不同林分密度对桉树幼林木材材性的影响  

Effects on wood properties of young Eucalypt plantation in different stands density

作　　者：张华林[1] 李天会[1] 吴志华[1] 谢耀坚[1] 韩斐扬[1] 任世奇[1] 

机构地区：[1]国家林业局桉树研究开发中心,广东湛江524022

出　　处：《中南林业科技大学学报》2010年第6期85-91,共7页Journal of Central South University of Forestry & Technology

基　　金：国家"十一五"科技支撑专题"沿海地区抗风折植物物种筛选与快繁技术究"(2006BAD03A0107);国家"十一五"科技支撑"桉树和相思速生丰产林培育关键技术研究与示范"(2006BAD24B02)

摘　　要：对两种桉树无性系(巨细桉DH201-2和尾巨桉DH32-29)在5种不同林分密度下(1250、1657、2500、5000和6667株.hm-2)的木材材性(包括木材基本密度和纤维形态特征)进行了测量和研究分析(纤维形态特征分两种不同材型分析:心材与边材)。结果表明:无性系DH201-2的林分密度3(2 500株.hm-2)木材基本密度最大,为452 kg.m-3,DH32-29以林分密度2(1657株.hm-2)的木材密度最大,为436 kg.m-3;相同无性系相同林分密度下,边材纤维长度比心材纤维长度长,边材长宽比一般比心材长宽比要大,纤维宽度则无显著差异;无性系DH201-2的林分密度3(2500株.hm-2)和林分密度5(6667株.hm-2)是符合林分蓄积量、木材基本密度和纤维长度最大值的组合。By surveying and analyzing the wood properties including wood basic density and fibre morpha（The analysis of fibre morpha was divided into two parts,heartwood and sapwood） of two two-year-old Eucalyptus clones（Eucalyptus grandis×E.tereticornis clone DH201-2 and E.urophylla×E.grandis clone DH32-29） with five stand densities（1 250,1 657,2 500,5 000 and 6 667 trees·hm-2）,the results showed that the wood basic density of DH201-2 reached the maximum of 452 kg·m-3 with stand density of 2 500 trees·hm-2 while DH32-29 came to the maximum of 436 kg·m-3 with stand density of 1 657 trees·hm-2;under the same condition of clone and stand density,the fibre length of sapwood was longer than that of heartwood,so to the length-width ratio,but there were not significant differences of the fibre width between sapwood and heartwood;the stand density of 2 500 and 6 667 trees·hm-2 of DH201-2 were two best combinations which stand volume,wood density and fibre length came up to respective maximum.

关 键 词：桉树无性系 林分密度 材型 木材材性 

分 类 号：S792.39[农业科学—林木遗传育种]