| 摘要: |
| 【目的】了解四川产蓝桉人工林木材的解剖性质及其变异规律，为其培育和利用提供依据。【方法】以采自四川雅安的5株5年生蓝桉为试验材料，在不同高度按生长轮截取试材，通过离析法和永久切片法对试材导管和纤维形态特征进行测定。【结果】导管长度、宽度（径向直径）、长宽比、弦向直径均值分别为410.13 μm，141.24 μm，2.90，89.25 μm；纤维长度、宽度、长宽比、壁厚、腔径、壁腔比均值分别为910.27 μm，17.79 μm，50.85，3.47 μm，10.48 μm，0.67；除了纤维壁厚和壁腔比从髓心向外呈减小规律之外，其余导管形态和纤维形态指标径向变异规律一致，都从髓心向外呈增加趋势；轴向变异规律较为复杂，导管长度、纤维长度等指标规律性较强，随树干高度的增加呈先增后减的变异规律，其他指标变异规律不明显。【结论】获得了四川产5年生蓝桉人工林木材解剖性质及其变异规律，其解剖指标满足制浆造纸的要求。 |
| 关键词: 蓝桉 木材 解剖性质 变异规律 |
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| 基金项目:四川省高等学校重点实验室项目“木材工业与家具工程” |
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| Variation in anatomical properties of Eucalyptus globulus juvenile wood from Sichuan |
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LUO Hao,QI Jin-qiu,XIE Jiu-long,et al
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| Abstract: |
| 【Objective】This study investigated the variations in anatomical properties of Eucalyptus globulus from Sichuan to improve its cultivation and utilization.【Method】Five 5-year-old E.globulus harvested from Ya’an,Sichuan were selected and their fiber and vessel morphologies at different heights along annual rings were investigated using isolation and permanent section methods.【Result】The vessel length,width (radial diameter),length-width ratio,and tangential diameter were 410.13 μm,141.24 μm,2.90,and 89.25 μm,respectively.The fiber length,width,length width ratio,cell wall thickness,cavity diameter,and cell wall thickness-lumen diameter were 910.27 μm,17.79 μm,50.85,3.47 μm,10.48 μm,and 0.67,respectively.All the property indexes except cell wall thickness and cell wall thickness-cavity diameter showed same increasing trend that they increased radially from pith to bark.Longitudinal variations of fiber and vessel morphologies were complex.Vessel and fiber length showed significant variations namely increased first and then decreased with the increase of tree height while others showed no regular changes.【Conclusion】The anatomical properties and their variations of 5-year-old E.globulus from Sichuan were obtained and they satisfied the requirement of papermaking. |
| Key words: Eucalyptus globulus wood anatomical properties variation |
