温州 40a生降香黄檀心材率和木材性质研究
The study on heartwood percentage and wood properties of 40-years Dalbergia odorifera in Wenzhou
[目的]为分析降香黄檀在温州引种 40a后的木材特性,最终为降香黄檀在温州推广和可持续发展提供实证引导。[方法]本文以浙江省温州市瓯海区 40a生降香黄檀样株为对象,测试分析其心材率变化和木材的物理力学性质,并与其他地区降香黄檀木材特性进行横向比较。[结果]温州 40a生降香黄檀的心材率最大为根径处 45.36%,6.5m以下的平均心材率为 14.69%;心材的平均气干密度为 0.792g·cm-3,接近香枝木类心材气干密度要求,且大于边材的气干密度;主干的平均抗弯强度、顺纹抗压强度、全部横纹抗压强度(径向)和全部横纹抗压强度(弦向)分别为 101.6MPa、60.2MPa、13.9MPa和 12.7MPa,此 4项力学性质指标与木材密度正相关;主干的抗弯弹性模量为 10620MPa,受密度影响不明显。[结论]温州 40a生降香黄檀中下段心材已符合《红木》标准,其木材的物理力学性质不弱于广西南宁50a生降香黄檀木材。
Dalbergia odorifera of 40 years in Jingshan National Forest Park in Wenzhou city was tested regrading its heartwood percentage and wood properties.The result showed that the biggest heartwood percentage is 45.36%in its base of stem,and the average heartwood percentage below 6.5 meters height of stem is 14.69%.The average air-dry density of heardwood is 0.792g·cm-3,near the standard of Dalbergia spp.,and the air-dry density of heardwood is higher than its of sapwood.The flexural strength,compressive strength along the grain,side(wise)compression strength(radial)and side(wise)compression strength(plain)of stam are respectively 101.6MPa、60.2MPa、13.9MPa and 12.7MPa,the 4 mechanical properties are positively related to wood density.The flexural elastic modulus of stam is 10620MPa,no obvious regularity with wood density.The Contrast showed that the wood properties of 40-years Dalbergia Odorifera collected in Wenzhou are no less than those of Dalbergia Odorifera collected in Nanning.
李效文;唐荣强;王金旺;陈秋夏;方崇荣;
浙江省亚热带作物研究所,浙江温州,325005;浙江省林业科学研究院,浙江杭州,310023;浙江省亚热带作物研究所,浙江温州,325005;浙江省亚热带作物研究所,浙江温州,325005;浙江省林业科学研究院,浙江杭州,310023;
Dalbergia odorifera physical properties mechanical properties air-dry density heardwood sapwood
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