行道绿化树种选择及其栽培管理中的经济学原则

相对于其它城市森林类型,行道树的功能突出,而其生长环境却最为恶劣。在相同的立地条件和相近的抚育管理条件下,行道树树种的选择与栽培管理对街道绿化、美化的景观效果以及行道树体系在减少地表径流、改善小环境气候、净化空气、节能降耗、房地产增值等方面的社会、生态与经济综合效益的发挥起着决定性作用。行道树树种的选择除了要遵循景观规划中的美学原则和适地适树的生态学原则之外,栽培管理方便、综合效益高、经营管理效益成本比值大的经济学原则,也应该成为行道树树种规划选择和栽培管理的重要原则。

Economic Principles of Species Screening, Cultivating and Tending of Street Trees in Urban Area

The street trees have prominent functions while the living environment for street trees is relatively the worst compared to other types of urban forest. Species screening and cultivating of street trees are critical to determine the overall landscaping effect and the comprehensive social, ecological and economic benefits of street trees including ground water flow reduction, microclimate amelioration, air quality improvement, energy saving and property value increment under the same site conditions with similar tending and administration. Apart from adhering to aesthetic principle of landscape architecture and ecological principle of 'planting the right tree species in the right localities', it was suggested that economic principles of easy cultivating and tending, great comprehensive benefits with high value of benefit-cost ratio should be set as important principles of species screening, cultivating and tending of street trees in the future.