10年生杂交桉无性系生长及木材密度变异研究  

Studies on the Growth and Variation of Wood Density of 10 Years Old Hybrid Eucalyptus Clones

作　　者：熊涛 覃林波 夏勚 周本亮 覃汉夫 兰俊 XIONG Tao;QIN Linbo;XIA Yi;ZHOU Benliang;QIN Hanfu;LAN Jun(Guangxi Dongmen State-owned Forest Farm,Fusui 532108,Guangxi,China)

机构地区：[1]广西国有东门林场,广西扶绥532108

出　　处：《桉树科技》2019年第1期14-18,共5页Eucalypt Science & Technology

基　　金：广西科技计划项目"桉树定向目标优质无性系选育与栽培"(桂科AB16380036)

摘　　要：对10 a生杂交桉无性系试验林进行生长性状及木材基本密度分析,结果表明:试验林分树高、胸径、材积、枝下高、干形指数均值分别为17.64 cm、23.22 m、0.332 6 m^3、11.55 m、3.36,各无性系5项测定指标存在极显著差异。材积均值指标中,GL9排名第1,最差为SH1。林分林木生材密度均值为1.213 1 g·cm^(-3),变异系数为7.54%;基本密度均值为0.537 8 g·cm^(-3),变异系数为5.41%。基本密度范围主要集中在0.474 5～0.610 4 g·cm^(-3),径向上基本密度整体上表现为边材密度>中材密度>心材密度的变化规律。This paper analyzes growth traits and wood basic densities of 10-year-old hybrid Eucalyptus clones.The average tree height,DBH,volume,branch height and stem form index were 17.64 cm,23.22 m,0.332 6 m^3,11.55 m and 3.36 respectively.There were significant differences in the five indicators.Among the mean volume,clone GL9 ranked first while clone SH1 was the lowest.The average green wood density across all clones was 1.213 1 g·cm^-3,with a coefficient of variation of 7.54%,while the average basic wood basic density was 0.537 8 g·cm^-3 with a coefficient of variation of 5.41%.Wood basic densities ranged from in 0.474 5 to 0.610 4g·cm^-3,and the variation of this latter trait in a radial direction inward from the bark conformed to a pattern of sapwood>middle wood>heartwood basic density.

关 键 词：杂交桉无性系 基本密度 变异 

分 类 号：S722.33[农业科学—林木遗传育种]