Studies on structural characteristics of wood fibers for quality assessment of hardwood.

研究木纤维的结构特征以评估硬木的质量。

• 批准号: 59460187
• 负责人: MURAKAMI Koji
• 金额: $ 4.61万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1984
• 资助国家: 日本
• 起止时间: 1984 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-59460187/
• 关键词: Hardwood; Structural index; Wood fiber; Cross-sectional dimension; Fractional wall area; Fiber length; Fibril angle; 材質評価

This project aimed to develop fundamental studies on quality assessment of hardwood on the basis of anatomical and structural features of wood fibers. The wood fiber is a main element composing the grand tissue of the secondary xylem of hardwood. Therefore, properties and uses of hardwood considerably depend on the characteristics of fibers. Cross-sectional dimensions of fibers, fractional fiber wall area, fiber length and fibril angle of fiber wall were selected as anatomical and structural indices significant for quality assessment. New methods for measurement of them were examined and tried in several hardwood species. Variability of such indices were examined, and classifications based on them were discussed in the report.1) Measurement of cross-sectional cell dimensions was examined by means of the simple image analyzing systems( PIAS <I> and <II> ). The area, fractional area and Ferete's diameter of fiber cell-lumina were measured by the systems, and fiber wall thickness and diameter were calculated from measurements by the analyzers.2) Fractional wall area was calculated from the fractional cell-lumen. It is an important quality index closely related with wood density. A classification based on fractional wall area was proposed in this report.3) Estimation of fiber length in pulp was examined statistically. Fibril angles of fiber walls were measured on SEM micrographs. Variations of fibril angles and fiber length in timber were examined in several species. The measurements of them in adult wood can be used as quality indices.

本项目旨在开展基于木材纤维解剖结构特征的硬木质量评价基础研究。木材纤维是构成阔叶树次生木质部大组织的主要成分。因此，硬木的性能和用途在很大程度上取决于纤维的特性。纤维截面尺寸、纤维壁面积分数、纤维长度和纤维壁的纤丝角被选为对质量评价有意义的解剖和结构指标。在几种阔叶树种中，对新的测量方法进行了检验和试验。这些指标的变异性进行了检查，并在报告中讨论了基于它们的分类。1）横截面细胞尺寸的测量通过简单的图像分析系统（皮亚斯和）进行了检查<I><II>。测量纤维细胞腔的面积、面积分数和Ferete直径，计算纤维壁厚和直径。2）计算纤维细胞腔的面积分数。它是与木材密度密切相关的重要质量指标。本文提出了一种基于壁面积分数的纤维长度分类方法。3）对纸浆中纤维长度的估计进行了统计检验。在扫描电镜显微照片上测量了纤维壁的纤丝角。研究了几个树种木材纤维角和纤维长度的变异。成年材中这些元素的测定可作为木材质量的指标。

项目成果

藤原健,佐伯浩: 京都大学農学部演習林報告. No.59. (1987)

Ken Fujiwara、Hiroshi Saeki：京都大学农学院实验森林报告（1987 年）。

Fujiwara, T. and H. Saiki: "Intraincrement variation of cross-sectional dimensions of wood fibers in several hardwood species." Bulletin of the Kyoto University Forests. No. 59. (1987)

Fujiwara, T. 和 H. Saiki：“几种硬木树种中木纤维横截面尺寸的训练变化。”

Nagai,K;H.Saiki;H.Harada: Proc.Pacific Regional Wood Anatomy Conf.,Tsukuba. 94-96 (1984)

Nagai,K;H.Saiki;H.Harada：Proc.太平洋地区木材解剖学会议，筑波。

Nagai, K., H. Saiki and H. Harada: "The radial variations in fibril angle of fibers in several hardwood species." Proc. Pacific Regional Wood Anatomy Conf., Tsukuba. 94-96 (1984)

Nagai, K.、H. Saiki 和 H. Harada：“几种硬木树种中纤维原纤维角的径向变化。”