應用鑽孔抵抗技術評估台灣杉造林木之早晚材境界密度

Application of the Drill Resistance Method for Density Boundary Evaluation of Early Wood and Late Wood of Taiwania (Taiwania cryptomerioides Hay.) Plantation

王松永(Song-Yung Wang) ； 林振榮(Cheng-Jung Lin)

《台灣林業科學》 16卷3期 (2001/09) Pp. 197-200

https://doi.org/10.7075/TJFS.200109.0197

摘要

本報告應用鑽孔抵抗技術(drill resistance technique)測定台灣杉造林木的密度量變曲線(density profile)，其鑽孔抵抗值與密度存在線性關係，而在同一年輪內之早晚材境界密度(density boundary of early wood and late wood)與平均最大密度及最小密度值，兩者具有顯著性正相關存在。依據早晚材境界密度值，應該可以建立重要年輪特徵值(ring characteristics)作爲評估材質，此技術發現適用於台灣杉造林木密度量變曲線的測定。

關鍵字

台灣杉 ； 阻抗圖譜儀 ； 鑽孔抵抗技術 ； 密度量變曲線 ； 年輪特徵值 ； 早晚材境界密度

並列摘要

The purpose of this study was to investigate the density profiles of Taiwania plantation wood by a drill resistance technique. The drill resistance technique as applied to Taiwania plantation wood uses a liner relationship between the solid density and the drill resistance values. There is a positive significant relationship between the average Dmax+Dmin density (maximum and minimum densities) and the density boundary of early and late wood in a ring.
According to the density boundary of early and late wood, the tree-ring characteristics should be established for estimating some physical properties of the wood. The drill resistance technique was found to be a good measure of the density profile of Taiwania plantation wood.

並列關鍵字

Taiwania (Taiwania cryptomerioides Hay.) ； RESISTOGRAPH ； drill resistance technique ； density profiles ； ring characteristics ； density boundary of early wood and late wood