2种条纹乌木木材的构造特征

对菲律宾乌木和苏拉威西乌木木材的宏、微观构造和细胞形态进行观察，并测定分析，得出其构造特征。菲律宾乌木和苏拉威西乌木都属散孔材，生长轮不明显，心材为黑白相间条纹；管孔径列，主单复管孔和管孔链，少见管孔团，含树胶，以圆柱形导管为主，导管纹孔为筛状互列纹孔；轴向薄壁组织排列为离管带状，部分含树胶和晶体；木射线为异型单列，多含树胶和晶体。比较菲律宾乌木和苏拉威西乌木的木材构造：前者结构甚细，后者为细；前者木纤维细胞宽度和壁厚较后者大，且前者形态种类多；轴向薄壁细胞前者较后者短粗，前者形态种类多且细胞壁有更多凸凹；木射线密度前者为密，后者为甚密，木射线的直立细胞后者较前者高窄。

Structural characteristics of two species of striped ebony wood

The macrostructure, microstructure and all kinds of cell morphology of wood of Diospyros philippensis Gurke and Diospyros celehica Bakh were observed, mensurated and analyzed and their structural characteristics parameters were obtained. Their similarities were as follows. Both of them belong to diffuse porous wood. Their annual rings were not obvious. Heartwood was with black and white stripes. Pores were of radial arrangement, mainly solitary pore and multiple pore, rarely pore cluster, including gum. Vessel shapes were mainly cylindrical. Pore pits were ethmoid alternate pitting. Longitudinal parenchymas were linear and independent of the pores, and the part contained gum and crystal. The type of wood ray was single row of heterogeneous heterocellular ray. Many of broad ray parenchymas included gum and crystal. Meanwhile the differences of wood structural characteristics between the two species of striped ebony wood were as follows. The former texture was very fine, the latter was fine. The thickness and width of wooden fiber cell wall of the former was bigger than those of the latter, and the shapes of wooden fibers of the former were more various than those of the latter. Longitudinal parenchyma cells of the former were short and wide than those of the latter and the shapes of the former were more various and rough than those of the latter. The density of wood ray of the former was closer than that of the latter. Erect wood ray cells of the former were higher and more narrow than those of the latter.