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題 名 | 應用鑽孔抵抗技術評估臺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 |
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作 者 | 王松永; 林振榮; | 書刊名 | 臺灣林業科學 |
卷 期 | 16:3 2001.09[民90.09] |
頁 次 | 頁197-200 |
分類號 | 436.711 |
關鍵詞 | 臺灣杉; 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; Taiwania; Taiwania cryptomerioides Hay.; RESISTOGRAPH; Drill resistance technique; Density profiles; Ring characteristics; Density boundary of early wood and late wood; |
語 文 | 中文(Chinese) |
中文摘要 | 本報告應用孔抵抗技術(drill resistance technique)測臺灣夏造林木的密度量變曲線 (density profile),其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值 (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 為評估材質,此技術發現適用於臺灣夏造林木密度量變曲線的測定。 |
英文摘要 | 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 positives 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. |
本系統中英文摘要資訊取自各篇刊載內容。