不同林分格木人工林目标树生长性状差异

为了研究格木人工林中个体间的差异，给格木个体选优提供理论基础，选取中国林科院热带林业实验中心白云试验场及哨平试验场的1982年定植的格木人工林中目标树为研究对象，测量胸径、树高枝下高以及林分中个体的分类等级，分析各林分中个体之间在各个测定指标中的离散系数和4个林分之间的生长差异。结果表明，4个格木林分中优势个体的分类等级及枝下高的离散系数较大，最高达到：0.220，0.360，树高和胸径的差异相对较小，分别达到：0.151，0.127；哨平试验场的格木的树高及枝下高生长分别极显著和显著大于其他3个林分，胸径生长与白云1相差1.71 cm，与其他2个林分无显著差异，分类等级无显著差异，说明哨平试验场的格木人工林在4个林分中生长最好。因此，加大格木林个体选优工作以及无性繁殖研究力度对解决格木个体生长差异大和资源稀少的现状具有重要意义。

Growth divergence of target trees in different stands of Erythrophleum fordii Oliv. plantations

In order to study the individual differences of Erythrophleum fordii Oliv. plantations, to provide theory basis for selection and vegetative propagation, selected the target trees of Erythrophleum fordii Oliv. plantations planted in 1982 in Baiyun and Shaoping test site of the Experimental Center of Tropical Forestry, Chinese Academy as the research object, measuring the DBH, tree height, under branch height and Kraft ＇ s class of Erythrophleum fordii Oliv. to analysis the coefficient of divergence in different stands, and the growth differences between these stands. The results showed that, the coefficient of divergence in under branch height and Kraft ＇ s class of dominant trees in four stands of Erythrophleum fordii Oliv. plantations was large, they were 0.220 and 0.360, the coefficient of divergence in the DBH and tree height was smaller than the under branch height and Kraft ＇ s class, reached 0.151, 0.127 respectively. The difference of tree height and under branch height of Erythrophleum fordii Oliv. between the 4 stands were extremely significant and significant. The DBH distance between Shaoping test site and Baiyun1 was 1.71 cm, no significant difference to the two other stands. And also no significant in the difference of Kraft ＇ s class among the 4 stands. So Erythrophleum fordii Oliv. in Shaoping test site grew best among the four stands of Erythrophleum fordii Oliv.. According to the results of this study and the current situation of Erythrophleum fordii Oliv., indicated the importance and urgency of the study of selection and vegetative propagation.