关键词: 伯乐树, 径级结构, 种群特征, 种间关系

Abstract: [Objective] The aim of the study was to investigate the community characteristics of Bretschneidera sinensis in southern Guizhou and to provide some basic data and references for protection of wild population of B. sinensis. [Method] Based on field investigation, the characteristics of B. sinensis community in Yaorenshan in Sandu county, Maobiling in Danzhai county and Doupengshan of Duyun city was studied. [Results] There were a lot of species in B. sinensis community. 149 vascular plants(116 genera and 67 families) were investigated. In the investigation, most of species are Lauraceae plants. The major areal types of genera were tropics and subtropics. The important value of B. sinensis in the tree layer was 3.57. Moreover, the important value of shrub and herb layers was 0and 5.00, respectively. The individual of saplings(DBH<3 cm) was greatest(83.58%). No individuals of saplings(5 cm< DBH ≤15 cm) were found. We can concluded that the B. sinensis population was a decline type population with insufficient individuals of seedlings and saplings. [Conclusion] In order to protect B. sinensis better, some species that competed with B. sinensis should be removed and population size can be expanded by artificial breeding.

Key words: Bretschneidera sinensis Hemsl., size structure, population structure, interspecific relationship