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題 名 | 微密度計法應用於評估杉木實生林與萌蘖林木材年輪構造=Evaluation of Annual Ring Structure of Seedling and Sprouting China-fir with Microdensitometer Method |
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作 者 | 陳勁豪; 林法勤; 王松永; | 書刊名 | 林產工業 |
卷 期 | 21:2 2002.06[民91.06] |
頁 次 | 頁91-96 |
分類號 | 436.185 |
關鍵詞 | 杉木; 萌蘖林; 實生林; X-ray微密度計; 秋材率; China-fir; Sprouting growth; Seedling growth; X-ray microdensitometer; Percentage of latewood; |
語 文 | 中文(Chinese) |
中文摘要 | 經X-ray微密度計檢視後發現,實生林木材的平均秋材率和萌櫱林木材的無顯著性差異,同時兩者秋材率隨著年齡的增加,而以線性關係增加。萌櫱林木材的平均密度大於實生林木材的平均密度,但無顯著的差異,而兩者的密度越往樹皮的方向有呈線性增加的趨勢。實生林木材的平均年輪寬大於萌提林木材的平均年輪寬,同時年輪寬越遠離髓心越小,而且在最初10年內年輪寬度急劇下降,10-15年後則減少和緩,15年後有慢慢趨於一定的態勢。 |
英文摘要 | By X-ray micro-densitometry test, there is no significant difference in average percentage of latewood between seedling and sprouting China-fir. The average percentage of latewood of them increase linearly with increasing age. There is no significant difference in average gravity between seedling and sprouting China-fir. The average gravity of them increase linearly towards bark. The average ring width of seedling China-fir is greater than that of sprouting China-fir. And the average ring width decreases from pith to bark. During the first ten years, ring width decreases rapidly. While the width of 10th-15th growth ring decreases smoothly, after the 15th annual ring, the width of annual ring becomes stable. |
本系統中英文摘要資訊取自各篇刊載內容。