非洲崖豆木的构造特征及挥发性气体化学成分

Wood characteristics and volatile gas chemical composition of Millettia laurentii

【目的】研究非洲崖豆木(Millettia laurentii)的宏观和微观构造特征,分析其木材挥发性气体的化学成分,为非洲崖豆木的准确识别和木材利用提供依据。【方法】以非洲崖豆木为研究对象,借助仪器对其宏观和微观特征、密度、组织比量进行观察与测量;借助气相色谱-质谱(GC-MS)技术对非洲崖豆木木材的挥发性气体化学成分进行检测分析。【结果】非洲崖豆木宏观特征表现为材色黑褐色,光泽感不强,无明显香味,早晚材区分不明显;管孔肉眼下清晰可见。微观特征为散孔材,导管横切面圆形或卵圆形,导管腔内含有少量树胶,木射线和薄壁组织内不含油细胞,射线组织为同形单列及多列,偶见单列。导管、木射线、轴向薄壁组织、木纤维组织比量分别为2.85%,18.11%,20.70%和58.34%。从非洲崖豆木挥发性气体中鉴定出27种化合物。【结论】非洲崖豆木木材构造特征明显,密度较大;木材挥发性气体对人体安全且具有良好的养生保健作用。

【Objective】This study investigated the macro and micro structures of Millettia laurentii and analyzed the chemical composition of volatile gases to provide basis for identification and utilization of Millettia laurentii wood.【Method】The macro and micro wood structures,density and tissue ratio of Millettia laurentii were observed and measured and the chemical composition of wood volatile gases was analyzed using GC-MS.【Result】The macro structure included red brown wood color with dimmed lights without obvious fragrance.No obvious distinction was observed between early and late woods and pores were visible under naked eye.At the microscope scale,the wood was diffuse-porous,the cross section was circle or oval,and the wood catheter was filled with small amount of gum.The wood ray and parenchyma was in single and multiple columns of same shape with occasional single column.The tissue ratios of pipe,wood ray,longitudinal parenchyma and fiber were 2.85%,18.11%,20.70%and 58.34%,respectively.A total of 27 substances were identified.【Conclusion】The Millettia laurentii wood has significant structural features with large density,and the volatile gases are good to human health.