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天津市常用绿化树种挥发性有机物排放潜力估算研究
张倩,李洪远,贺梦璇,吕铃钥,杨佳楠,等
作者单位E-mail
张倩 南开大学环境科学与工程学院 zhangqian921204@163.com 
李洪远 南开大学环境科学与工程学院  
贺梦璇 南开大学环境科学与工程学院  
吕铃钥 南开大学环境科学与工程学院  
杨佳楠 南开大学环境科学与工程学院  
摘要:
植被释放的挥发性有机物(BVOCs)对PM2.5等大气颗粒物的形成有重要贡献。对天津市城市绿地常见绿化树种BVOCs样品进行采集与鉴定,基于Guenther提出的模型估算了天津市32种常见绿化树种BVOCs的排放量,并对估算过程中的不确定性因素进行分析。结果表明:构树、毛白杨、旱柳和绦柳的BVOCs排放量最高,分别为2179.438 g C.tree-1.a-1、2147.394 g C.tree-1.a-1、2116.537 g C.tree-1.a-1、2045.722 g C.tree-1.a-1。从科属的角度,杨柳科植物BVOCs排放的最多,豆科、桑科和松科BVOCs排放量其次。采用聚类分析方法将32种绿化树种的异戊二烯、单萜烯排放潜力进行分类,其中毛白杨、构树、旱柳和绦柳属于高排放异戊二烯的树种;油松和苹果属于高排放单萜烯的树种。从科属水平而言,豆科和杨柳科植物具有较强的异戊二烯排放潜力。松科、柏科和部分蔷薇科的乔木具有较强的单萜排放潜力。从叶片类型的角度上,阔叶树主要以排放异戊二烯为主,针叶树主要以排放单萜烯为主,且异戊二烯的排放潜力要大于单萜烯的排放潜力。植物OVOCs排放潜力与异戊二烯和单萜烯的排放潜力相比显著较弱。天津市外来树种与本地树种BVOCs排放潜力无显著性差异(P>0.05)。
关键词:  挥发性有机物  绿化树种  异戊二烯  单萜烯  排放潜力
DOI:
分类号:
基金项目:国家自然科学“不同生境下城市绿化树种VOCs排放影响机制及估算模型研究”(31370700)
Study on the Estimation of Volatile Organic Compounds Emission from Common Greening Tree Species in Tianjin
Qian Zhang,Hongyuan Li,Mengxuan He,Lingyue Lv,Jianan Yang,et al
Abstract:
The biogenic volatile organic compounds emissions(BVOCs) make a significant contribution on the formation of atmospheric particulates such as PM2.5 etc. By the field survey of the greening status quo of urban greenbelt in Tianjin and indentifying the components of BVOCs, and based on the estimation model proposed by Guenther, the BVOCs emissions of 32 common greening tree species were estimated and the uncertain factors were analyzed . The results showed that Broussonetia papyrifera,Populus tomentosa,Salix matsudana and Salix matsudana f. pendula exhibited the highest BVOCs emission potential which were 2179.438 g C.tree-1.a-1、2147.394 g C.tree-1.a-1、2116.537 g C.tree-1.a-1、2045.722 g C.tree-1.a-1respectively. On families and genera, the most BVOCs emissions family was the Salicaceae, followed by the Leguminosae, Moraceae and Pinaceae. Isoprene and monoterpene emission potential released by 32 greening tree species were classified by clustering analysis. Broussonetia papyrifera, Populus tomentosa,Salix matsudana and Salix matsudana f. pendula were categorized as high isoprene emitters. Pinus tabulaeformis and Malus pumila belong to high monoterpene emitters. On families and genera, Leguminosae and Salicaceae exhibited the higher isoprene emission potential. Pinaceae, Cupressaceae and part of Rosaceae trees exhibited the higher monoterpene emission potential. From the perspective of leaves type, broad-leaved trees mainly released isoprenes and monoterpenes were released by needle-leaved trees primarily. Moreover, the isoprene emission potential was greater than the monoterpenes. Compare with isoprenes and monoterpenes, OVOCs emission potential was weaker obviously. In addition, there was no significant difference in the emission potential of BVOCs released by exotic species and native species in Tianjin (P> 0.05).
Key words:  volatile organic compounds  greening tree species  isoprenes  monoterpenes  emission potential