大花序桉种源幼林木材力学性质研究  

Study on Juvenile Wood' s Mechanical Properties of Eucalyptus cloeziana Provenances

作　　者：周维[1] 卢翠香[1] 杨中宁 李昌荣[1] 陈健波[1] 刘媛[1] 项东云[1,3] 

机构地区：[1]广西林业科学研究院国家林业局中南速生材繁育实验室,广西优良用材林资源培育重点实验室,广西南宁530001 [2]广西七坡林场,广西南宁530225 [3]南京林业大学资源与环境学院,江苏南京210037

出　　处：《西南林业大学学报（自然科学）》2014年第6期75-80,共6页Journal of Southwest Forestry University：Natural Sciences

基　　金：中央财政推广项目(桂科攻1123004-3A)资助;广西研究与开发项目(桂科合1347004-3)资助;广西科技厅基本科研业务费专项项目(林科字201203号)资助

摘　　要：通过对广西钦廉林场6年生的9个大花序桉种源木材力学性质进行测定,结果表明,种源间木材顺纹抗压强度、抗弯强度、抗弯弹性模量和抗剪强度差异极显著;4个力学指标群体均值分别为60.272 MPa、127.920 MPa、10.667 GPa、736.987 k N,均达到中等至高级水平;树高、胸径与4个力学指标间存在中等强度以下的负相关,但均未达到显著水平;4个力学指标的广义遗传力分别为0.72、0.79、0.72、0.47;木材综合品质系数为11 084.51×105Pa,属高等级材。大花序桉木材可作为承重结构和高中档家具用材,开发利用该木材作为结构用材,具有现实意义。In Guangxi Qinlian Forest Farm,we selected six-year old Eucalyptus cloeziana from 9 prove-nances as material,analyzed the wood mechanical property.The result showed that differences of compressive strength parallel to grain,bending strength,modulus of elasticity and shear strength were significant among different provenances.The mean value of these four mechanical indexes were 60.272 MPa,127.920 MPa, 10.667 GPa and 736.987 kN,respectively,and all of them reached medium and high level. Tree height,di-ameter at breast height showed moderate-intensity negative correlations with four mechanical indexes,but they were not significant.The broad-sense heritability of four mechanical indexes was 0.72,0.79,0.72 and 0.47,respectively.Comprehensive quality factor of wood was 11 084.51 ×105 Pa,which belonged to high class wood.Wood of Eucalyptus cloeziana could be used as timber of bearing structure and medium and high class furniture.Therefore,developing and using wood of Eucalyptus cloeziana as structural timber has practical significance.

关 键 词：大花序桉 种源 力学性质 遗传变异 综合评价 

分 类 号：S781.2[农业科学—木材科学与技术]