Studies on the Community Flora Characteristics of the Pattern of Planting Cunninghamia lanceolata and Leaving Broad-Leaved Trees

The results show that the community plant genera and species composition numbers (102 genus,138 species )of the pattern of planting Cunninghamia lanceolata and leaving broadleaved trees all greatly exceed those (87 genus,108 species) of C.lanceolata pure forests.This pattern possesses biodiversity and stronger water and soil conservation function, the flora characteristics of it have an relatively big difference with those of C.lanceolata pure forests,the comparability between communities is small.The deciduous broad leaved tree species in the community arbor layer of the pattern possess relatively big important value.The community field layer of the pattern is mainly composed of light demanding species,Angiopteris fokiensis is not found,whereas it is the indicator plant of C.lanceolata pure forests.The distribution area types of seed plant genus of 2 communities are all mainly composed of tropical components.The tropical distributive proportion of community genus of the pattern is smaller than that of C.lanceolata pure forests.