Abstract Urban trees often suffer from poor soil conditions, compromising their health and safety and raising management issues. In compact development areas, planting sites are beset by critical physical soil constraints, especially confined soil volume on narrow roadsides. These include internal (micro-scale) restrictions due to compaction and excessive coarse fractions such as gravels, and external (macro-scale) restrictions due to limited soil depth and width. Soil area provision (SAP) is assessed based on the moisture need of trees. A creative soil design scheme is proposed to expand soil volume, based on the principle of soil volume sharing, subsurface soil conduits, and subsurface soil corridors supplementing the routine open soil corridor. SAP could extend from the narrow footpath to the adjoining carriageway as a soil peninsula and green space as offset soil volume. The study aimed at knowledge exchange among science, policies, and practices, with implications for the sustainable management of many roadside trees in cities.

中文翻译：

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密闭种植地树木的土壤体积限制和城市土壤设计

摘要 城市树木通常土壤条件差，危害其健康和安全并引发管理问题。在紧凑的开发区，种植场地受到严格的物理土壤限制的困扰，特别是狭窄路边的土壤体积有限。这些包括由于压实和过多的粗颗粒（例如砾石）导致的内部（微观）限制，以及由于土壤深度和宽度有限而导致的外部（宏观）限制。土壤面积供应 (SAP) 是根据树木的水分需求进行评估的。以土壤容积共享、地下土壤通道、地下土壤廊道补充常规开放土壤廊道的原则，提出了一种创造性的土壤设计方案，以扩大土壤体积。SAP 可以从狭窄的人行道延伸到相邻的车道作为土壤半岛和绿色空间作为偏移土壤体积。该研究旨在促进科学、政策和实践之间的知识交流，对城市中许多路边树木的可持续管理产生影响。