杉木与桉树、红锥混交生长效应分析

Analysis of Growth of Cunninghamia lanceolata,Eucalyptus and Castanopsis hystrix in Mixed and Pure Plantations

对杉木纯林、红锥纯林、桉树纯林、杉木与桉树混交林以及杉木与红锥混交林生长情况进行调查分析,结果表明:杉木和红锥的胸径及树高生长量在纯林和混交林分中生长差异不大;杉木与桉树混交林每公顷总蓄积量高于杉木纯林,红锥平均单株材积年增长量为纯林低于混交林中,说明本试验选择的混交模式中各树种生长良好,树种选择搭配合理。

Investigation were carried out on pure plantation forests of Cunninghamia lanceolate, Castanopsis hystrix Eucalyptus sps. along with mixed species plantations of C. lanceolata with C. hystrix and of C. lanceolata with Eucalyptus. The results showed that annual growth of tree height and DBH in C. lanceolata and C. hystrix had little difference between pure species plantations and mixed plantations. However, the average volume per hectare for mixed plantations of C. lanceolata with Eucalyptus was higher than that of pure plantations of C. lanceolate while the average individual year volume increment of pure C. hystrix plantations was lower than that mixed plantations of C. lanceolata with C. hystrix, these results shows that the growth of mixed species plantations depends on the selection of species, with the species included in this study showing reasonable performance in mixed species plantations.