针叶树材组织率的分析

用体视显微技术研究了6科18属42种针叶树材的组织率,结果表明:随着胞壁率增大,木材实质密度增大,而木材孔隙率减小;62%的树种管胞胞壁率大于90%,表明管胞是针叶树材木材加工和利用的主体;管胞壁腔比小于1的树种占90%以上,说明适合于造纸和纤维工业用材;轴向薄壁组织和木射线组织的体积率较少,分别为2.9%和5.0%。这一结果为木材材性的分析、科学加工和高效利用提供基础数据。

Tissue Ratio of Conifer Wood

An experiment was conducted to study the wood tissue ratio of 42 species of conifers belonging to 18 genera and 6 families using stereological microscopy.Result showed that with the increase of fiber wall ratio,the density of wood substance increases,while the void volume fraction of wood decreases.Tracheid is the main part of conifer wood in processing and utilization judging from the fact that the fiber wall ratio of wood tracheid from 62 percent of conifers is larger than 90%,and over 90 percent of conifers are suitable to be used as pulpwood and industrial timber in terms of the ratio of tracheid wall thickness to cell size less than 1.The volume fractions of longitudinal parenchyma and multiseriate rays are 2.9% and 5.0%,respectively.The result provides some basic data for wood property analysis,scientific processing and high-efficiency utilization of conifer wood.