高产脂马尾松间伐材的材性分析  

Analysis on basic properties of Pinus massoniana thinning wood with high-yield rosin

作　　者：胡拉 徐慧兰[1,2] 冯源恒 杨章旗[1,3] HU La;XU Huilan;FENG Yuanheng;YANG Zhangqi(Guangxi Forestry Research Institute,Nanning,Guangxi 530002,China;Engineering Research Center of Masson Pine of Guangxi,Nanning,Guangxi 530002,China;Engineering Research Center of Masson Pine of State Forestry Adminstration,Nanning,Guangxi 530002,China)

机构地区：[1]广西壮族自治区林业科学研究院,广西南宁530002 [2]广西马尾松工程技术研究中心,广西南宁530002 [3]国家林业局马尾松工程技术研究中心,广西南宁530002

出　　处：《森林与环境学报》2018年第3期290-296,共7页Journal of Forest and Environment

基　　金：国家科技支撑计划项目"南亚热带马尾松高产脂及材脂兼用林培育技术研究"(2015BAD09B0102-2)

摘　　要：以子代测定林为样本,研究了高产脂马尾松间伐材的基本材性及其在径向、纵向的变异,分析了材性指标间的相关性。结果表明,木材的生长轮宽度和晚材率分别为6.64 mm、9.44%,基本密度和绝干密度分别为0.33、0.36 g·cm^(-3),平均纵向、径向、弦向和体积全干干缩率分别为0.43%、2.81%、4.94%、8.02%,早材(晚材)管胞的长度、直径、壁厚、长径比、壁腔比和柔性系数分别为2.68 mm(3.12 mm)、40.70μm(33.24μm)、4.60μm(7.08μm)、64.98(92.90)、0.31(0.83)、77.14(57.26)。与近髓心部位相比,近树皮部位木材密度较高,管胞壁厚且较细长,纵向干缩小而体积干缩大;沿树干基部至树梢部位,木材密度变小,弦向、径向和体积干缩率呈减小趋势,管胞形态各项指标总体呈先增加后减小的趋势。晚材率与木材密度、木材干缩性显著相关,木材密度与弦向全干干缩率、体积全干干缩率、早材管胞直径和早材管胞长径比显著相关。The basic properties of Pinus massoniana thinning wood with high-yield rosin from progeny test forest were investigated,and their variation in both radial and longitudinal directions were discussed,then the correlation among the properties was analyzed.The results showed that the annual ring width and latewood rate were 6. 64 mm and 9. 44%,respectively. The basic density and oven-dry density were 0.33 and 0.36 g·cm^（-3）,respectively. The longitudinal,radial,tangential and volume oven-dry shrinkage were0.43%,2.81%,4.94% and 8. 02%,respectively. The length,diameter,wall thickness,length/diameter,wall thickness/lumen diameter and flexible coefficient of the earlywood（ latewood） were 2. 68 mm（ 3. 12 mm）,40. 70 μm（ 33. 24 μm）,4. 60 μm（ 7.08 μm）,64.98（ 92.90）,0.31（ 0.83） and 77.14（ 57.26）,respectively. Compared with the properties of wood nearby core,wood nearby bark showed higher density,thicker and slenderer cell wall,smaller oven-dry longitudinal shrinkage,and larger oven-dry volume shrinkage. Along the longitudinal direction from trunk base to treetop,the wood density as well as the tangential,radial and volume oven-dry shrinkage decreased,and the indexes of tracheid morphology generally first increased and then decreased. The latewood rate was significantly correlated with wood density and oven-dry shrinkage,while the wood density was significantly correlated with oven-dry tangential shrinkage,oven-dry volume shrinkage,and diameter and length/diameter of earlywood tracheids.

关 键 词：马尾松 高产脂 间伐材 材性 相关性分析 

分 类 号：S781.3[农业科学—木材科学与技术]