大花序桉和火力楠木材物理力学性质比较

2014年以福建省漳州市龙海九龙岭国有林场12年生的大花序桉(Eucalyptus cloeziana)人工林为研究对象,并以乡土树种23年生的火力楠(Michelia macclurei)人工林为对照,对大花序桉和火力楠木材的物理性质和力学性质进行比较测定。结果表明,大花序桉、火力楠的木材气干密度分别为0.78、0.58 g·cm^-3,弦向的全干时干缩率分别8.8%、6.8%,弦向的吸水后湿涨性分别为9.7%、7.3%,综合强度分别为203.7、154.6 MPa。说明大花序桉的木材密度和综合强度大于火力楠,但在干缩率和湿胀性方面略逊于火力楠。与福建主要造林树种比较,大花序桉和火力楠的物理力学综合评分高于其它树种,具有较高的木材利用价值。

Comparison on Wood Physical and Mechanical Properties of Eucalyptus cloeziana and Michelia macclurei

The wood physical and mechanical properties of 12 years Eucalyptus cloeziana and 23 years native species Michelia macclurei plantations of Jiulongling State Forest Farm in Longhai were determined in 2014 for stand management and application of wood.The results showed that the air-dried wood density of Eucalyptus cloeziana and Michelia macclurei were 0.78 g·cm^-3 and 0.58 g·cm^-3,respectively.The oven shrinkage rate in chord direction of Eucalyptus cloeziana and Michelia macclurei were 8.8%and 6.8%,respectively.The swelling properties after water absorption of Eucalyptus cloeziana and Michelia macclurei were 9.7%and 7.3%,respectively.The comprehensive strength of the wood of Eucalyptus cloeziana and Michelia macclurei were 203.7 MPa and 154.6 MPa,respectively.The wood density and comprehensive strength of Eucalyptus cloeziana are higher than that of Michelia macclurei,but it is slightly inferior to Michelia macclurei in terms of shrinkage rate and swelling properties.Compared with the main afforestation tree species in Fujian Province,Eucalyptus cloeziana and Michelia macclurei have higher scores of physical and mechanical than that of other tree species.Therefore,they have higher wood utilization value.