大花序桉种源间木材物理性质变异研究  

Research on Wood Physical Property Variation Among Provenances of E.cloeziana

作　　者：项东云[1] 陈健波[1] 申文辉[1] 周维[1] 阚荣飞[2] 

机构地区：[1]广西林业科学研究院,南宁530001 [2]广西大学林学院,南宁530004

出　　处：《广西林业科学》2008年第2期57-65,共9页Guangxi Forestry Science

基　　金：中澳越技术合作项目"通过遗传改良与栽培措施提高桉树木材价值研究"

摘　　要：以广西东门林场18年生的11个大花序桉(Eucalyptus cloeziana)种源木材为研究对象,对它们的木材基本密度、弦向干缩率、径向干缩率等物理性质进行了测定分析,发现不同种源间、相同种源不同树干高度间所测定的物理性质指标均存在显著的差异。木材基本密度最大的种源是B85,然后依次是D47、B82,其值分别是0.7530、0.7386、0.7274 g/cm3;参试的11个种源中有8个种源的差异干缩都小于1.5,属于差异干缩小的类型;只有14425、12195和B55这3个种源的差异干缩超过1.5,但小于1.6,属于差异干缩中等类型;种源的树高、胸径生长性状与木材基本密度、差异干缩、体积全干缩率物理性状相关关系不密切,据此分别对树高、胸径等生长性状和木材基本密度、干缩率等木材物理性状进行独立选择可望获得较好的生长、物理性状改良效果。Woods of 11 E. cloeziana provenances aged 18 in Dongmen Forest Farm of Guangxi were taken as research objects, and such physical properties as basic density, tangential dry shrinkage and radial dry shrinkage were tested and analyzed. It has been found that physical property indicators among different provenances or different stem heights within the same provenance displayed obvious variation. The largest basic density was with provenance 1385, followed by D47 and 1382 with the respective value of 0.7530 g/cm^3, 0.7386 g/cm^3 and 0. 7274 g/cm^3. Among the 11 tested provenances, there were 8 provenances whose ratio of tangential shrinkages to radial shrinkages was less than 1.5, belonging to the type of small difference shrinkage. Only such 3 provenances as 14425, 12195 and 1355 were with the ratio larger than 1.5 but smaller than 1.6, belonging to the type of medium difference shrinkage. Growth properties such as tree heights and DBH were not closely related to such physical properties as wood basic density, difference shrinkage and volume shrinkage rate. Based on this, independent selection of growth properties and physical properties were expected to generate improved effects. Key

关 键 词：大花序桉 木材物理性质 

分 类 号：S781.2[农业科学—木材科学与技术]