26个桉树无性系纤维形态特征  

Study on Fiber Characteristics of 26 Eucalypt Clones

作　　者：彭智邦 熊涛 石茂鑫 邓冬莲 PENG Zhibang;XIONG Tao;SHI Maoxin;DENG Donglian(Guangxi State-owned Dongmen Forest Farm,Fusui 532108,Guangxi,China;Guangxi State-owned Qipo Forest Farm,Nanning 530225,Guangxi,China)

机构地区：[1]广西国有东门林场,广西扶绥532108 [2]广西国有七坡林场,广西南宁530225

出　　处：《桉树科技》2023年第2期85-92,共8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：采用过氧化氢-冰醋酸法解析木材,分析26个桉树无性系纤维形态变异特征,以期为给桉树材性定向改良提供科学依据。结果显示:纤维长度、宽度、双壁厚、长宽比和壁腔比的变异范围分别为722.99~929.52μm、15.49~18.64μm、6.81~8.56μm、43.02~60.51、0.72~1.26,26个桉树无性系均能满足纤维原材料要求。5个纤维性状在无性系间均存在显著差异,具有较大的选育潜力。DH291-1、DH179-1、DH13-4、DH370-1、DH108-1、DH32-25、DH223-1、DH330-1、DH211-9和DH346-1的木材壁腔比>1,作为中大径材树种培育有更大发展空间。To provide a scientific basis for the directional cultivation of eucalypts with improved wood properties,the fiber characteristics of 26 eucalypt clones were studied by hydrogen peroxide-glacial caeticacid method.The results showed that fiber length,width,double wall thickness,length to width ratio and wall cavity ratio varied within the ranges of 722.99~929.52μm,15.49~18.64μm,6.81~8.56μm,43.02~60.51,0.72~1.26 respectively.It was also found that all 26 eucalypt clones can meet the requirements of fiber raw materials,though there were significant differences for the five fiber traits among the clones,indicating potential for improvement through breeding.Wood wall cavity ratios of the clones DH291-1,DH179-1,DH13-4,DH370-1,DH108-1,DH32-25,DH223-1,DH330-1,DH211-9 and DH346-1 were all˃1,indicating these clones could also be developed for cultivation of medium and large diameter logs for sawn-timber end uses.

关 键 词：桉树无性系 纤维形态 变异 

分 类 号：S781[农业科学—木材科学与技术]