不同林龄尾巨桉生材性质变异分析  

Analyses of Wood Property Variation Among Eucalyptus urophylla×E.grandis of Different Ages

作　　者：吕曼芳 戴军 李元强 韦林宏 黄家华 黄腾华[2] LV Manfang;DAI Jun;LI Yuanqiang;WEI Linhong;HUANG Jiahua;HUANG Tenghua(Guangxi State-owned Weidu Forest Farm,Laibin 546100,Guangxi,China;Guangxi Forestry Research Institute,Nanning 530002,Guangxi,China)

机构地区：[1]广西国有维都林场,广西来宾546100 [2]广西林业科学研究院,广西南宁530002

出　　处：《桉树科技》2021年第2期17-22,共6页Eucalypt Science & Technology

基　　金：广西林科院基本科研业务费项目“速生桉木材6种机械加工性能参数”(林科[2018]26号)。

摘　　要：为了解不同林龄尾巨桉无性系木材生材性质的变异规律,本文以广西维都林场5年生和7年生尾巨桉木材为研究对象,采用解析木取样方法,对两个林龄尾巨桉的树皮率、生材含水率、生材密度、基本密度等生材性质进行测定,并分析其主要变异规律。结果表明:5年生尾巨桉的树皮体积百分率、树皮质量百分率、生材含水率、生材密度和基本密度平均值分别为16.24%、15.77%、135.5%、1.077 g·cm^(-3)、0.424 g·cm^(-3);7年生尾巨桉的树皮体积百分率、树皮质量百分率、生材含水率、生材密度和基本密度平均值分别为13.64%、13.41%、145%、1.093 g·cm^(-3)、0.438 g·cm^(-3)。不同林龄尾巨桉由树干根部至稍部,树皮体积百分率和质量百分率均先减小后增大;生材含水率呈逐渐减小;生材密度和基本密度均逐渐增大。方差分析表明,尾巨桉不同树干高度间的树皮体积百分率、树皮质量百分率、生材含水率、生材密度、基本密度差异均显著或极显著;不同林龄间差异均不显著。To understand the variation of wood properties of Eucalyptus urophylla×E.grandis at different ages,wood samples were collected from 5-year-old and 7-year-old trees of an E.urophylla×E.grandis clone.The bark percentage,water content of green wood,green density and basic density of the two trees were measured by analytical wood sampling methods,and variation in the key attributes were analyzed.The results showed that the average values of bark percentage,water content of green wood,green density and basic density of wood from the 5-year-old tree were 16.24%,15.77%,135.5%,1.077 g·cm^(-3),0.424 g·cm^(-3) while from the 7-year-old tree were 13.64%,13.4%,145%,1.093 g·cm^(-3) and 0.438 g·cm^(-3) respectively.The volume percentage and bark percentage of the wood of the E.urophylla×E.grandis clone at different ages decreased at first and then increased from the base of the trunk to the upper bole;moisture content of green wood decreased gradually whilst the green density and basic density of wood increased gradually.Variance analysis showed that there were significant or extremely significant differences in bark volume percentage,bark mass percentage,green wood moisture content,green wood density and basic density among different trunk heights of E.urophylla×E.grandis,and that there were no significant differences among the two tree ages.

关 键 词：尾巨桉 树皮率 生材含水率 生材密度 基本密度 

分 类 号：S781.2[农业科学—木材科学与技术]