木材科学与技术2025，Vol.39Issue(6)：18-25,8.DOI:10.12326/j.2096-9694.2025102
2个家系落叶松木材抗弯性能径向变化特征与预测
Radial Variation and Prediction of the Bending Properties of Larch Wood from Two Families
摘要
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(R2)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
落叶松/家系/抗弯性能/径向变化/预测Key words
larch/families/bending strength/radial variation/prediction分类
农业科技引用本文复制引用
高鑫,鲍咏泽,李珠,向娥琳,周凡,周永东..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(6):18-25,8.基金项目
农业生物育种国家科技重大专项课题"纸浆材与结构用松树木材性质与质量评价"(2023ZD0405905). （2023ZD0405905）
