人工林红锥树皮率及树皮纤维尺寸的研究

Study on tree bark rate and bark fiber morphological size of Castanopsis hystrix plantation

对人工林红锥的树皮率、树皮纤维尺寸及株内纵向变异特性进行研究。结果表明:红锥体积树皮率和重量树皮率总体上均随树高的增加而增大,体积树皮率变异范围为:8.6%～18.5%,平均值为11.6%,重量树皮率变异范围为7.4%～18.6%,平均值为11.1%;树高1.3 m处树皮纤维长度、直径、腔径、双壁厚、长径比、壁腔比平均值分别为1191.67μm、25.65μm、2.54μm、23.11μm、46.23和10.86;树皮纤维长度随树高的增加略有减小,纤维直径、腔径、双壁厚、长径比和壁腔比的株内纵向变异规律性不强。方差分析结果显示:不同高度的红锥体积树皮率和重量树皮率变异极显著,树皮纤维尺寸各项指标的纵向变异也均极显著。

The tree bark rate, bark fiber morphological size and the longitudinal variation within tree of the Castanopsis hystrix plantation were investigated. The results indicate that on the whole, the bark volume rate and the weight rate decreased as the tree height increased; the variation scope of bark volume rate was 8.6%～18.5%, and its average value was 11.6%; the variation scope of bark weight rate was 7.4%～18.6% with a average value 11.1%; the average values of bark fiber length, diameter, lumen diameter, thickness of cell wall, the ratio of fiber length to width and the ratio of fiber thickness to lumen diameter at 1.3 m height of tree were 1 191.67 μm, 25.65 μm, 2.54 pro, 23.11 μm, 46.23 and 10.86, respectively; the bark fiber length slightly decreased with the increase of the tree height; the longitudinal variation regulation among the tree of fiber diameter, lumen diameter, thickness of cell walt, the ratio of fiber length to width, the ratio of fiber thickness to lumen diameter wasn＇t significant; the variance analysis showed that the differences was very significant in the bark volume rate and weight rate of Castanopsis hystrix with various tree height. The longitudinal variation within tree of the bark fiber morphological sizes was very significant as well.