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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。
In order to scientifically assess the comprehensive effect of ecological management of degraded alpine grassland under different management measures, this study adopted the VOR and CVOR ecosystem health assessment model to conduct enclosure, breaking, fertilization and replanting of 2a in Maqu degraded alpine meadow of Gansu Province. And comprehensive measures such as five different ecological restoration measures, as well as grassland free-grazing ecosystem health were assessed. According to the results of the two models, the results of comprehensive ecological restoration measures evaluated by VOR are as follows: comprehensive measures, fertilization> sowing, sowing, enclosing> grazing, evaluating the effect of integrated ecological restoration measures by CVOR index: comprehensive measures> Scratched> fertilization, supplement broadcast, enclosure> grazing. Under the two evaluation systems, comprehensive measures were significantly better than the single treatment measures. After the implementation of 2a, the CVOR values were in the healthy range, reaching as high as 0.917. The grazing resulted in alertness of alpine meadow ecosystem health and the health index was 0.572. The results show that the application of VOR and CVOR index model to the evaluation of ecological restoration management measures can reflect the specific quantitative results after the implementation of different measures and can be applied more widely. Grasslands that are seriously degraded and in urgent need of ecological restoration can achieve the goal of comprehensive and rapid restoration of the health of grassland ecosystems through the implementation of integrated ecological restoration measures. In addition, the dual benefits of economics and ecology for each approach need to be specifically considered, the grassland health status assessed using the more comprehensive CVOR index model, and management practices developed and implemented tailored to local circumstances.