昆明市区6个常绿行道树种经营管理效益成本比较分析

The Comparison of Benefit Cost of 6 Evergreen Avenue Tree Species' Management in Kunming City Area

以昆明市区6个常绿行道绿化树种广玉兰、杜英、天竺桂、大叶女贞、雪松和塔柏为研究对象,对其在市区街道的数量分布、各类生长指标进行实地调查,基于美国DAVIS城市森林研究中心的相关数据,对这些树种调查当年在阻滞尘埃、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,以及抚育管理的综合成本进行计算、对比和分析。结果表明,它们大多生长良好,基本适应昆明市区的立地条件。除大叶女贞外,其余树种综合效益成本比均大于1(大叶女贞为0.63),从生态学和经济学角度看,这些行道树种选择比较合理。

Taking 6 evergreen avenue tree species including Magnolia grandiflora L. , Elaeocarpgs decipiens Hemsl. , Cinnamomum japnicum Sieb. , Ligustrum lucidum Ait. , Cedrus deodara, and Sabina chinensis cv. pyramidalis in Kunming city area as research objects, the field survey on quantity distribution and all kinds of growth indicators are conducted, based on the relevant data from DAVIS city forest study center in USA. In detail, both the comprehensive benefit in the aspects of blocking dust, lessening water sheet runoff, absorpting CO2, dispelling NOx, SOx and increasing in value of real estate, etc, and comprehensive cost for tending management are calculated, compared and analyzed. The result shows that most of them grow well and basically adaptable to the site condition of Kunming city. Except Liggstrum lucidum Ait. , the comprehensive benefit vs. cost of others is bigger than 1. From the perspectives of ecology and economics, such avenue tree species selection is comparatively reasonable.