檳榔幹材之理學性質

Physical Property of Betel Palm Trunk

陳合進(Ho-Chin Chen) ； 陳載永(Tsai-Yung Chen) ； 黃偉銘(Wei-Ming Huang) ； 徐俊雄(Chun-Hsiung Hsu) ； 林群涵(Chun-Han Lin)

《中華林學季刊》 37卷2期 (2004/06) Pp. 213-221

https://doi.org/10.30064/QJCF.200406.0009

摘要

檳榔樹體中央部含水率較高，而邊緣部含水率較低。位於較基部且較靠近邊緣部，其含水率最低，而離地面較高之部位，其含水率之剖面變化逐漸趨緩。檳榔之強度性質均較同比重之台灣五葉松及烏心石之強度性質為低。
以多元迴歸模型分析得知，影響檳榔幹材之應力波傳遞速度變化之主要因子為密度及含水率。檳榔幹材由生材狀態乾燥至纖維飽和點時，波速呈緩慢加快，而含水率在纖維飽和點以下時，波速呈現急速之上升。

關鍵字

檳榔 ； 多元迴歸模型 ； 應力波 ； 密度 ； 含水率

並列摘要

Betel palm trunk near the central region had a higher moisture content than near the peripheral region. The moisture content near the bottom and peripheral region of the trunk were the lowest. The upper of the trunk showed a smoother change in the moisture content. The strength of peripheral region of betel palm trunk was lower than that of the woods of Pinus morrisonicola、Michelia compressa, which have the same values of specific gravity.
The multiple regression analysis showed that the factors affecting the velocity of stress wave in betel nut trunk were density and moisture content. During the period from green to fiber saturation point (F.S.P.), the velocity of stress wave increased slowly, but it increased sharply when the moisture content decreased below F.S.P..

並列關鍵字

Betel palm ； multiple regression method ； stress wave ； density ； moisture content