【摘要】 研究比较了三个速生树种的幼龄材构造特征。结果表明:1)湿地松树脂道大而多,马尾松多而小,火炬松少而较大,证实湿地松为著名的采脂材;2)马尾松管胞长度最长,纤丝角最小,基本密度最高,湿地松次之,火炬松最差,预估马尾松强度最高;3)火炬松生长最快,晚材率最低,湿地松次之,马尾松生长较慢,火炬松更宜作纤维原料。更多还原

【Abstract】 This paper deals with the comparison of anatomic features in juvenile wood of three pines. The study shows that: (1) slash pine is proved a noted resin tapping tree because of its biggest and most abundant resin canals; (2) masson pine is regarded as the strongest because of its longest tracheids smallest microfibril angle and largest specific gravity; (3) owing to its fastest growth rate and smallest proportion of late wood, loblolly pine is good for pulping wood.更多还原