杉木米老排人工群落乔木层结构与动态研究

对杉木米老排几种人工林群落乔木层结构与动态进行研究，结果表明在杉木米老排 混交林中米老排胸径是杉木胸径的１．０２倍，其树高是杉木树高的１．０１倍，其平均株净生产力是杉木的１．００倍。杉木米老排混交林各物种胸径和树高均不及杉木和米老排纯林大，但随着时间的推移，杉木米老排混交林在自然状态下，朝着米老排为主的森林群落发展。

A Study on the Structure and Dynamics of the Tree Layer of Artificial Forest of Mytilaria laosensis and Cunninghamia lanceolata

The average diameter at breast height of Mytilaria laosensis is 1.02 times that of Cunninghamia lanceolata. Similarly, the mean height is 1.01 tiems and the average productivity per individual is 1.00 times that of the Cunninghamia lanceolata. Although the diameter at breast height and height of both species in mixed forest including Mytilaria laosensis and Cunninghamia lanceolata are less than those in pure forest of Mytilaria laosensis or in pure forest of Cunninghamia lanceolata, the artificial mixed forest develops naturally toward Mytilaria laosensis dominated forest.