景觀樹木外科手術的工法和成效

The Method and Effect of Landscape Tree Surgery

樹木對居住在城市的人類生活影響巨大，不僅能美化環境、過濾空氣和水、更能激發正向情緒，展現各城市於文化、歷史、地理、生態等特色。因此城市中樹木的健康和風險問題更應被關注，以避免樹木感染災害及無預警倒伏或枝條斷落等公共安全問題。
本研究目的主要是進行藉由「景觀樹木VTA健康檢查診斷評估表」探討經由「改良式樹木外科手術」的腐朽處理，包括傷口腐朽清創去除、高溫碳化保護及塗佈傷口保護藥劑處理的9個案例的分析，探討其是否能有效的抑止腐朽菌和促進樹木生長勢的恢復。
研究結果顯示，使用｢景觀樹木VTA健康檢查診斷評估表」，評估改良式樹木外科手術前和後的樹木的生長狀況，是可行但有其限制，術後若達五年以上的生長恢復期，則VTA評估表的分數和樹木健康程度才會有呈現出顯著關係。若恢復期不及五年，則需再配合觀察腐朽傷口癒傷組織的形成、傷口面積的減少、無流出組織液等來判定「改良式樹木外科手術｣對樹木生長幫助。
樹木外科手術的成效，在國內外的各方專家學者有許多不同的看法，這些歧異或許是因為植物種類不同、環境風土差異、動植物生態差異、各家所使用處理方法不同。後續研究可以針對這些歧異度如何影響外科手術的成效來進行探討。

Trees have a huge impact on human being living in cities. They can not only beautify the environment, filter air and water, but also stimulate positive emotions and represent the cultural, historical, geographical, ecological, and other characteristics of each city. Therefore, more attentions should be paid to the health and risk issues of trees in cities to avoid tree infection disasters and public safety issues such as unexpected tree falling without warning or branch breakage.
The purpose of this study is mainly to explore the decay treatment through ''modified tree surgery'' through the ''Landscape Tree VTA (Visual Tree Assessment) Form'', including wound decay debridement and removal, high-temperature carbonization protection, and wound protection agent application. An analysis of 9 cases was conducted to explore whether it can effectively inhibit decay bacteria and promote the recovery of tree growth.
The research results show that using the '' Landscape Tree VTA Form '' to evaluate the growth status of trees before and after modified tree surgery is feasible but has its limitations. If there is a growth recovery period of more than five years after surgery, then there will be a significant relationship between the score of the VTA and the health of the tree. If the recovery period is less than five years, it is necessary to observe the formation of callus tissue from the decayed wound, the reduction of the wound area, and the absence of tissue fluid leakage to determine whether the ''modified tree surgery'' will help the tree growth.
Experts and scholars worldwide have many different opinions on the effectiveness of tree surgery. These differences may be due to different plant species, different environmental conditions, different animal and plant ecology, and different treatment methods used by each company. Follow-up research could explore how these differences affect surgical outcomes.