桉树无性系旋切单板质量对比研究  

Variation in Rotary Peeled Veneer Quality Among Eucalyptus Clones

作　　者：赵英伟 李霞 马忠才 彭智邦 刘金炽 邓家政 王建忠 ZHAO Yingwei;LI Xia;MA Zhongcai;PENG Zhibang;LIU Jinchi;DENG Jiazheng;WANG Jianzhong(Guangxi State-owned Dongmen Forest Farm,Fusui 532108,Guangxi,China)

机构地区：[1]广西国有东门林场,广西扶绥532108

出　　处：《桉树科技》2021年第4期31-35,共5页Eucalypt Science & Technology

基　　金：中央财政林业科技推广示范项目“桉树良种DH32-43产业化示范与推广”(〔2018〕TG 09号)。

摘　　要：本研究以5个6年生桉树无性系DH32-26、DH32-28、DH32-43、DH299-5和DH288-4为研究材料,通过对立木生长性状、原木出材率、出板率和旋切单板质量进行评价,筛选出旋切单板品质最好的桉树无性系。结果表明:5个桉树无性系胸径、树高、枝下高呈极显著差异,树皮厚度呈显著差异;原木出板率呈显著差异;单板质量评价中的活结、死结、裂缝数量及其长度呈极显著差异,单板等级呈极显著差异;树高、材积、枝下高是影响一级板出板率的主要因子,活结数量、死结直径、最长裂缝是影响单板等级的主要因子。桉树各无性系间的差异能影响单板品质,综合得出桉树无性系DH32-43的旋切单板品质最好。This study examined five 6-year-old Eucalyptus clones DH32-26,DH32-28,DH32-43,DH299-5 and DH288-4 for the quality of rotary peeled veneer made from them.Investigation of growth characteristics,wood properties of standing trees,veneer board yields,and quality of the peeled veneer enabled the and Eucalyptus clones with the best quality and yield of rotary peeled veneer to be selected.The results showed that there were significant differences among clones for DBH(Diameter at Breast Height),tree height and under-branch height as there were for bark thickness.Meanwhile,slipknots,dead knots,cracks and their numbers and length in peeled veneer sheets were also found to differ significantly among clones as did average veneer grade.Tree height,volume and under-branch height were found to be the main factors affecting the yield of veneer.Meanwhile,the main factors affecting the grade of veneer obtained from a clone were slipknot number,the diameter of dead knots and the maximum crack length.It was concluded that the differences of growth traits,timber yield and veneer board yield among Eucalyptus clones could all affect the veneer quality.Through comprehensive screening and evaluation,clone DH32-43 was found to provide the best the veneer quality.

关 键 词：桉树无性系 旋切单板 生长性状 单板质量 

分 类 号：S784[农业科学—林学]