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作 者 ：鲍甫成 江泽慧 刘盛全

期 刊 ：林业科学 1998年 34卷 6期 页码：83-92

关键词：人工林杨树；木材性质；单板；胶合板；材性与单板和胶合板质量的关系；

Keywords:Plantation of Poplar, Wood properties, Veneer, Plywood, Relationships between wood properties and quality of veneer and plywood,

摘 要 ：本文以生长在3种长江滩地类型(江滩、洲滩、湖滩)、3种栽植密度(3m×4m,4m×5m,5m×6m)下的3个品系人工林杨树木材[欧美杨无性系72杨(Populus×euramericana cv.I-72/58),美洲黑杨无性系63杨(P.deltoides cv.I-63/51)和69杨(P.deltoides cv.I-69/55)]为对象,深入地分析了人工林杨树木材材性与单板和胶合板质量之间的关系。结果表明,72、63、69杨木材旋切和制胶合板均能获得较低的单板厚度偏差和背面裂隙率及较高的胶合强度。72、63、69杨单板厚度偏差与解剖性质中的纤维宽度、导管比量、木纤维比量在001水平下相关极显著,与纤维长度、胞壁厚度、壁腔比、腔径比、导管长和木射线比量在005水平下相关显著;单板背面裂隙率仅与胞腔直径在005水平下相关显著,与其它解剖性质相关不显著;胶合板的胶合强度与解剖性质相关最密切,其中与纤维长度、纤维宽度、胞腔直径、胞壁厚度、壁腔比、导管长、导管弦向直径、微纤丝角、导管比量、木射线比量在001水平下相关极显著。与木纤维比量在005水平下相关显著。72、63、96杨木材单板厚度偏差和单板背面裂隙率与木材化学性质(pH,酸、碱缓冲容量)之间的关系不密切;胶合板的胶合强度与边材pH值在005水平下相关显著,与心材pH值以及心、边材的pH均值达到001水平相关极显著,与木材的碱缓冲容量在005水平下相关显著。72、63、69杨木材单板厚度偏差和胶合强度与木材物理、力学性质关系不密切;单板背面裂隙率与木材抗弯弹性模量在001水平下相关极显著,与气干密度在005水平下相关显著。

Abstract:Three kinds of poplar clone wood, poplar 72(Populous×euramericana cv.I72/58), poplar 63, (P.deltoides cv.I63/51) and poplar 69 (P.deltoides cv.I69/55), growing in three different beaches of the Yangtse River (river beach, islet beach and lake beach) with three different planting densities (3m×4m,4×5m and 5m×6m) were selected as the testing materials. The relationships between wood properties and quality of veneer and plywood were studied. The results show that in wood anatomical properties of poplar 72, poplar 63 and poplar 69, the variance of veneer thickness is very significantly related to the fiber width, the proportion of vessel and fiber at 0.01 level is significantly related to the fiber length, the thickness of cell wall, the ratio of cell wall to cell cavity, the ratio of cell cavity to cell diameter, the length of vessel and the proportion of ray at 0.05 level. The ratio of lathe check of veneer is very significantly related only to the diameter of cell cavity at 0.01 level, but not related to other anatomical properties. The gluing strength of plywood is very significantly related to the fiber length, the fiber width, the diameter of cell cavity, the thickness of cell wall, the radio of cell wall to cell cavity, the vessel length, the diameter of vessel in tangential, the microfibril angle and the proportion of vessel and ray at 0.01 level, and is significantly related to the proportion of fiber at 0.05 level. In wood chemical properties (pH value, acid and alkali buffer) of poplar 72, poplar 63 and poplar 69, the variance of veneer thickness and the ratio of lathe check of veneer are not related to chemical prperties, but the pH value of sapwood is significantly related to and the pH value of heartwood and the average pH value of sapwood and heartwood are very significantly related to gluing strength of plywood at 0.01 level, respectively. In wood physicmechanical properties of poplar 72, poplar 63 and poplar 69, the variance of veneer thickness and gluing strength of plywood are not related to physicmechanical properties, but the ratio of lathe check of veneer is very significantly related to the modules of elasticity at 0.01 level and is significantly related to the wood density in airdry at 0.05 level.

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