毛竹含水率、基本密度和干缩性的变异规律  

Variation patterns of moisture content,basic density and dry shrinkage of Phyllostachys pubescens.

作　　者：钟莎[1,2] 张双保[1] 覃道春[2] 罗朝晖[3] 

机构地区：[1]北京林业大学材料科学与技术学院,木材科学与工程北京市重点实验室,木质材料科学与应用教育部重点实验室,国际竹藤网络中心 [2]国际竹藤网络中心 [3]中国林业科学研究院木材工业研究所

出　　处：《北京林业大学学报》2009年第S1期185-188,共4页Journal of Beijing Forestry University

基　　金："十一五"国家科技支撑计划项目(2006BAD19B04);"948"国家林业局引进项目(2008-4-73)

摘　　要：为探讨竹材在使用中易开裂的问题,该文对毛竹的开裂机理进行了初步的研究。以2008年4月采于安徽省旌德县的4年生毛竹材为研究对象,分析了毛竹生材的含水率、基本密度和干缩性的变异规律。结果表明:毛竹生材含水率沿高度方向呈下降趋势,基本密度沿高度方向呈上升趋势;在非竹节部位,干缩率弦向>径向>纵向;弦向干缩率靠近竹青部位>靠近竹黄部位;随着生材含水率的降低或基本密度的增大,弦向干缩率有下降趋势,而径向干缩率有上升趋势。To discuss the problem that bamboo is very easy to split during using it,the paper studies the splitting principle of Phyllostachys pubescens.The variation patterns of moisture content(MC),basic density and dry shrinkage of four-year-old P.pubescens,which was cut from Jingde County,Anhui Province in April 2008,were studied.The results showed that: MC went down along the height direction,while the basic density went up;dry shrinkage of bamboo culms without bamboo joints in tangential direction was bigger than that in other directions,and the smallest one was in the lengthwise;dry shrinkage in tangential direction outside was bigger than that of the inside;with the basic density increasing and MC of green bamboo decreasing,for dry shrinkage,there was a decreasing trend in radial direction and an increasing trend in radial direction.

关 键 词：毛竹 含水率 基本密度 干缩性 

分 类 号：S795[农业科学—林木遗传育种]