擎天树树皮率·心材率及木材密度研究

目的]弄清擎天树的木材材性。方法]从南宁市广西良凤江国家森林公园采集1978年栽培的擎天树为试材,采用排水法测定生材体积,采用体积法及质量法测定树皮率,研究擎天树的密度、树皮率、生材含水率及心材率。结果]擎天树的生材密度随着树高增加而减小,枝下高以上变化不大,平均值为1.079 g/cm3;基本密度随着树龄增加而增大,纵向变化随着树高增加而减小,枝下高以上变化不大,平均值为0.578 g/cm3;生材含水率从髓心向外呈减小的趋势,并随树高增加,呈小-大-小-大的趋势,平均值为87.8%;树皮体积百分率和质量百分率均随树高增高而增加,平均值分别为19.1%和20.1%;心材率随树高增加而减少,平均值为13.9%。结论]该研究为保护我国珍稀树种擎天树提供了科学依据。

Research on Bark Percentage,Heartwood Percentage and Wood Density of Shorea chinensis

Objective] The study aimed to make clear the wood property of Shorea chinensis.Method] S.chinensis planted in 1978 was selected from Fengjiang National Forest Park of Guangxi in Nanning City,the green wood volume were determined by the drainage method and the bark percentage was determined by the volume method and the quality method so as to study the density,bark percentage,moisture content and heartwood percentage of the green wood of S.chinensis.Result] The green wood density of S.chinensis was reduce...