基于三维绿量的林分生态效益测算与分析——以上海浦江郊野公园为例

Ecological Benefits and Value Assessment of Forest Stands Based on Three-Dimensional Green Volume——A Case Study of Pujiang Country Park of Shanghai

为了精确地评估城市绿地生态效益及价值,提高郊野公园的经营管理水平,选取上海浦江郊野公园的5种典型林分香樟、栾树、桂树、无患子、池杉为研究对象,在逐株实测的基础上,根据绿量方程计算三维绿量,通过三维绿量换算林分产生的生态效益,再利用生态经济学方法评估生态效益价值。结果表明:所选5个林分在0.648 5 hm^2的总面积上创造的生态效益价值为23.07万元,合35.57万元/hm^2。单位面积的生态效益,在产氧量和吸收CO_2量方面,香樟>栾树>桂树>池杉>无患子;在吸收SO_2量、滞尘量(TSP)、夏季蒸腾量方面,香樟>栾树>池杉>桂树>无患子;各林分的单位面积总生态效益价值香樟>栾树>桂树>池杉>无患子。林分生态效益及价值与三维绿量呈正相关关系。

In order to accurately assess the ecological benefits and value of urban green space, improve the management level of country parks, we took 5 typical forest stands(Cinnamomum cam Phora;Koelreuteria paniculata;Osmanthusfragrans;Sapindus mukorossi Gaertn;Taxodiumascendens) as an objects of study in Pujiang country park of Shanghai, used green quantity equation to calculate the three-dimensional green volume of plants, used the three-dimensional green volume to convert the ecological benefit produced by Stands, and the ecological benefits values of five forest stands were estimated by using several ecological economic methods based on the measurement of each tree. The results showed that the ecological benefit values of the selected five forest stands on the total area of only 0.648 5 hectares was 230 700 yuan/year, equivalent to 355 700 yuan/hm^2;with respect of releasing Oxygen quantity and absorbing carbon dioxide quantity, the ecological benefits per hectare decreased in the order: Cinnamomum cam Phora>Koelreuteria paniculata>Osmanthus fragrans>Taxodium ascendens>Sapindus mukorossi Gaertn;with respect to absorption sulphur dioxide quantity, laying dust quantity and transpiration quantity decreased in the order: Cinnamomum cam Phora>Koelreuteria paniculata>Taxodium ascendens>Osmanthus fragrans>Sapindus mukorossi Gaertn;value of ecological benefit per hectare of each stand Order decreased in the oder: Cinnamomum cam Phora>Koelreuteria paniculata>Osmanthus fragrans>Taxodium ascendens>Sapindus mukorossi Gaertn. There is a positive correlation between the ecological benefit of stand, its value and three-dimensional green volume.