深圳市显著排放VOCs的园林植物调查与分析

Investigation on Emission Properties of Biogenic VOCs of Landscape Plants in Shenzhen

对深圳地区的主要园林树种、地带性植被的代表种共计158种植物释放的生物源的挥发性有机物(biogenic volatileorganic compounds,BVOCs)采用流动式、封闭式采样法采样,运至美国进行GC-MS分析测量.结果表明,短穗鱼尾葵(Caryotamitis)、海红豆(Adenanthera pavonina var.microsperma)、杧果(Mangifera indica)、海漆(Excoecoria agalloch)等31种植物具有释放异戊二烯的能力;另有鸡蛋果(Passiflora edulis)、小琴丝竹(Bambusa glaucescens cv.silverstripe)、山苍子(Litsea cubeba)、大型双子铁(Dioon spinulosum)等52种植物具有释放单萜烯类化合物的能力.对红树植物的测量表明,该类植物普遍具有释放单萜烯的能力.上述结果为建立深圳及周边地区的环境质量模型提供了重要数据,同时也可为我国热带亚热带城市大面积绿化以及经济林、生态林和防护林等的树种选择提供参考.

Isoprene and monoterpene emissions were characterized using flow and enclosure sampling method and GC-MS in USA for 158 species of plants growing in Shenzhen,China.This survey was designed to include all of the dominant plants within the Shenzhen region as well as unique plants such as Cycads.These are the first measurements in a subtropical Asian metropolis.Substantial isoprene emissions were observed from thirty-one species,including Caryota mitis,Adenanthera pavonina var.microsperma,Mangifera indica and Excoecoria agalloch.Monoterpene emissions were observed from fifty-two species,including Passiflora edulis,Bambusa glaucescens cv.silverstripe as well as some primitive and rare Cycadaceae and Cyatheaceae plants.For the first time some of red plants have been measured,most of them have the ability of releasing terpene.These results will be used to develop biogenic emission model estimates for Shenzhen and the surrounding region that can be used as inputs for regional air quality models.