城镇密集区行道树结构特征及发展对策研究

行道树绿化是城镇密集区绿化的骨干,反应城市的景观风貌.对行道树结构特征研究分析,可以为今后城镇密集区绿化发展提供有益的指导、建议.现以成都市为例,选取城镇密集区内20条特色街道,参考多度、频度、重要值、常绿落叶树种比及乡土外来树种比等指标,对行道树种类、数量、生长情况进行分析研究.结果表明:成都市城区内行道树树种单一,常绿树过多,乡土树种开发利用不够等,需要进一步优化行道树树种格局,增加生物多样性,丰富城市景观.

Study on Structure Characteristic and Development Countermeasures of Street Trees of Town Concentrated Area

The street trees are the backbone of town concentrated area’s landscaping,it stand for the city landscape style.good advices for landscaping in town concentrated area in the future from study and deduce about the structural feature of the street trees now were given.chosing chengdu city for example,analysing the data of street trees about 20 streets in town concentrated area which were typical in geographic and culture,the data including varieties,diameter,distance,number,proportion of evergreen and deciduous species,proportion of native tree and exotic species.The results showed that there were several problems now,there were certain monotone of the tree species,also too many evergreen species,and the native species were not development enough,and should keep optimizing structural feature of the street trees,enriching biodiversity,and the landscaping of our living town would be better.