沈阳市行道树树种的选择与配置

Selection and configuration of street tree species in Shenyang

采取典型抽样的方法对沈阳市行道树进行了全面的群落调查。结果表明 ,研究区内行道树共 13科 ,2 4属 ,2 2 91株 ,森林覆盖率为 15 13%。胸径 <0 2 5m(1级胸径 )和 0 2 5～ 0 5m(2级胸径 )的树木分别占 4 3 0 %、17 9% ;树高 <4 6m (1级 )的树木占 4 9 8% ,介于 4 6～10 7m(2级 )为 4 3 3% ;健康状况为中等以上 ,沈阳市行道树处于种群稳定时期 ,但树种多样性指数不高 ,结构单一。根据城市的自然条件和行道树的选择标准 ,提出了沈阳市行道树树种选择与配置的对策与建议。

Systematic community investigation into street trees in Shenyang was carried out using typical sampling method. Results showed that there were 2291 trees in the investigated area, belonging to 13 families, and 24 genera. The forest coverage was 15.13%. Trees with DBH (diameter at breast height) <0.25m and DBH between 0.25～0.5m accounted for 43.0% and 17.9% of the total, respectively. Trees with height <4.6 m accounted for 49.8% of total, and trees with height between 4.6～10.7m accounted for 43.3%. The healthy status of the trees was above middle level. These demonstrated that street trees in Shenyang were in a stable phase. However, the diversity index of the trees was not very high and structure of the trees was simple. Some suggestions and strategies were put forward for street tree species selection and configuration, based on current natural condition in Shenyang and the criteria for the selection of street tree species.