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Updated stomatal flux and flux-effect models for wheat for quantifying effects of ozone on grain yield, grain mass and protein yield

Grünhage, Ludger; Pleijel, Håkan; Mills, Gina; Bender, Jürgen; Danielsson, Helena; Lehmann, Yvonne; Castell, Jean-Francois; Bethenod, Olivier. 2012 Updated stomatal flux and flux-effect models for wheat for quantifying effects of ozone on grain yield, grain mass and protein yield. Environmental Pollution, 165. 147-157. 10.1016/j.envpol.2012.02.026

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Abstract/Summary

Field measurements and open-top chamber experiments using nine current European winter wheat cultivars provided a data set that was used to revise and improve the parameterisation of a stomatal conductance model for wheat, including a revised value for maximum stomatal conductance and new functions for phenology and soil moisture. For the calculation of stomatal conductance for ozone a diffusivity ratio between O3 and H2O in air of 0.663 was applied, based on a critical review of the literature. By applying the improved parameterisation for stomatal conductance, new flux-effect relationships for grain yield, grain mass and protein yield were developed for use in ozone risk assessments including effects on food security. An example of application of the flux model at the local scale in Germany shows that negative effects of ozone on wheat grain yield were likely each year and on protein yield in most years since the mid 1980s.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1016/j.envpol.2012.02.026
Programmes: CEH Topics & Objectives 2009 - 2012 > Biogeochemistry
CEH Sections: Emmett
ISSN: 0269-7491
Additional Information. Not used in RCUK Gateway to Research.: The attached document is the author’s version of a work that was accepted for publication in Environmental Pollution. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Environmental Pollution, 165. 147-157. 10.1016/j.envpol.2012.02.026 www.elsevier.com/
Additional Keywords: ozone, diffusivity ratio, stomatal flux, flux-effect models, wheat, food security
NORA Subject Terms: Agriculture and Soil Science
Atmospheric Sciences
Date made live: 21 Jan 2013 10:22 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/21008

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