台灣主要經濟樹種材質之基礎研究（ⅩⅣ）烏心石、錐果櫟及台灣赤楊之單面與全面水分移動速度之變異性

Studies on the Fundamental Properties of the Economical Tree Species in Taiwan (XIV) The Variability of Speed of Moisture Movement in One and Three Dimensions of Formosan Michelia, Narrow Leaved Oak and Taiwan Alder

王松永(Song-Yung Wang) ； 張志仁(Jyh-Jen Chang)

《林產工業》 10卷3期 (1991/09) Pp. 1-18

https://doi.org/10.6561/FPI.1991.10(3).1

摘要

本研究係探討烏心石，錐果櫟及台灣赤楊等濶葉樹材在單株內之單面水分移動速度，全面水分移動速度在樹幹內橫向及軸向變異性，結果如次：（1）單面水分移動速度在橫向變異性可歸納為四個類，但在軸向可歸納為兩個類型。（2）全面水分移動速度在橫向變異性，在＞ FSP時可歸納為四個類型，但在＜ FSP時可歸納為五個類型，而在軸向則可歸納為三個類型。（3）單面水分移動速度有橫切面＞弦切面＞徑切面，其比值各為烏心石為7.7:1.8:1，錐果櫟為12.4:1.5:1，台灣赤楊為6.3:2.9:1。（4）三種濶葉樹之單面及全面水分移動連度均有台灣赤楊＞烏心石＞錐果櫟之趨勢。（5）三種切面之單面水分移動速度均會隨容積密度增加而呈直線狀減低。（6）全面水分移動速度＞ F SP/＜ FSP值各為烏心石159.9，錐果櫟152.2，台灣赤楊166.9。

關鍵字

烏心石 ； 錐果櫟 ； 台灣赤楊 ； 單面及全面水分移動速度 ； 橫向及軸向變異性

並列摘要

The variation in the transversal and axial direction of moisture movement in one and three dimensions of Formosan michelia, Narrow leaved oak and Taiwan alder in a single trunk were investigated. The experimental results are summarized as follows: (1) The speed of moisture movement in one dimension along the transversal direction can be classified into four types. However, there are two types variation in the axial direction. (2) The speed of moisture movement in three dimension along the transversal direction can be classified into four types for ＞ FSP case, and five types for ＜ FSP case However, there are three types variation in the axial direction. (3) The speed of moisture movement in one dimension showed the decreasing tendency as follows: cross section ＞ tangential section ＞ radial section. The speed ratio of three section are 7.7: 1.8: 1 for Formosan michelia, 12.4: 1.5: 1 for Narrow leaved oak and 6.3: 2.9: 1 for Taiwan alder. (4) The speed of moisture movement in one dimension of three wood species showed the decreasing tendency as follows: Taiwan alder ＞ Formosan michelia ＞ Narrow leaved oak. (5) The speed of moisture movement in the one dimension was negative correlated with bulk density. The higher the density, the slower the speed. The relationship was expressed by regression (3)~(5). (6) The speed of moisture movement in three dimensions above FSP was significantly different from that below the FSP. Among three species, the difference was greatest in Taiwna alder. The speed ratio of ＞ FSP/＜ FSP are 159.9 for Formosan michelia, 152.2 for Narrow leaved oak and 166.9 for Taiwan alder.

並列關鍵字

Formosan michelia ； Narrow leaved oak ； Taiwan alder ； Speed of moisture movement in one and three dimensions ； variation in transversal and axial direction