Releasing Of Volatile Organic Compounds From Primary Landscape Trees In Chengdu

Aiming to elaborate the role of the volatile organic compounds(VOCs)of landscape trees in caring health, experimental data were provided to landscape design of city in this paper with respect to chemoecology and landscape trees application. With multidisplinary methods, phyto-chemoecological, plant physio-ecological and landscape planting, combined with Thermal-desorption Cold Trap/Gas Chromatography/Mass Spectrometry(TCT/GC/MS),we determined the composition, concentration, as well as variation of the VOCs released from several important landscape trees. in Chengdu. Metasequoia glyptosteoboides, Platycladus orientalis cv. siebeldii, Eucalyptus robusta Smith., Hibiscus mutabilis L., Lagerstroemia indica L., Coleus blumei Bentha, Tagetes erecta L., Chlorophytum capense var.medio-pictum Hort. and Lonicera japonica Thunb., were analyzed.It was investigated: the major VOCs of conifer species are terpenes, especially monoterpenes; the major VOCs of having-flowers species are fatty esters, alcohols, aldehydes which have fruits odors, or terpenes; while the major VOCs of broadleaf species such as Eucalyptus robusta Smith., Hibiscus mutabilis L., are hydrocarbons which usually haven' t the atmosphere of aroma, but the content of terpenes decreased evidently. Trees release more VOCs on 9: 00~10:00am, and1: 00~5: 00pm in a day from the Hibiscus mutabilis L. and Coleus blumei Bentha.Based on the above results, it is suggested that not only visual landscape ecological effect but also olfactory chemoecological effect should be considered when...