天台县大雷山夏蜡梅群落学特征分析

Keywords: forest ecology /Tiantai /Sinocalycanthus chinensis /community structure /population structure /interspecific association

Abstract:   Objective  This study aims to explore the species composition, population structure and interspecific association of wild Sinocalycanthus chinensis community, and to supplement the distribution of wild S. chinensis resources in Tiantai County, Zhejiang Province.  Method  On the basis of field survey and previous research data, five 20 m × 20 m sample plots of S. chinensis were established for community investigation.  Result  (1) The community types of S. chinensis were diverse, mainly including deciduous broad-leaved forest, coniferous forest and bamboo forest, with obvious stratification. The dominant species of tree layer were Platycarya strobilacea, Lindera glauca, Botrocarpyum contoversum, Cunninghamia lanceolata, and Phyllostachys edulis. The dominant species of shrub layer were Hydrangea chinensis, S. chinensis, and Boehmeria tricuspis. The dominant species of herb layer were Parathylyperis glandulgera, Viola rossii, and Pilea pumila. (2)The population structure of S. chinensis was “Pyramid” type, with the highest proportion of individuals in gradeⅠ, accounting for 56.51%, indicating that the population was in the growth stage. (3) The analysis of interspecific association and correlation of species pairs in tree layer and shrub layer showed that the positive and negative correlation ratios were both greater than 1, and there was no correlation between S. chinensis and most tree species.  Conclusion  The species of S. chinensis community are closely related, and the structure and function of the community tend to be perfect, but S. chinensis may be relatively independent in the community. In view of its negative correlation and competitive relationship with Lindera erythrocarpa, Rubus corchorifolius, Cerasus schneideriana, Platycarya strobilacea and other tree species, it is suggested that in the later stage of S. chinensis field conservation, appropriate artificial selective cutting and tending measures should be taken to create a good growth environment. [Ch, 10 fig. 5 tab. 24 ref.]