3种不同树龄桉树无性系木材纤维特性研究  

Study on Wood Fiber Characteristics of Three Eucalypt Clones at Different Ages

作　　者：蒙芳慧 李起泽 陈松武 刘晓玲[1] 陈桂丹[1] 林家纯 Meng Fanghui;Li Qize;Chen Songwu;Liu Xiaoling;Chen Guidan;Lin Jiachun(Guangxi Forestry Research Institute,Guangxi Quality Control of Wood Resources Cultivation Research Center of Engineering Technology,Nanning,Guangxi 530002,China;Guangxi State-owned Gaofeng Forest Farm,Nanning,Guangxi 530001,China)

机构地区：[1]广西壮族自治区林业科学研究院、广西木材资源培育质量控制工程技术研究中心,广西南宁530002 [2]广西壮族自治区国有高峰林场,广西南宁530001

出　　处：《广西林业科学》2023年第3期394-399,共6页Guangxi Forestry Science

基　　金：广西林业科技推广示范项目(2023GXLK03);广西林科院基本科研业务费专项(林科202104号);广西创新驱动发展专项资金项目(桂科AA17204087-12)。

摘　　要：为了解不同树龄桉树无性系木材的纤维特性,以尾巨桉DH32-26(Eucalyptus urophylla×E.grandis DH32-26)、尾巨桉DH32-29(E.urophylla×E.grandis DH32-29)和巨尾桉广林9号(E.grandis×E.urophylla GLGU9)3种桉树无性系为材料,分别测试其4年生、6年生和8年生木材的纤维长度、纤维宽度、纤维长宽比和纤维壁厚,对其木材纤维特性进行研究。结果表明,3种桉树无性系木材的纤维长度和纤维壁厚均随树龄增加逐渐增加,径向上(自髓心向外)呈增加趋势;木材纤维宽度随树龄增加略有增加,变化不大,径向上(自髓心向外)逐渐增加。3种桉树无性系木材的纤维长宽比变化规律基本一致,均随树龄增加缓慢增大后小幅度波动,径向上(自髓心向外)增大。不同树龄间,尾巨桉DH32-26和DH32-29木材纤维长度、尾巨桉DH32-26木材纤维宽度及巨尾桉广林9号木材纤维壁厚均差异极显著;巨尾桉广林9号木材纤维长度、尾巨桉DH32-29木材纤维宽度及尾巨桉DH32-26和DH32-29木材纤维壁厚均差异显著;巨尾桉广林9号木材纤维宽度差异不显著。巨尾桉广林9号木材的整体纤维特性略优于尾巨桉DH32-26和DH32-29。In order to understand wood fiber characteristics of eucalypt clones at different ages,taking Eucalyp⁃tus urophylla×E.grandis DH32-26,E.urophylla×E.grandis DH32-29 and E.grandis×E.urophylla GL⁃GU9 as materials,fiber length,fiber width,fiber length-width ratio and fiber wall thickness of 4-year-old,6-year-old and 8-year-old woods were measured respectively to study their wood fiber characteristics.Results showed that with increase of age,wood fiber lengths and fiber wall thicknesses of three eucalypt clones in⁃creased gradually,and showed increasing trends in radial direction from pith center to outside.With increase of age,wood fiber widths increased slightly with little changes,and increased in radial direction from pith center to outside.Changes of wood fiber length-width ratios of three eucalypt clones were basically the same.With in⁃crease of age,wood fiber length-width ratios increased slowly and then fluctuated to small extent.Among different ages,there were extremely significant differences in wood fiber lengths of E.urophylla×E.grandis DH32-26 and DH32-29,woodfiberwidthofE.urophylla×E.grandis DH32-26andwoodfiberwallthicknessofE.grandis×E.urophylla GLGU9,and significant differences in wood fiber length of E.grandis×E.urophylla GLGU9,wood fiber width of E.urophylla×E.grandis DH32-29 and wood fiber wall thicknesses of E.urophylla×E.grandis DH32-26 and DH32-29.There was no significant difference in wood fiber width of E.grandis×E.urophylla GLGU9 among different ages.Wood fiber characteristics of E.grandis×E.urophylla GLGU9 were better than E.urophylla×E.grandis DH32-26 and DH32-29.

关 键 词：桉树 无性系 树龄 木材纤维特性 

分 类 号：S792.39[农业科学—林木遗传育种]