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Cut induced VOC emissions from agricultural grasslands.

Davison, Brian and Brunner, A. and Ammann, C. and Spirig, C. and Jocher, M. and Neftel, A. (2007) Cut induced VOC emissions from agricultural grasslands. Plant Biology, 9 (Supple). e60-e68. ISSN 1435-8603

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Abstract

The introduction of proton transfer reaction mass spectrometry (PTR-MS) for fast response measurements of volatile organic compounds (VOC) has enabled the use of eddy covariance methods to investigate VOC fluxes on the ecosystem scale. In this study PTR-MS flux measurements of VOC were performed over agricultural grassland during and after a cut event. Selected masses detected by the PTR-MS showed fluxes of methanol, acetaldehyde, and acetone. They were highest directly after cutting and during the hay drying phase. Simultaneously, significant fluxes of protonated ion masses 73, 81, and 83 were observed. Due to the limited identification of compounds with the PTR-MS technique, GC-MS and GC-FID-PTR-MS techniques were additionally applied. In this way, ion mass 73 could be identified as 2-buta-none, mass 81 mainly as (Z)-3-hexenal, and mass 83 mainly as the sum of (Z)-3-hexenol and hexenyl acetates. Hexenal, hexenols, and the hexenyl ace-tates are mostly related to plant wounding during cutting. It was found that legume plants and forbs emit a higher number of different VOC species than graminoids.

Item Type: Article
Journal or Publication Title: Plant Biology
Uncontrolled Keywords: PTR-MS ; GC-FID ; GC-MS ; Grassland ; biogenic VOC ; wound compounds ; oxygenated VOC ; hexenyl acetate.
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Departments: Faculty of Science and Technology > Lancaster Environment Centre
ID Code: 26629
Deposited By: Dr Brian Davison
Deposited On: 12 Jun 2009 15:47
Refereed?: Yes
Published?: Published
Last Modified: 06 Sep 2013 19:20
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/26629

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