摘要
本文主要研究了马尾松间伐材的纤维形态、化学成分及主要物理力学性质，并与成熟材进行了比较．结果表明，间伐材管胞显著较短、宽度窄、胞壁较薄，长宽比明显较大，纤维素含量略高而木素和浸提物含量较低．年轮较窄、晚材率大．生材含水率低，干缩性小．气干密度、顺纹抗压强度、抗弯强度和抗弯弹性模量与成熟材差异不显著，冲击韧性明显较大．同时对间伐材中应力木的超微构造和材性。
Fiber morphology, chemical composition, main physical and mechanical properties of the thinned wood and mature wood of Pinus massoniana have been studied in this paper The results shows that the thinned wood has shorter and narrower tracheid, thinner tracheid wall, larger radio of length to width of fiber, slightly higher cellulose content, lower lignin and extraneous substance content, lower green moisture content, smaller shrinkage behavior, and stronger toughness than the mature wood's But there is no significant difference in air dried density, parallel to grain compression strength, bending strength and its elastic modulus in static bending condition between the two kinds of woods And, the ultrastructure and main properties from the thinned wood have also been observed and discussed
出处
《福建林学院学报》
CSCD
1999年第2期133-137,共5页
Journal of Fujian College of Forestry
关键词
马尾松
间伐材
应力木
材性
超微构造
Pinus massoniana,thinned wood,stress wood,lumber property
