| 北京地区植物VOCs排放速率的测定 |
| 摘要点击 3027 全文点击 1955 投稿时间：2002-04-11 修订日期：2002-07-01 |
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| 中文关键词 VOCs 异戊二烯 单萜烯 排放速率 |
| 英文关键词 VOC isoprene monoterpenes emission factor |
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| 中文摘要 |
| 植物释放的挥发性有机化合物(VOCs)主要集中在异戊二烯和单萜烯上,这些种类的化合物占生物圈VOCs释放量2/3.采用封闭式采样和气相色谱分析对北京地区23种典型植物异戊二烯和单萜烯排放速率进行测定和研究,发现阔叶树(如槐,垂柳等)主要释放异戊二烯;而针叶树(如油松)和果树主要释放单萜烯.同时发现植物异戊二烯的释放受光照和温度的影响,而单萜烯的释放则主要受温度的影响. |
| 英文摘要 |
| The VOCs emissions from plants are mainly isoprene and monoterpenes, which account for 2/3 of the total emissions from biosphere. 23 kinds of typical plants in Beijing area were screened to estimate the emission rates of isoprene and monoterpenes by adopting a bag-enclosure sampling method followed by a GC-FID analysis. It was found that such deciduous trees as Sophora japnica and Salix babyloniaca etc. were mainly emitting isoprene and coniferous trees as Pinus tabulaetormis mainly released monoterpenes. The study also showed that the emission of isoprene were affected by both temperature and Photosynthetic Active Radiation(PAR), while monoterpene emissions were mainly temperature-dependent. |
