文献类型：期刊文献

中文题名：杂种桉无性系不同树干高度材性变异分析

英文题名：Variation analysis on wood properties of for hybrid Eucalyptus clones of different height

作者：吴世军[1] 陈广超[2] 徐建民[1] 李光友[1] 宋佩宁[1] 郭文仲[1]

第一作者：吴世军

机构：[1]中国林科院热带林业研究所;[2]广东省岭南综合勘察设计院

年份：2018

卷号：47

期号：1

起止页码：48-53

中文期刊名：福建农林大学学报：自然科学版

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2017_2018】；

基金："十二五"农村领域国家科技计划资助项目(2012BAD01B0401)

语种：中文

中文关键词：杂种桉;无性系;材性性状;变异分析

外文关键词：hybrid Eucalyptus ; clone ; wood traits ; variation analysis

分类号：S722.33

摘要：对建立在江门罗坑镇的8.5年生桉树(Eucalyptus)杂种无性系进行材性测定分析.方差分析结果表明:单株材积、木材密度、纤维长度、纤维宽度和树皮厚度在无性系间差异极显著;单株材积和树皮厚度在重复间差异不显著,木材密度和纤维长度在重复间差异极显著,纤维宽度在重复间差异显著;树皮厚度在不同高度间差异极显著,木材密度差异显著,纤维长度和宽度差异不显著.从参试无性系不同树干高度的材性均值可以看出:不同无性系的木材密度、纤维长度和树皮厚度变异规律均不同,开展木材利用时无需考虑木材位置;纤维宽度随树干高度呈递减趋势,树干位置可予以考虑;树皮厚度的最大值均出现在树干基部.总体而言,木材密度范围主要集中在0.42~0.52 g·cm^(-3),纤维长度主要集中在0.4~0.8 mm,纤维宽度主要集中在15~21μm,树皮厚度主要集中在2~4 cm.DH32-29木材密度随着高度变化在9~11 m有所增加;纤维长度随着树干高度变化较大,2.6、3.9和14.3 m的纤维长度较大,9.1 m处出现最小值;纤维宽度随着树干高度变化较大,2.6、3.9和15.6m的纤维宽度较大,6.5 m处出现最小值;2.6 m以下的树皮厚度在4 cm以上,2.6 m以上树皮厚度下降至2.2 cm左右.
Twenty-four 8.5 a hybrid Eucalyptus clones were sampled at Luokeng town,Jiangmen City,and wood properties were as-sessed. Analysis of variance showed that volume of timber, basic density, fiber width and bark thickness all varied significantly amongclones. Among repeat,basic density and fiber length varied significantly whereas volume of timber and bark thickness were the same. Among height,bark thickness and basic density varied significantly but timber length and width were the same. Overall evalu-ation referred that wood properties varied among clones wood position should be taken into consideration during processing,such as fiber width decreased with branch height so that trunk can be good candidate as timber. And bark thickness often maximized at the bottom. In general,basic density,fiber length,fiber width and bark thickness ranged from 0.42-0.52 g ？ cm 3, 0.4 - 0.8 mm,15 - 21 ^m and 2-4 cm, respectively. The basic density of DH32-29 was higher at height between 9 m and 11 m,and fiber length were higher at heights of 2.6, 3.9 and 14.3 m while lower at 9.1 m. Fiber width was higher at heights of 2.6, 3 .9 ,and 15.6 m while lower at height of 6.5 m. Bark thickness was about 4 cm under 2.6 m while dropped to 2.2 cm at height above 2.6 m.