青冈栎天然林木材的解剖特征及基本材性研究

Wood Anatomical Characteristics and Basic Properties of Cyclobalanopsis glauca Natural Forest

以广西桂林市阳朔县和湖南永州市江华瑶族自治县、道县3个种源的青冈栎天然林群落为样本,分析青冈栎木材的解剖构造特征、基本密度和纤维形态,探讨木材材性的径向变异规律和种源差异性。结果表明:3个种源青冈栎木材的平均基本密度为0.754~0.763 g/cm3,纤维长度为1 113.9~1 180.8μm,纤维宽度为17.4~18.2μm,壁厚为7.0~7.4μm,壁腔比为4.4~4.9,长宽比为61.7~64.8;沿髓心至树皮方向,木材基本密度和纤维长宽比无显著性变化,纤维长度、宽度、厚度和壁腔比均显著增大后趋于稳定;3个种源间的木材解剖构造无明显差别,在α=0.05检验水平下木材基本密度、纤维长度、壁腔比及长宽比均无显著性差异,阳朔与江华、道县的纤维宽度以及阳朔与江华的壁厚存在显著性差异。

This study investigated the wood anatomical characteristics,wood basic density and fiber morphologies of Cyclobalanopsis glauca natural forest in Yangshuo County of Guilin in Guangxi,as well as in Jianghua Yao Autonomous County and Dao County of Yongzhou in Hunan.The radial variation and provenance differences of wood properties were discussed.The results showed that the average wood basic density,fiber length,fiber width,wall thickness,ratio of wall thickness to lumen diameter and ratio of fiber length to width of the 3 provenances were in the ranges of 0.754-0.763 g·cm-3,1113.9-1 180.8μm,17.4-18.2μm,7.0-7.4μm,4.4-4.9 and 61.7-64.8,respectively.Along the radial direction from pith to bark,the length,width,wall thickness and ratio of wall thickness to lumen diameter of the wood fibers tended to be stable after a significant increase,while the basic density and ratio of fiber length to width showed no obvious variations.The wood from the 3 provenances showed similar anatomical characteristics.There were no significant differences in wood basic density,fiber length,ratio of wall thickness to lumen diameter and ratio of fiber length to width between the 3 provenances at theα=0.05 test level,while significant differences appeared in fiber width between Yangshuo and other provenances and in wall thickness between Yangshuo and Jianghua.