关键词: 土地岭, 生态恢复, 群落外貌, 放牧干扰, 更新

Abstract: The physiognomy, species composition and the structure of communities in the restoration process in Tudiling of Mao County on upper reach of Minjiang River were studied. The results showed that the physiognomy, after afforestation, was characterized by phanerophytes with microphylls, simple, unentire, herbaceous leaves, which represented some features of temperate coniferous and broadleaved mixed forest matched with the early successional stage. There were obvious differences in species composition of four communities, and the richness was the highest under closed afforestation and the lowest under disturbance. The vertical structure was more complicated, Rubus setchuenensis dominated in shrub layer of all four communities in the restorational processes of vegetation. The low species richness and evenness, and restricted progressive succession were mainly determined by grazing. The coverage of upper layer had a significant effect on the lower layer. The unpalatable grasses quickly predominated in herb was also caused by grazing. The DBH structure indicated a trend that Pinus armandii forest would be replaced by Picea spp. The closed afforestation adding some species of climax was the more suitable type of restoration here.

Key words: Tudiling, ecological restoration, community physiognomy, grazing disturbance, regeneration