摘要
采用定位观测、野外调查及室内测定等方法,对福建省三明罗卜岩保护区闽桦形态和材性特征进行研究。结果表明,闽桦树高可达40 m、老树树皮纵裂、叶缘具刺芒状规则单锯齿,叶下面仅基部疏生腺点、果穗3~5穗簇生于小枝顶端等形态特征明显区别于亮叶桦树种。闽桦的材性特征测定结果表明,闽桦的气干、全干密度分别为0.683、0.634 g·cm^(-3),其硬度在5796~7775 N之间,闽桦木材材性属于中等偏硬木材,其木材密度中等,差异干缩值较低,具有较好的机械加工和应用性能。
In order to identify the characteristics of Betula fujianensis,features of species and population were studied by located observation,field investigation and laboratory test and other methods.The result showed that morphological characteristics of Betula fujianensis and Betula luminifera were differentiated from height,barks,leaves and fruits in this paper.Material characteristics of Betula fujianensis as high as 40 m,bark longitudinally dehiscent,leaf margin prickly and regular single serrated,basal sparse glandular point below leaf,cluster of 3~5 spikes at top of twigs were determined different from Betula luminifera.The results showed that air-dry density and full density respectively for 0.683 and 0.634 g·cm^(-3),whose hardness was between 5796~7775.The timber of Betula fujianensis middle hard wood density is middle the deformation is small,the machining and application properties of Betula fujianensis are well.
作者
黄茂根
HUANG Maogen(Luoboyan Provincial Nature Reserve,Sanming,Sanming 365000,Fujian,China)
出处
《福建林业科技》
2021年第2期45-47,52,共4页
Journal of Fujian Forestry Science and Technology
基金
福建省属公益类项目(2018R1011-7)
三明市林业科研项目(明林计财(2017)49号)
国家林业局南方山地用材林培育重点实验室、福建省森林培育与林产品加工利用重点实验室项目资助。
关键词
闽桦
形态特征
材质特征
Betula fujianensis
morphological character
material characteristics
