采伐方式对速生桉木材变形与开裂的影响  

Effect of Logging Mode on the Deformation and Cracking of Eucalyptus Wood

作　　者：韦中绵 蓝建华 韦鹏练[3] 符韵林[3] WEI Zhong-mian;LAN Jian-hua;WEI Peng-lian;FU Yun-lin(Nanning Arboretum of Guangxi,Guangxi Zhuang Autonomous Region,Nanning 530031,China;Guangxi Beibu Gulf Airlines,Guangxi Zhuang Autonomous Region,Nanning 530048,China)

机构地区：[1]广西南宁树木园 [2]Guangxi Beibu Gulf Airlines [3]广西大学林学院

出　　处：《林产工业》2018年第9期33-35,共3页China Forest Products Industry

基　　金：广西科技重大专项(桂科AA17204065-14)

摘　　要：桉树木材易变形、开裂,对其加工和利用影响较大。通过采用3种不同的采伐方式,即环割后伐倒造材,伐倒后留冠放置再造材,按传统的采伐方式采伐后直接造材,探讨了采伐方式对速生桉木材变形与开裂的影响。结果表明:在3种不同的采伐方式中,伐倒留冠处理的开裂及翘曲程度最轻,环割处理的开裂情况最严重。伐倒留冠9 d后造材的裂纹比值比采伐后直接造材的下降了76.48%;伐倒留冠29 d后造材的锯材翘曲度比采伐后直接造材的下降了45.24%。说明伐倒留冠的采伐方式能有效减轻速生桉树木材的开裂和变形。Eucalyptus wood is easy to deform and crack,which has great influence on its processing and utilization.The effect of logging mode on the deformation and cracking of fast-growing eucalyptus wood was discussed through three different cutting modes,namely felling and bucking after ring cutting treatment,keeping the crown for a while after the tree was cut down and then bucking,bucking directly after felling.The results showed that the second mode had a lowest cracking and warping degree,while the first mode had a severely cracking flaw.Compared to the third logging mode,there was a 76%decline in cracking rate of raw wood and a 44%reduce in warping degree of sawn lumber when bucking operation was carry out after keeping the crown for 9 days and 29 days respectively.All the results indicated that the logging mode that keeping the crown for a while after the tree was cut down and then bucking had a positive effect on reducing the cracking and deformation of fast-growing eucalyptus wood.

关 键 词：巨尾桉 采伐方式 开裂 变形 

分 类 号：S781.2[农业科学—木材科学与技术]