摘要
定量测算城市绿地乔木固碳能力及抵消碳排放,可为森林城市建设的树种选择和配置提供决策支持。基于高清卫星遥感影像数据和有关经济社会统计数据,结合实地调查,利用生物量模型法测算南充市主城区绿地乔木的固碳能力,探讨群落结构与固碳能力的影响;分析抵消城市能源CO_(2)排放的成效。结果表明:1)南充市主城区绿化植被中木本植物共269种,分属76科163属。出现频度最高的为桂花、银杏、黄葛树、天竺桂、樟木、樱花等10个树种。2)各类绿地林分平均密度677±425株·hm^(-2),平均胸径21.01±7.15 cm,平均树高8.52±2.06 m。3)各类绿地碳密度按大小为广场用地>附属绿地>公园绿地>防护绿地;固碳速率最大的是附属绿地(2.54 t·hm^(-2)·a^(-1)),最小的是公园绿地(1.64 t·hm^(-2)·a^(-1))。4)南充市主城区绿地乔木2020年碳固定量为9 347 t,能源CO_(2)总排放量为1 016.55万t,绿地乔木大约抵消城市能源0.09%CO_(2)的排放量。最后,建议南充市在城市森林营建过程中,应优先考虑多树种混合使用,并适时调整群落密度以优化林分结构、改善生境条件,促进林木整体水平的生长,进而提高群落的固碳能力;同时尽量采用近自然、较为粗放的经营方式,以减少碳排放。
The quantitative measurement of carbon sequestration capacity and carbon offsetting effects of trees in urban green spaces can provide supports for the decision-makings on tree species'selection and configuration in forest city building.With high-definition satellite remote sensing image and relevant economic and social statistical data,combined with the data from field investigations,the paper uses the method of biomass model to calculate the carbon sequestration capacity of landscaping trees in the urban area of Nanchong,based on which the interactions of community structure and carbon sequestration capacity are explored,and also analyzes the effects of carbon offsetting the emission of the energy sector in the city.The results show that:1)There are 269 species of woody plants in the green spaces of the urban area of Nanchong,belonging to 163 genera in 76 families.The 10 tree species with the highest presence are Osmanthus fragrans,Ginkgo biloba,Ficus virens Aiton,Cinnamomum japonicum,C.camphora,Prunus serrulata,F.concinna,P.cerasifera,F.atropurpurea,Acer palmatum Michelia×alba;2)The average density of forest stands in various green spaces is 677±425 plants·hm^(-2),with an average diameter at breast height at 21.01±7.15 cm and an average tree height at 8.52±2.06 m;3)The average carbon density of the trees in green spaces can be ranked as square>affiliated green spaces>park green spaces>protective green spaces.Affiliated green spaces have the highest carbon sequestration rate(2.54 t·ha^(-1)·a^(-1)),while the lowest is in park green spaces(1.64 t·ha^(-1)·a^(-1));and 4)The amount of carbon sequestrated by the trees in green spaces in the urban area of Nanchong City in 2020 is 9347 t,and the total energy-related CO_(2) emissions are 1016.55×10^(4) t,which means that the trees in green spaces approximately offset 0.09% of carbon emitted by urban energy use.It is suggested that Nanchong should prioritize the mixed use of multiple tree species in its building of urban forest,and the tree community density sh
作者
陈俊华
黎晓平
李羽洁
慕长龙
谢川
刘一丁
谢天资
简毅
Chen Junhua;Li Xiaoping;Li Yujie;Mu Changong;Xie Chuan;Liu Yiding;Xie Tianzi;Jian Yi(Sichuan Key Laboratory of Ecological Restoration and Conservation for Forest and Wetland,Sichuan Academy of Forestry,Chengdu 610081,China;Nanchong Forestry Bureau,Nanchong 63700,Sichuan,China;Chengdu Shuyu Technology Co.,Ltd.,Chengdu 610000,China)
出处
《中国城市林业》
2024年第3期26-33,共8页
Journal of Chinese Urban Forestry
基金
四川省创新团队岗位项目(2024LCTD0107)
四川省林业科学研究院科技成果转化项目(川林研工咨2020025)。
关键词
城市绿地
乔木
碳密度
固碳速率
生物量
南充市
urban green space
arbor
carbon density
carbon sequestration rate
biomass
Nanchong city
