Radial Variation and Prediction of the Bending Properties of Larch Wood from Two Families

GAO Xin; BAO Yongze; LI Zhu; XIANG Elin; ZHOU Fan; ZHOU Yongdong

doi:10.12326/j.2096-9694.2025102

EVALUATION OF WOOD PROPERTIES OF DIRECTIONALLY CULTIVATED PINE TREES | Views : 0 下载量: CSCD: 0 CNKI被引量: 0 Crossref: 0 Wos: 0 Scopus: 0 更多指标

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Radial Variation and Prediction of the Bending Properties of Larch Wood from Two Families
1.Research Institute of Wood Industry，Chinese Academy of Forsetry，Beijing 100091，China
2.Hebei Agricultural University，Baoding 071000，Hebei，China
Vol. 39, Issue 6, Pages: 18-25(2025)
DOI： 10.12326/j.2096-9694.2025102
稿件说明：

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高鑫,鲍咏泽,李珠等.2个家系落叶松木材抗弯性能径向变化特征与预测[J].木材科学与技术,2025,39(06):18-25. DOI： 10.12326/j.2096-9694.2025102.

GAO Xin,BAO Yongze,LI Zhu,et al.Radial Variation and Prediction of the Bending Properties of Larch Wood from Two Families[J].Chinese Journal of Wood Science and Technology,2025,39(06):18-25. DOI： 10.12326/j.2096-9694.2025102.

摘要

以日5×兴9（

Larix kaempferi

5×

L. gmelinii

9）和日5×长77-3（

Larix kaempferi

5×

L. olgensis

77-3）两个家系人工林杂种落叶松为研究对象，系统分析4个树龄、径向不同生长轮区域的木材抗弯强度与抗弯弹性模量变化规律，建立抗弯性能预测模型。结果表明，两种落叶松木材的抗弯强度（modulus of rupture，MOR）和抗弯弹性模量（modulus of elasticity，MOE）沿径向呈三段式变化趋势，在1~10年阶段随生长轮位置外移而增大，之后趋于平稳，近边材区则出现下降。抗弯性能与晚材面积比、气干密度显著相关；基于生长轮位置、晚材面积比与气干密度构建拟合模型，考虑因子主效应与交互作用，模型能够准确反映抗弯性能的径向变化与波动特征，拟合结果决定系数（

²）高于0.92。验证

结果表明，MOR和MOE的预测值与实测值变化趋势一致，预测偏差均值介于6.20%~9.11%，为落叶松木材抗弯性能预测提供较为可靠的依据。

Abstract

This study investigated the radial variation of the modulus of rupture (MOR) and modulus of elasticity (MOE) of larch wood from two families (

Larix kaempferi

5×

L. gmelinii

9 and

Larix kaempferi

5×

L. olgensis

77-3) across four tree ages. A model for predicting the bending mechanical properties was established. The results indicated that both MOR and MOE of the two hybrid larch wood exhibited a three-stage radial pattern: they increased from the pith outward during the period from 1 to 10 years

then followed by a stable phase

and finally decreased near the sapwood region. The bending properties showed significant correlations with the area ratio of latewood and air-dry density. A mathematical model based on growth ring position

area ratio of latewood

and air-dry density was developed

which considered both the main effects and interaction effects of these factors. This model could accurately reflect the radial and fluctuation characteristics of the bending strength properties

with coefficients of determination (

) exceeding 0.92. The results also demonstrated that the predicted values were consistent with the measured values in terms of variation trends. The mean prediction deviation for MOR and MOE ranged from 6.20% to 9.11%. The developed model could provide a reliable method for selecting the wood property and predicting the mechanical performance of the larch wood examined.

关键词

Keywords

references

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