桉树大径材无性系中期选择  

Research on the Medium-term Selection of the Clone of Eucalyptus Timber with Large-diameter

作　　者：李宝琦[1,2] 徐建民[2] 李光友[2] 陆钊华[2] RISTO Vuokko 吴世军[2] 王伟[2] 

机构地区：[1]海南大学农学院,海南儋州571737 [2]中国林业科学研究院热带林业研究所,广东广州510520 [3]广西斯道拉恩索林业有限公司,广西南宁530022

出　　处：《安徽农业科学》2009年第34期17170-17174,17225,共6页Journal of Anhui Agricultural Sciences

基　　金：Stora Enso-Chinese Academy of Forestry (CAF) Research Project in Guangxi;国家十一五科技支持专题(2006BAD01A15-4;2006BAD24B0203)

摘　　要：[目的]寻找在广西山口地区适合桉树大径材培育的优良无性系,探索桉树大径材无性系良种中期选择的可行性和培育潜力。[方法]调查与大径材培育密切相关的20个5.5年生桉树无性系的主要性状,运用方差与相关分析方法,分析无性系间性状的差异,以及各性状间的相互关系。[结果]各性状在无性系间差异均极显著。生长量最优的是DH32-28,其单株材积达0.1262m3,是平均值的131.0%,是最差无性系的198.5%。材质最优的是TH9211-LH5,其木材基本密度与弹性模量分别达0.48g/cm3、6.166GPa,是平均值的116.4%、130.5%,最小值的130.6%、179.5%。应用指数选择法选出各性状指标均优良的5个无性系,分别是DH184-1、DH167-2、DH32-28、DH33-9和DH32-26。[结论]以生产指标、形质指标、材性指标可以选择出适宜做桉树大径材的无性系。[ Objective ] The feasibility of the medium-term selection of the clone of eucalyptus timber with large-diameter and its culturing potential were explored in order to search for the good clone suitable for the culture of eucalyptus timber with large-diameter in the Shankou area of Guangxi province. [ Method ] The main characters of 20 5.5 year-old clones of eucalyptus closely related to the cultivation for large-diameter timber was investigated and the difference among clones and the relation between characters was researched with the method of variance and correlation analysis. [ Results] The difference of the characters among the clones was very significant. The clone-DH32-28 had the optimal plant growth volume with the growth volume of 0. 126 2 m3/plant and its average value of 131.0% , which was 198.5% of the worst clone＇ s. The clone with the optimal timber quality was TH9211-LH5, which basic density and the modulus of elasticity of the wood 0.48 g/cm3 and 6. 166 GPa, respectively, with the average value of 116.4% and 130.5%, and the minimum value of 130.6% and 179.5%. 5 excellent clones： DH184-1, DH167-2, DH32-28, DH33-9 and DH32-26 were selected with the method of index selection, respectively. [ Conclusion] The clone of eucalyptus suitable for large-diameter timber growth was selected according to production targets, the indicator of its shape and quality, and timber character.

关 键 词：桉树 无性系 大径材 木材基本密度 

分 类 号：S792.39[农业科学—林木遗传育种]