香梓楠树皮率、生材含水率及木材密度研究

Bark Percentage,Green Wood Moisture Content and Wood Density of Micelia hedyosperma Law

采用体积法及质量法测定树皮率,排水法测定生材体积,分析研究香梓楠的树皮率、生材含水率、密度及心材率。研究结果表明:香梓楠树皮体积百分率及质量百分率总体随着树高的增加而增加,树皮体积百分率及质量百分率平均值分别为15.8%和19.8%;生材含水率,从髓心向外,北向和南向均呈减少的趋势,并随树高增加而增加,平均值为99.5%;香梓楠生材密度随树高增加而减小,平均值为0.804g·cm-3;基本密度的径向变化随树龄增加而增大,纵向变化随树高增加而减小,平均值为0.403g·cm-3;11年生香梓楠心材极少。该研究为保护、发展广西重点珍贵树种香梓楠提供了科学依据。

To study the wood property of Micelia hedyosperma Law, the bark percentage was deter- mined by the volume method and the quality method, and the green wood volume were determined by the drainage method. Then, the bark percentage, moisture content, density and heartwood percent- age of Micelia hedyosperma Law were determined. The bark volume percentage and bark quality per- centage increased with the increase of height, 15.8% and 19.8% on average respectively. The mois- ture content of green wood showed a decreasing trend in the north and south orientation from the pith to the sapwood and increased with the height, with the average at 99.5%. While green wood density decreased with the height, with the average value at 0. 804 g · cm^-3. The radial change of the basic density was increased with the increase of tree age , whereas the vice verse along the longitudinal ori- entation, with the average value at 0. 403 g · cm-3. There is almost no heartwood formed for Micelia hedyosperma Law at the age of 11.