台灣常見觀賞樹木環根形成之研究

Tunghai University Institutional Repository > 創意設計暨藝術學院 > 景觀學系所 > 國科會研究報告 > Item 310901/10409

Please use this identifier to cite or link to this item: http://140.128.103.80:8080/handle/310901/10409

Title:	台灣常見觀賞樹木環根形成之研究
Other Titles:	The Research on the Formation of Girdling Roots of Landscaping Trees in Taiwan
Authors:	章錦瑜 Chang, Chin-Yu
Contributors:	行政院國家科學委員會東海大學景觀學系
Date:	2009
Issue Date:	2011-07-25T03:10:04Z (UTC)
Abstract:	環根（Girdling roots）係指根系圍繞著莖幹呈環狀生長，隨時間莖幹與根系都逐漸變粗而漸接近，至密貼時可能彼此壓制，而導致樹木生長漸漸衰退甚至死亡。另一方面密貼部位的莖幹因被環根勒住，致無法增粗而細縮，樹木於強風下可能於此細縮處彎折，對周遭環境之人、車與建築物造成威脅。本研究以台中市常見行道樹刺桐為研究對象，探討環根形成狀況以及影響因素。研究結果除做為未來為減緩環根形成之行道樹植栽設計與栽種之參考外，並提供行道樹維護管理單位針對目前已形成環根之行道樹能提早處理環根，免影響樹木生長以及造成人車危害。研究方法乃針對台中市常見行道樹刺桐之環根進行全面實地調查，研究結果發現刺桐形成環根比率為64.2%，胸徑與形成環根比率具高度正向關係，顯示隨樹齡遞增、胸徑越大，形成環根比率也隨之提高。至於同胸徑於不同植穴面積與環根形成比率、以及同植穴面積於不同胸徑與環根形成比率之相關性，僅部份具顯著相關，可能原因之一是調查樣本數不足。 Girdling roots refers to the ones growing around the tree trunk, with time, both the roots and the trunk would grow thicker, to the point when they pressure each other, causing the tree to grow weak and even wither. On the other hand, the area that is restrained by the girdling root, cannot grow thicker and ends up shrinking, under strong wind the tree may bend at the point of shrinkage, causing threat of potential damage towards the surrounding people, cars and buildings. This study focuses on corel tree (Erythrina indica). and the forming condition of girdling roots and its influence variables. The results of the study could be used for reference in planting designs and methods to reduce girdling roots, and an early solution for the maintenance personnel of the street trees that have already developed girdling roots to handle such condition, in order not to affect the growth of trees and cause potential threat. Methods used was to do a field observation on corel tree in Taichung City, to due to the more common condition of girdling roots for an actual examination. The study shows that the ratio of girdling root forming on corel tree was 64.2%. There is a high positive relation between the formation of girdling roots and the tree types trunk diameter, which indicates the older the tree, the larger the trunk diameter, and thus the higher the rate of girdling roots forming. As for the relation between different plug areas of same trunk diameter´s girdling root ratio, as well as that of between same plugging area, different trunk diameter and girdling root ration, only shows small portions of significant relation; one plausible reason could be the insufficient sample numbers.
Relation:	研究編號：NSC98-2313-B029-002-MY3 研究期間：2009-08~ 2010-07
Appears in Collections:	[景觀學系所] 國科會研究報告

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