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作 者 ：赵有科 鲍甫成

期 刊 ：林业科学 1998年 34卷 4期 页码：88-95

关键词：针叶材毛细结构；纵向渗透性；流体力学原理；

Keywords:Capillary structure of softwood, Longitudinal(axial) permeability, Principle of flow,

摘 要 ：本文首次提出搭接面及侧面胞壁上纹孔在流体纵向渗透时的不同作用,并运用流体力学的原理,对针叶树木材流体纵向渗透性与其构造的关系进行了系统分析。结果表明:针叶树木材流体渗透系数等于早、晚材对其贡献之和,早、晚材对其的贡献,分别等于单位面积上流体流动路径数、管胞平均长度与纹孔膜膜缘厚度比值及纹孔膜微孔的比渗透性三者之积。经验证,研究结果与实测值较好的相符。

Abstract:The relationship between softwood longitudinal permeability and its structure was systematically studied based upon the principles of flow. The results showed that the specific permeability coefficient (K) was proportional to the number of flow paths every unit area, the ratio of average tracheid length to the equivalent thickness of the pit membrane and the specific permeability coefficient of pit openings. The results had been tested and were in a good agreement with the data presented by Jiang(1993).

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