【摘要】 树龄与材性关系密切。而速生树种大多着重早期木材利用,因此其影响更大。本文就湛江地区引种的加勒比松,在10年生和15年生时分两次于同一立地采集试材进行材性比较,并与同一立地条件下的同龄马尾松做材性对照。结果显示出,15年生的加勒比松,其管胞长度、壁厚和树脂道含量均较10年生时有较大增长,木材物理力学性质相差更大,前者高于后者30～100％;马尾松木材也有类似趋势。加勒比松早期材性与马尾松比较。除密度、晚材率和年轮宽度较大外,其余性质相差不大。更多还原

【Abstract】 Finns caribaea has been introduced into Zbanjiang Prefecture Guangdong Province in 1964. This species is fast-growing and the trunk of the tree is straight.This article deals with the age differences of lo and 15 year-old Pinus caribaea trees affecting their wood properties. A comparison is to be made between wood properties of Pinus caribaea and Pinus massoniana of the same tree age growing at the same site. Those samples of 10-year-old trees were cut in 1974 , while those of 15-year-old trees in 1979. Both pinus species were grown at the same locality in the forest plantation.The results of this study show that both the tracheid length and the double cell-wall thickness of the 15-year-old trees of the two species are greater than those of their 10-year-old trees. The wood density and strength of the former with an increasing rate of 30-100% and showing atendency to increase with increasing age.As compared with Pinus massoniana, Pinus caribaea grows more quickly and provides a straighter trunk with higher wood density. Other properties show little difference.The results indicate that the wood of Pinus caribaea is suitable for a wide range of uses, e. g. for timber, wood-pulp and resin tapping.更多还原