围,高达0.917,且放牧导致高寒草甸生态系统健康趋于警戒水平,健康指数值为0.572。结果表明,VOR及CVOR指数模型应用于生态恢复管理措施的效果评价,可反映出不同措施实施后的具体量化效果,可进行更广泛适用。在退化严重亟需生态恢复的草地,可通过综合生态恢复措施的实施,以达到全面迅速恢复草地生态系统健康的目的。此外,需具体考量每种措施的经济学和生态学双重效益,利用更全面的CVOR指数模型评价草地健康状况,因地制宜地制定和实施管理措施。

英文摘要：

Alpine meadow mainly locates in the Qinghai-Tibetan Plateau and other high altitude areas,and plays a vital role in maintaining the balance of the global ecosystem.Recently,the extensive degradation of alpine meadow has been caused by the global climate change and the interference of human activities,which has made these areas extremely important for further study.People have applied a few measures to restore the degraded grassland,however there was no quantitative mean that could evaluate the effectiveness of ecological restoration measures synthetically.For the scientific assessment of the effects of different ecological regulation measures on the degraded alpine meadow ecosystems,this research was conducted in Maqu alpine meadow in Gansu Province,northwestern China from May 2010 to December 2012.The VOR（vigor,organization,resilience） and CVOR（condition,vigor,organization,resilience） ecosystem health evaluation models were utilized to evaluate the health condition of the degraded grassland ecosystem after restoration,and the restoration measures included enclosure,ripping,organic material addition,reseeding and comprehensive measure,and the grazing was taken as the control.We implemented enclosure and slicing of the pasture vertically and horizontally with the plough as ripping,implemented enclosure,scarifying and fertilization in the pasture with sheep manure of 22.5 t/hm2 as organic material addition,and implemented enclosure and reseeding with Elymus nutans of 15 kg/hm2 as reseeding.And for grazing treatment we used the grazing pressure of about 2-2.5 yak/hm2.As for comprehensive measure,we combined the treatment of enclosure with the treatments of ripping,organic material addition and reseeding.For the calculation of evaluation model,we determined soil organic carbon content and gauged above-ground biomass,Shannon-Wiener species diversity index,biomass of functional groups and economic groups of all the grass under different regulation measures to further compute condition index（C）,vigor index?