模拟道路种植环境对银杏生长的影响

城市下垫面性质的改变，压缩了行道树生长的环 境空间，阻碍了土壤水分的移动与循环，增加了行道树生长 的难度。探究街道种植环境对行道树生长的限制因子，是完 善行道树种植设计与栽培管理技术，改善城市街道形象，提 升城市绿化水平，增强城市生态系统弹性的有效途径。利用 模拟道路立地环境试验站，通过对移植后的银杏生长势的评 估、叶性状参数的测定、生理指标的定期观测得出，行道树 生长受硬质铺装等人工覆盖面的显著影响，生长量普遍降低 了50%；渗透性铺装能有效改善行道树的生存环境；为行道 树提供充足的水分供给和有效的降水补充通道，是道路建设 和行道树栽植所需要考虑的主要因素；在移栽初期，采取提 高土壤保水力和养分水平、增大树池体积的方式对银杏行道 树的生长有较好的促进作用。

Simulating the Influence of Road Planting Environment on the Growth of Ginkgo biloba

The change of the nature of urban underlying surface has reduced the environmental space for the growth of stree trees, hindered the movement and circulation of soil moisture, and increased the difficulty of the growth of street trees. Investigating the limiting factors of street planting environment on the growth of street trees is an effective way to improve the design and cultivation management techniques of street trees, improve the image of urban streets, improve the level of urban greening, and enhance the elasticity of urban ecosystems. Using the simulated road site environmental test station, the growth potential of Ginkgo biloba after transplantation, the determination of leaf trait parameters, and the regular observation of water physiological indexes were evaluated, the results indicated that the growth of street trees was significantly affected by artificial coverage such as hard pavement, and the growth was generally reduced by 50%; the permeable pavement could effectively improve the living environment of street trees; providing sufficient water supply and effective precipitation replenishment channels for street trees is a major factor to be considered in road construction and street planting; in the early stage of transplanting, the growth of Ginkgo biloba was improved by increasing the soil water retention and soil nutrient level and increasing the volume of the planting pit.