Benefit-cost Analysis on Tending and Administration of 4 Major Species Planted as Street Trees in Kunming Urban Area

摘要

A quantitative benefit—cost analysis on tending and administration of four major species street trees, i.e. Platanus spp., Ficus concinna, Grevillea robusta, and Ginkgo biloba in the urban area of Kunming city was made for the year of 2004, based on field investigation and application of the corresponding database established by Center for Urban Forest Research in Davis, USDA. In consequence, the benefit-cost ratio (BCR) of each tree species in 2004 was obtained by calculating the annual monetary value of the comprehensive benefits produced by street tree population of each species and the annual total cost for tending and management of the street trees separately. The result showed that the BCR of each species was greater than 1, indicating the monetary value of the comprehensive benefits produced by each of these four species was more than that of the total cost, which meant that it was profitable to cultivate these species as street trees in Kunming. The order of the BCR values of these four species in 2004 was Platanus spp.(8.107) > Ficus concinna(2.579) > Ginkgo biloba( 1.543) > Grevillea robusta(1.055).