BVOC emissions from mechanical wounding of leaves and branches of Eucalyptus sideroxylon (red ironbark)

摘要: Emissions of biogenic volatile organic compounds (BVOCs) from mechanical wounding leaves and branches plants can contribute to the atmospheric burden (VOCs) in both (a) urban airsheds (from garden maintenance) (b) global atmosphere large scale forest harvesting). These emissions BVOCs are poorly understood quantified, their role inventories neglected. This paper presents measurements magnitude, duration composition BVOCs, carbon dioxide (CO2) methane (CH4) freshly cut leaf mulch wood chips derived a common eucalypt tree, Eucalyptus sideroxylon (red ironbark), found southeastern Australian forests gardens. The shredded E. were be 2.3 ± 0.6 0.05 0.04 mg g-1 DM (Dry Mass) respectively last typically for 1 day following cutting. Three sampling techniques used VOC speciation 12 most abundant released materials identified. specific emitted order decreasing abundance are: stored plant oils, 1,8-cineole, α–pinene o-cymene which make up major part emissions, minor contribution chemicals associated with environmental stress wound defence, (Z)–3–hexenyl acetate, (E)-2-hexenal (Z)-3-hexen-1-ol, (c) second metabolic products, acetaldehyde acetone. observed integrated mulching equivalent more than half perhaps all likely oils leaves. For two comparable studies available, one (this study) without defence same range plants. In oil about factor 11 larger emission rate BVOCs. A compilation available BVOC indicates that dominate, whereas other plants, dominate emissions.