臺灣東部老樹評比暨活力調查研究

Old Trees' Grading and Vigor Investigation in Eastern Taiwan

呂坤旺(Kuen-Wang Lu) ； 周中華(Chung-Hwa Chou) ； 鍾宜君(Yi-Jiun Jong) ； 王兆桓(Chao-Huan Wang)

《宜蘭技術學報》 9期生物資源專輯 (2002/12) Pp. 211-221

https://doi.org/10.6179/nit.job.2002.09.32

摘要

本研究以台灣東部常見的五種樹種為對象，進行林木活力調查，以瞭解林木健康的情形。在民國84年登記有案的124株老樹中，本次調查共尋獲118株。仿照美國加州大樹評分方式，評選出冠軍老樹。並使用鑑別分析法，利用所觀察到的外觀形態來建構老樹活力的鑑別函數。結果顯示，老樹在6年間的死亡率約為18%，有偏高的現象；同時依鑑別分析結果，有6株老樹被列為臨危老樹，需要進行積極的保護措施。而在本區域裡常見的老樹保護方法有：以鐵柱支撐其粗大枝條或氣根、於老樹樹體上裝設避雷針、以及清除老樹樹體的附生物。

關鍵字

老樹 ； 林木活力 ； 林木健康 ； 鑑別分析

並列摘要

This study investigated the old trees' vigor of five common species in the east of Taiwan in order to understand the condition of their health. From a total number of 124 registered trees in 1995, this survey had found 118 old trees. To follow the California register of big trees as a model, the champion tree among the old trees was chosen. Besides, using the old trees' exterior morphology, this study constructed discriminate functions for their vigor. The result of this survey showed that the recent 6-year mortality rate was about 18%, which presented a very high mortality rate. The result of the discriminate analysis had also classified 6 trees into the endangered group, and they should be protected with much effort. The common methods used to protect the old trees in this region were using stick to support tree's big branches, putting up a lightning rod on the tree's top and cleaning epiphyte on the tree's body.

並列關鍵字

Old tree ； Tree vigor ； Tree health ； Discriminate analysis