编号 lyqk011790

中文标题 广州市主要行道树根系对道路破坏状况调查

作者 黄英梅  崔诚  吴家龙  梁春梅  许昌超  张俊涛 

作者单位 广州市林业和园林科学研究院/广州市生态园林科技协同创新中心 广州 510405

期刊名称 中国城市林业 

年份 2024 

卷号 22

期号 6

栏目名称 研究论文 

中文摘要 城市建设更新过程中行道树与建筑物,尤其是根系与道路结构之间的冲突日益凸显,严重影响了行道树健康、城市道路结构、行人(车)的安全。基于广州市主要行道树(高山榕、大叶榕、细叶榕、杧果)根系破坏道路情况的实地调研,探究广州不同种植方式(绿带种植、广场种植和树穴种植)的常见行道树种根系对道路破坏的影响,以及行道树的胸径、冠幅与根系生长之间的关系,为城市科学绿化和城市行道树的精细化管养提供参考。结果表明:1)不同种植方式下的行道树根系对道路破坏程度表现为树穴种植＞绿带种植＞广场种植。2)行道树根系集中分布在>41 cm土层,根系密度表现为绿带种植＞广场种植＞树穴种植;距离主干1.0和1.5 m处,绿带种植的行道树根系密度显著高于广场种植和树穴种植。3)在树穴种植方式下,不同行道树的根系发达程度存在显著差异,表现为高山榕＞大叶榕＞细叶榕＞杧果;在>41 cm土层,高山榕的根系密度显著高于大叶榕、细叶榕和杧果;距离树干不同水平距离下,高山榕的根系密度均显著高于大叶榕、细叶榕和杧果(P＜0.05)。4)行道树的根系发达程度与其冠幅、胸径存在正相关关系,树木的胸径与其根系在地表水平延伸长度、根系在地表凸起的高度以及根系在地表凸起的数量存在极显著的正相关关系(P ＜ 0.01)。综上可知,树穴种植下的行道树根系对道路破坏最为严重,且树穴种植下高山榕的根系密度最高。因此,建议优先选择胸径较小、根系以竖向生长为主的树种;尽量避免在空间狭小的区域种植根系粗壮的树种;采用绿带种植方式代替树穴种植。

关键词 行道树  种植方式  根系密度  道路破坏 

基金项目 广州市林业和园林局预算项目(2061900000139)，广州市科技计划项目广州市生态园林科技协同创新中心(202206010058)

英文标题 Investigation on Road Damage Caused by Street Tree Root System in Guangzhou

作者英文名 Huang Yingmei, Cui Cheng, Wu Jialong, Liang Chunmei, Xu Changchao, Zhang Juntao

单位英文名 Guangzhou Institute of Forestry and Landscape Architecture/Guangzhou Science-Tech Collaborative Innovation Center on Ecology and Landscape, Guangzhou 510405, China

英文摘要 The conflicts between street trees and buildings, especially between root systems and road structures, have become increasingly prominent during urban construction and renewal, seriously affecting the health of street trees, the structures of urban road, and the safety of pedestrians (vehicles). Based on a field investigation of the road damage caused by the roots of the main street trees species (Ficus altissima, F. virens var. sublanceolata, F. macrocarpa, and Mangifera indica) in Guangzhou, this study explores the influence of root systems of common street tree species on road damage under different planting modes (greenbelt planting, plaza planting, and tree pit planting), and the relationship among diameter at breast height (DBH), crown width, and root growth of street trees, with an aim to provide references for the science-based urban greening and the fine management of street trees. The results show: 1) The damage degree of the root systems of street trees under different planting modes ranks as tree pit planting > greenbelt planting > plaza planting; 2) The root systems of street trees are mainly concentrated in the soil layer of > 41 cm, and their root density ranks as greenbelt planting > plaza planting > tree pit planting. At 1.0 and 1.5 m away from the trunk, the root density of street trees planted in greenbelt is significantly higher than that of street trees planted in plaza and tree pit; 3) Under the tree pit planting mode, different species of street trees show significant differences in the development of root systems, which rank as F. altissima > F. virens var. sublanceolata > F. microcarpa > M. indica. In the soil layer of > 41 cm, the root density of F. altissima is significantly higher than those of F. virens var. sublanceolata, F. microcarpa, and M. indica. At various distances from the trunk, the root density of F. altissima is significantly higher than those of F. virens var. sublanceolata, F. microcarpa, and M. indica (P＜0.05); and 4) There is a positive correlation between the root system development of street trees and their crown width and DBH. There is an extremely significant positive correlation between the DBH of trees and the horizontal extension length of their roots on the ground surface, the height of the root systems protruding on the ground surface, and the number of root systems protruding on the ground surface (P＜0.01). In summary, the root system of street trees planted in tree pits causes the most severe damage to roads, and F. altissima has the highest root density under the mode. Hence, it is proposed to give priority to tree species with smaller DBH and vertical root growth, try to avoid planting tree species with thick root systems in areas with limited space, and adopt greenbelt planting instead of tree pit planting.

英文关键词 street tree;planting method;root density;road damage

起始页码 155

截止页码 163

投稿时间 2024/6/26

作者简介 黄英梅(1994-),女,博士,研究方向为园林绿化、绿地土壤修复与改良。Email:huangyingmei3691@gmail.com

通讯作者介绍 张俊涛(1981-),男,硕士,正高级工程师,研究方向为园林绿化。E-mail:350965652@qq.com

E-mail 350965652@qq.com

DOI 10.12169/zgcsly.2024.06.26.0001

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