昆明市区6种落叶阔叶行道树经营管理效益成本分析

以昆明市区悬铃木、紫薇、柳树、重阳木、栾树和银杏6种落叶阔叶行道绿化树种为研究对象,通过对其在昆明市各区街道的数量分布、各类生长指标的实地调查,借助美国DAVIS城市森林研究中心的相关基础数据,对这6种行道树2004年或2005年一年中在阻滞尘埃、减少地表径流、吸收CO2、降解NOx、SOx以及房地产增值等方面的综合效益做了分析,并对其当年相应的各项抚育管理综合成本进行了计算。结果表明这些树种基本适应昆明市区的立地条件,生长状态良好;其抚育管理方案基本合理。调查分析当年的综合效益成本比均大于1,同时从生态学和经济学角度表明这些树种比较适合在昆明市区栽培;但紫薇除了用于分车带外,不适宜直接在人行道旁用作行道树栽培;有些树种在栽培方式及抚育管理方面需要改进。

Benefit-Cost Analysis on Management of 6 Deciduous Broad-leaved Avenue Trees in Kunming Urban Area

Taking six deciduous broad-leaved avenue trees namely Platanus spp., Lagerstroemia indica, Salix babylonica, Bischofia polycarpa, Koelreuteria paniculata and Ginkgo biloba in Kunming urban area as objectives, the study analyzes the integrated benefits of these 6 avenue trees in stopping dust, reducing surface retention, CO2 absorption and decomposition of NOx SOx and ozone as well as asset value increment in each year, based on the quantity distribution and on-the-spot survey of all kinds of growth indicators. Meanwhile, the corresponding all sorts of comprehensive cost for tending and management in same year has been calculated. The results show that these six species of avenue trees could basically adapt to the site condition and grow well in Kunming urban area, supported both from the point view of ecology and economics, and the tending and management of these trees were basically reasonable. Except as traffic block belt, Lagerstroemia indica is not suitable for avenue tree, and some of the cultivation means and measures for tending and management need to be improved.