紫杉木材解剖构造及其材性分析

运用对比分析的方法对紫杉（ＴａｘｕｓｃｕｓｐｉｄａｔａＳｉｅｂ．）木材的解剖特征、管胞的大小、长宽比等进行了较详细地测定与分析；对紫杉木材的气干密度、干缩系数、化学成分进行了测定。结果表明：紫杉木材射线管胞内壁锯齿状加厚明显，交叉场纹孔多为窗格状，偶见松型，管胞的长宽比平均值约为５０，气干密度平均值约为５９８ｋｇ／ｍ３，差异干缩约为１８；１％ＮａｏＨ抽出物较落叶松高，其它化学指标比落叶松低。

ANALYSIS ON THE WOOD ANATOMICAL STRUCTURE AND PROPERTIES OF JAPANESE YEW

s The wood anatomical feature as well as the size of tracheid and the ratio of length to width were measured and studied by the method of comparative analysis. It was also measured for the air dry density, coeffecient of shrinkage、chemical composition of Japanese Yew. As a result, on the inner wall of the ray tracheid has sawtooth thickening obviously. The pit of cross field is windows and pine shape. The ratio of the tracheid length to width is about 50. Average air dry density is about 598kg/m 3. The shrinkage of difference is about 1 8; 1%NaOH extraction is higher than larch, and the other chemical index is lower than larch.