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題 名 | 應用X-ray樹輪密度圖譜技術解析茶樹的樹輪特徵值及樹齡=Resolution of Tree Ring Characteristics and Tree Ages of Tea Trees by X-ray Densitometric Techniques |
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作 者 | 林振榮; 鍾智昕; 邱明賜; | 書刊名 | 臺灣茶業研究彙報 |
卷 期 | 33 2014.11[民103.11] |
頁 次 | 頁29-44 |
分類號 | 434.81 |
關鍵詞 | 茶樹; 臺茶12號; 樹輪寬度; 樹輪密度; 無損檢測技術; Tea tree; Camellia sinensis; TTES No.12; Ring width; Ring density; Nondestructive technique; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究應用X-ray 樹輪密度圖譜技術測定1987 年栽植於茶業改良場文山分場 (新北市石碇區) 之臺茶12 號的樹輪特徵值及樹齡,結果發現茶樹的平均樹輪寬度 1.48 mm、樹輪密度735.4 kg m-3,平均樹齡為24.5 年,茶樹的樹齡可藉由x-ray 樹輪 密度圖譜解析。茶樹經過移除樹冠的強度修剪後,當年的樹輪寬度及晚材率會降低, 並持續3 年 (連續3 個樹輪),之後,可促進樹木的生長 (樹輪寬度);而樹輪密度及 一個樹輪內的密度差異值 (最高及最低密度的差異) 在樹木經過移除樹冠的強度修 剪後,第2 年會降至最低,之後,樹輪密度及密度差異值會增加。最後1 年 (第25 個樹輪) 時,樹木生長及活力衰退,樹輪寬度、樹輪密度、晚材率、一個樹輪內的 密度差異值皆突然下降。以上茶樹的樹輪特徵值及解析樹齡技術等資料可以提供茶 樹栽培管理資訊參考。 |
英文摘要 | The purpose of this research was to explore the ring characteristics and tree ages of tea trees (Camellia sinensis, TTES No.12) by X-ray densitometric techniques. The results revealed that the average ring width, ring density, and tree ages of sampled tea trees were 1.48 mm, 735.4 kg m-3, and 24.5 yrs, respectively. The tree ages of tea trees could be examined by tree ring analysis techniques. The ring width (RW), ring density (RD), latewood percentage (LWP), and in a ring density difference value (RDW) showed different reactions lasting several years after heavy pruning of removed crown. Overall, the heavy pruning caused immediate production (first year) of lower RW and LWP, lasting for three years; however, lower RD and RDW were delayed up to two years after heavy pruning of removed crown than those of other rings. Sudden drop in the RW, RD, LWP, and RDW value of tea trees were found in the 25th tree ring due to the tree growth and vitality of decline by visual observation. Experimental results could provide some vital information and techniques for management and practice of tea tree. |
本系統中英文摘要資訊取自各篇刊載內容。