摘要
【目的】通过行道树生态经济价值分析,了解城市森林中树木发挥的各类生态效益,为校园行道树种植规划以及道路的合理分布提供参考。【方法】调查南京林业大学校园5个区域行道树树种组成、胸径和树高结构以及树木类型,共取得2 350株立木资料,分析研究校园行道树结构组成,并运用i-Tree模型对对校园行道树进行定量的森林效益评估,包括节能效益、净化空气效益、吸收二氧化碳效益、截留雨水效益和美学效益5个方面,并将效益值转化为相应的经济价值。【结果】研究区行道树属于31科49属54种,树木种类多为落叶阔叶型乔木,其中樱花、二球悬铃木、马褂木、樟树和银杏的数量最多;以胸径为≥8～46 cm的树种为主,其中胸径为≥8～15 cm的441株,占18.77%;≥15～30 cm的1 132株,占48.17%;≥30～46 cm的507株,占21.57%。通过i-Tree模型对南京林业大学行道树的总生态效益评估可得,研究区主要道路上的2 350株行道树年创造总效益值为1 023 101.29元,其中校园行道树的美学效益最高,占总效益的65.67%;其次是截留雨水效益,占总效益的17.05%,节能效益占总效益的13.02%;减少CO_2效益与改善空气质量效益比分别占总效益的2.65%、1.61%。各个区域中,教学区为行道树主要种植区,效益最高,占总效益的43.62%;其次是居民区,占总效益的19.43%;行政区、活动区和生活区分别占总效益的15.17%、11.21%和10.56%。不同的树种在各生态效益上的贡献率不同,二球悬铃木、银杏、马褂木、樟树的总生态效益贡献率最高,占总量的比例分别为21.97%、18.09%、14.50%、8.57%,共占生态总效益的63.13%,超过了总效益的一半。【结论】研究区总树种类型丰富,多样性高,但在活动区缺少高大乔木。生活区节能效益和改善空气质量效益低,建议种植枫杨、七叶树等树种。居民区水杉、银杏和二球悬铃木树种分布均匀度最高,所�
【Objective】Urban street trees are an important part of urban forests.They help beautify cities,regulate and improve urban climate,purify the air,reduce the urban heat island effect,prevent dust,and reduce noise.Street trees play an important role in maintaining the urban ecological balance and improving the environment.Based on survey data of campus street trees at Nanjing Forestry University,the research gave evaluation of the ecological benefit for the study area.【Method】i-Tree tool is a model that is specifically used for research on the benefits of urban forest systems.The i-Tree streets tool is a module that specifically evaluates the economic benefit of the urban street trees system.There is no limit on study size;it can be used to analyze a large research area or it can be used to examine a small area,such as a street.This tool explores the ecological functions of the urban street tree system and provides references for the management,planning,and planting strategies of urban street trees.Inventory data was surveyed for five regions of the campus(active,residential,teaching,living and administrative).Diameter and tree height were recorded for 2 350 trees and species composition was analyzed.Then the i-Tree module was used to build an ecological model.Five factors were calculated:energy-saving benefit,storm water retention benefit,air quality improvement benefit,CO2 absorption benefit,and aesthetic benefit.【Result】A total of 2 350 trees were examined during the field survey,which included 54 species belonging to 31 families and 49 genera.Most trees were deciduous and broad-leaved,including Prunus serrulata,Platanus hybrida,Liriodendron,Cinnamomum sp.and Ginkgo.These are the main tree species that constituted the street tree system,accounting for 48.5%of the total number of trees examined.The Prunus serrulata and Ginkgo were mainly planted in active regions,Platanus hybrida was mainly planted in residential regions,Liriodendron was mainly planted in teaching regions,and Cinnamomum sp.was mainly p
作者
熊金鑫
祁慧君
王倩茹
汪倩如
王少华
左文涛
孙圆
XIONG Jinxin;QI Huijun;WANG Qianru;WANG Qianru;WANG Shaohua;ZUO Wentao;SUN Yuan(Co-Innovation Center for Sustainable Forestry in Southern China,Nanjing Forest it University,Nanjing 210037,China;College of Forestry,Nanjing Forestry University,Nanjing 210037,China;College of Information Scienceand Technology,Nanjing Forestry University,Nanjing 210037,China)
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2019年第2期128-136,共9页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
国家重点研发计划(2017YFD0600904)
中国博士后科学基金项目(2016M601822)
南京林业大学大学生实践创新训练项目(2018NFUSPITP064)
