关键词: 亚高山草甸;草地恢复;封育;地上生物量;载畜量

Abstract: In this study, the degraded sub-alpine meadow in Shangri-La City, locating in the northwest part of Yunnan Province, was chosen as the subject investigated and was continuously enclosed from 2012 to 2018. Above-ground biomass and botanical composition of vegetation in restoration succession was determined and assessed, and both of their variation trends were characterized. Furthermore, intermediate disturbance hypothesis was used to evaluate the reasonable enclosure period and stocking capacity. The results showed that compared to the degraded areas, the significant higher above -ground biomass was observed in the enclosed plots at the first, second and fifth year of enclosing;the above -ground biomass of the grassland was increased as power function model during the enclosure period, and the resistance and resilience of the grassland was 518.8 g/m^2 and 56.3 months;at the fifth year of enclosure, the non-forage species (including poisonous and harmful species) still accounted for 29.2% of all the species of vegetation, and the suitable stocking capacity was 2.81 -3.37 ewe equivalent per hectare. In conclusion, weeds removing in combination with enclosure during pasture restoration succession is conductive to improve pasture quality and increase pasture productivity in a more efficient way.