국내 메타세쿼이아 가로수의 결함 분석 및 관리 특성

초록

We investigated the defect analysis and management characteristics of Metasequoia glyptostroboides street trees in eight regions with 10 streets of Korea (Samcheok, Daejeon, Daegu, Gumi, Pohang, Busan, Jinan, and Damyang). From June to July in 2022 and 2023, a total of 280 trees were visually inspected for basic growth parameters, defect indices, and management characteristics. The tree metrics were averaged as follows: height 17.8 m, diameter at breast height (DBH) 43.2 cm, root collar diameter 62.3 cm, crown width 7.7 m, and under branch height 4.1 m, with a positive correlation observed between DBH and height. When applying height prediction models based on DBH, these street trees were up to 11.9 m shorter than M. glyptostroboides under natural conditions. The mean defect index was 2.21, with root defects (96.79%), pests (60.00%), and dead branches (46.79%) being the most prevalent issues. Protective frame widths mostly ranged from 1 to 2 meters; however, some regions had around 1 meter widths, exhibiting root damage. Except for the areas where cables and pipes were installed beneath the ground, pruning practices resulted in constrained and unnatural crown forms. These findings underscore the necessity for comprehensive management strategies to ensure the sustainable maintenance of M. glyptostroboides street trees nationwide.

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