Study on the Morphology and Tensile Properties of Single Tracheids of Three Softwoods

Qi-ming FENG; Su-hong REN; Jian-xiong LYU; Yu-rong WANG; Yi-chun GONG; Rong-jun ZHAO

doi:10.12326/j.2096-9694.2021045

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Study on the Morphology and Tensile Properties of Single Tracheids of Three Softwoods
1.Research Institute of Wood Industry，Chinese Academy of Forestry，Beijing 100091，China
Vol. 36, Issue 1, Pages: 43-48(2022)
DOI： 10.12326/j.2096-9694.2021045

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冯启明,任素红,吕建雄等.三种针叶树材单根管胞形态与拉伸性能[J].木材科学与技术,2022,36(01):43-48.

FENG Qi-ming,REN Su-hong,LYU Jian-xiong,et al.Study on the Morphology and Tensile Properties of Single Tracheids of Three Softwoods[J].Chinese Journal of Wood Science and Technology,2022,36(01):43-48.
冯启明,任素红,吕建雄等.三种针叶树材单根管胞形态与拉伸性能[J].木材科学与技术,2022,36(01):43-48. DOI： 10.12326/j.2096-9694.2021045.

FENG Qi-ming,REN Su-hong,LYU Jian-xiong,et al.Study on the Morphology and Tensile Properties of Single Tracheids of Three Softwoods[J].Chinese Journal of Wood Science and Technology,2022,36(01):43-48. DOI： 10.12326/j.2096-9694.2021045.

摘要

选取杉木、白皮松、日本落叶松三种针叶树材为研究对象，探究并比较位于不同生长轮的单根管胞的形态参数及拉伸力学性能。结果表明，三种针叶树材的管胞长度、宽度、长宽比及拉伸强度、弹性模量、断裂伸长率基本符合随生长轮增加而增大的变化规律；杉木管胞的长度、宽度最大，日本落叶松晚材第9生长轮的管胞具有最佳的拉伸性能。方差分析表明，杉木和白皮松的第3生长轮与其他生长轮的管胞形态具有显著性差异（,P,＜0.05）。杉木、日本落叶松的第3生长轮与其他生长轮的管胞拉伸力学性能具有显著性差异（,P,＜0.05），而白皮松各生长轮间的拉伸力学性能没有显著性差异。研究结果为人工林木质纤维的高效利用及建筑用材提供依据。

Abstract

The morphological parameters and tensile mechanical properties of single tracheids in different growth rings of Chinese fir (,Cunninghamia lanceolate,), Chinese lace-bark pine (,Pinus bungeana,), and Japanese larch (,Larix kaempferi,) were studied and compared. The results showed that the length, width, ratio of length to width, tensile strength, elongation at break, and the elastic modulus of the tracheids of the three species of softwood nearly increased with growth rings. The length and width of Chinese fir tracheids were the largest, and the mechanical properties of larch latewood from the ninth growth ring tracheids were the best among three species. Analysis of variance showed that the morphologies of tracheids of the third growth ring were significantly different from that of other growth rings (,P,<,0.05) of Chinese fir and Chinese lace-bark pine. There were significant differences in tracheid tensile mechanical properties between the third growth ring and other growth rings of Chinese fir and larch (,P,<,0.05), while there was no significant difference in that among all the growth rings of Chinese lace-bark pine. These data provided the important basis for the efficient utilization of plantation wood fiber and building lumber.

关键词

针叶树材单根管胞管胞形态拉伸力学性能

Keywords

softwoodsingle tracheidtracheid morphologystretchmechanical properties

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