在参阅有关资料的基础上,从城市生态环境建设和城市植物景观营造方面分析了行道树的宏观作用,以杨凌示范区为例,时杨凌市的38条道路行道树现状进行实地调查,从行道树的种类、配置模式、季相变化等方面进行比较分析,结果发现行道树树种较为丰富,有27种,从属于22科,但配置模式较为单一.针对存在的问题提出了建议,强调应利用乡土树种营造地域特色路景；增加常绿树种,丰富季相景观；间植速生与慢生树种,避免景观空白；合理搭配上中下3层植物种类,营造复层植物景观.特别推荐了几种优良的行道树树种,以期为道路绿化建设提供科学依据.%Based on relevant materials, the paper had analyzed the macro-function of roadside trees from the perspectives of urban eco-environment construction and urban plants landscape construction. By taking Yangling City as the demonstration area, the field stud; had been conducted on trees along 38 roads, which had been analyzed from the aspects of the species of roadside trees, disposition modes and seasonable change. It had found that roadside trees were abundant, including 27 species belonging to 22 families, but the disposition mode was simple. In view of existing problems, suggestions had been proposed. It should make use of native tree species to construe regional characteristic roads; enhance evergreen tree species and enrich seasonable scenery; cultivate fast-growing and slowly-growing tree species alternately and avoid landscape blank; dispose upper, middle and lower layer of plants species reasonably and construct multiple layers of plants landscape.Several good roadside tree species had been recommended, so as to provide scientific reference for roadside green construction.
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