以藏东南嘎朗国家湿地公园内39株对象木及210株竞争木为研究对象,基于野外实地调查数据,利用Hegyi的单木竞争指数模型计算华山松群落内物种的竞争指数,并采用回归分析的方法建立对象木胸径与整个林分、伴生树种、种内竞争强度的函数模型。结果表明:1)华山松胸径与树高存在显著的幂函数关系;2)华山松的种内和种间竞争指数分别占总竞争指数的54.68%和45.32%,以种内竞争为主;3)华山松种间竞争树种的顺序为川滇高山栎>林芝云杉>高山松;4)华山松胸径与整个林分、伴生树种、种内的竞争指数呈显著的负相关关系,所得模型能有效的预测华山松种内和种间的竞争强度;5)华山松种群属于增长型,需加强保护成熟林以防出现断层。

Taking 39 target trees and 210 competitive trees in Galang National Wetland Park in southeast Tibet as the research objects,based on field survey data,the competition index of species in Pinus armandii community was calculated by Hegyi individual competitive indices(CI) model,and the regression analysis method was used to establish the functional model of DBH of target trees with the whole stand,associated tree species and intraspecific competition intensity.The results showed that:1) There was a significant power function relationship between DBH and tree height of P.armandii;2) The intraspecific and interspecific competition index of P.armandii accounted for 54.68 % and 45.32 % of the total competition index respectively,intraspecific competition was dominant in the community;3) The order of compe-titive species among P.armandii species was Quercus aquifolioides> Picea likiangensis var.linzhiensis> Pinus densata;4) The DBH of P.armandii had a significant negative correlation with the competition index of the whole stand,associated tree species and intraspecific,and the model can effectively predict the intraspecific and interspecific competition intensity of P.armandii;5) P.armandii population.belongs to the growth type,need to strengthen the protection of mature forest to prevent faults.