北京市常用园林树种全生命周期碳收支  

Carbon budget of common urban tree species in Beijing based on life cycle assessment

作　　者：钱璟 廖莎 范舒欣 沈思栋 李涵 张梦园 董丽 QIAN Jing;LIAO Sha;FAN Shuxin;SHEN Sidong;LI Han;ZHANG Mengyuan;DONG Li(College of Landscape Architecture,Beijing Forestry University,Beijing Laboratory of Urban and Rural Ecological Environment,National Engineering Research Center for Floriculture,Beijing 100083,China;China Construction YIPIN Investment&Development Co.,Ltd.,Wuhan 430074,China)

机构地区：[1]北京林业大学园林学院,城乡生态环境北京实验室,国家花卉工程技术研究中心,北京100083 [2]中建壹品投资发展有限公司,武汉430074

出　　处：《生态学报》2024年第17期7490-7506,共17页Acta Ecologica Sinica

基　　金：国家重点研发计划项目(2022YFC3802602);华北地区绿化固碳增汇系统研究项目(CSCEC3B-2022-26)。

摘　　要：城市绿地中园林树木的光合固碳能力对中和城市温室气体排放、调节城市碳平衡具重要意义,但园林树木的栽植及养管等过程也会产生碳排放,因此全面科学地评价园林树木的净固碳能力必须综合考虑全生命周期碳的收支两个方面。基于全生命周期理论,通过生物量方程法和排放因子法核算了北京市32种常用园林树种全生命周期碳固定量和碳排放量。结果显示,北京市一级养护管理标准下供试树种全生命周期碳固定量和碳排放量均值分别为222.441 kg/株和90.545 kg/株。不同生活型园林树种全生命周期碳固定量和碳排放量存在明显分级,总体上均表现为落叶乔木>常绿乔木>小乔木>灌木。一球悬铃木、美国红梣、毛白杨、栾树等21种植物对城市绿地碳汇功能具正向效应。小叶黄杨、冬青卫矛、碧桃、紫叶李等11种植物对城市绿地碳汇功能具负向效应,其原因除了在于自身生物学特征外,也与为追求特定景观效果而采取的园林应用方式有关。结合研究结果从增汇与减排两方面提出了低碳植物景观营建策略。The carbon sequestration capacity of urban trees plays an important role in offseting urban greenhouse gas emissions and regulating urban carbon balance.However,greenhouse gas will also be generated in the process of planting and maintenance of urban trees.From the perspective of carbon budget,the net carbon sequestration capacity of urban trees can be evaluated more comprehensively and scientifically.Based on life cycle assessment,the biomass equation method and emission factor method were used to calculate the life cycle carbon sequestration and carbon emission of 32 urban woody tree species in Beijing.The results showed that the average life cycle carbon sequestration and carbon emission of the tested tree species were 222.441 kg/plant and 90.545 kg/plant,respectively,under the Beijing primary conservation management standard.The carbon sequestration and carbon emission in the whole life cycle of different life types of urban tree species were obviously graded,and the overall performance was deciduous arbor>evergreen arbor>small arbor>shrub.Twenty-one species such as Platanus acerifolia,Fraxinus pennsylvanica,Populus tomentosa and Koelreuteria paniculata had positive effects on the carbon sink capacity of urban green space,while eleven species such as Buxus sinica var.parvifolia,Euonymus japonicus,Prunus serrulata var.lannesiana were the opposite.The reason is not only related to their biological characteristics,but also related to their application form in pursuit of specific ornamental effects.Based on the research results,low-carbon plant landscape construction strategies are proposed from the aspects of carbon sink increase and carbon emission reduction.

关 键 词：碳收支 全生命周期理论 园林树种 碳汇 

分 类 号：X322[环境科学与工程—环境工程] S731.2[农业科学—林学]