四川省荣县桫椤自然保护区桫椤群落研究

从植物区系成分、外貌结构和种间关联等方面报道了四川省荣县桫椤自然保护区的群落学特征．研究表明：该保护区植物科属分布区类型以热带成分占绝对优势；群落外貌特征为以单叶，中型叶为主的常绿高位芽植物所决定的中亚热带常绿阔叶林植被；群落结构嵌镶性明显；种间显著的正关联存在于水红木与球序鹅掌柴、水红木与野漆树、球序鹅掌柴与野漆树间：显著的负关联存在于球序鹅掌柴与野鸦椿、球序鹅掌柴与四川大头茶、水红木与野鸦椿、水红木与四川大头茶之间；桫椤与其它主要树种间关联较低．

Studies on the Alsaphila Spinulosa Community of the Alsophila Spinulosa Nature Reserve in Rong County, Sichuan Province

The phytoxoenological features of the Alsophila Spinulosa in the Nature Reserve of Rong County are reported from floral element, physiognomy pattern and interspecies correlation in this paper. The results showed that in the nature reserve the tropical element is dominant of vegetation areal types; The character of community physiognomy is evergreen broad-leaved forest controlled by phaenerophyte of simple and middle leaves principally; The mosaic of the community structure is obvious, the significant positive correlation of interspecies exists between Viburnum sambucinum Bl. Var. tomentosum Hallier f. and Schefflera glomerulata Li., Viburnum sambucinum Bl. Var. tomentosum Hallier f. and Rhus succedanea L., Schefflera glomerulata Li. and Rhus succedanea L.; significant negative relationship appears between Schefflera glomerulata Li. and Euscapnis japonica Diels., Schefflera glomerulata Li. and Gordonia szechuanensis Chang., Viburnum sambucinum Bl. Var. tomentosum Hallier f. and Euscapnis japonica Diels., Viburnum sambucinum Bl. Var. tomentosum Hallier f. and Euscapnis japonica Diels. There low correlation ships for Alsaphila Spinulosa to other species in the community.