Transverse shrinkage variations within tree stems of Melia azedarach planted in northern Vietnam

Doan Van Duong, Junji Matsumura

研究成果: ジャーナルへの寄稿記事

抄録

This study quantified variations within tree stems in tangential shrinkage (αT), radial shrinkage (αR), and tangential/radial shrinkage ratio (αTR) of Melia azedarach grown in two different sites in northern Vietnam. The overall values of αT, αR, and αTR were 7.05%, 4.38%, and 1.64, respectively. The variation pattern in αT and αR was found to increase gradually from pith to bark and this trend was similar on both sites. In radial direction, the αTR decreased significantly from 10 to 50% of the radial length from pith before approaching a constant value toward the outside. The transverse shrinkage variation with height was very small and without statistical significance. There were strong positive relationships between transverse shrinkage and basic density (BD). This implies that the selection for high wood density may lead to increase wood transverse shrinkage. In addition, the αT and αR had significant positive linear relationships with both acoustic wave velocity (VL) and dynamic modulus of elasticity of log (DMOElog). This result suggests that it might be possible to sort lumber with large transverse shrinkage by stress wave method for M. azedarach planted in northern Vietnam.

元の言語英語
ページ(範囲)720-729
ページ数10
ジャーナルJournal of Wood Science
64
発行部数6
DOI
出版物ステータス出版済み - 12 1 2018

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Wood
Lumber
Acoustic wave velocity
Elastic moduli
Direction compound

All Science Journal Classification (ASJC) codes

  • Biomaterials

これを引用

Transverse shrinkage variations within tree stems of Melia azedarach planted in northern Vietnam. / Van Duong, Doan; Matsumura, Junji.

:: Journal of Wood Science, 巻 64, 番号 6, 01.12.2018, p. 720-729.

研究成果: ジャーナルへの寄稿記事

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title = "Transverse shrinkage variations within tree stems of Melia azedarach planted in northern Vietnam",
abstract = "This study quantified variations within tree stems in tangential shrinkage (αT), radial shrinkage (αR), and tangential/radial shrinkage ratio (αT/αR) of Melia azedarach grown in two different sites in northern Vietnam. The overall values of αT, αR, and αT/αR were 7.05{\%}, 4.38{\%}, and 1.64, respectively. The variation pattern in αT and αR was found to increase gradually from pith to bark and this trend was similar on both sites. In radial direction, the αT/αR decreased significantly from 10 to 50{\%} of the radial length from pith before approaching a constant value toward the outside. The transverse shrinkage variation with height was very small and without statistical significance. There were strong positive relationships between transverse shrinkage and basic density (BD). This implies that the selection for high wood density may lead to increase wood transverse shrinkage. In addition, the αT and αR had significant positive linear relationships with both acoustic wave velocity (VL) and dynamic modulus of elasticity of log (DMOElog). This result suggests that it might be possible to sort lumber with large transverse shrinkage by stress wave method for M. azedarach planted in northern Vietnam.",
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