Modelling ozone stomatal flux of wheat under mediterranean conditions

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• 作者：I. Gonzá ; lez-Ferná ; ndez^a ; ^{ignacio.gonzalez@ciemat.es} ; V. Bermejo^a ; ^{victoria.bermejo@ciemat.es} ; S. Elvira^a ; ^{susana.elvira@ciemat.es} ; D. de la Torre^b ; ^{daniel.delatorre@upm.es} ; A. Gonzá ; lez^c ; ^{agueda.gonzalez@madrid.org} ; L. Navarrete^c ; ^{luis.navarrete@madrid.org} ; J. Sanz^a ; ^{javier.sanz@ciemat.es} ; H. Calvete^a ; ^{hector.calvete@ciemat.es} ; H. Garcí ; a-Gó ; mez^a ; ^{hector.garcia@ciemat.es} ; A. Ló ; pez^d ; ^{antoni.lopez@irta.cat} ; J. Serra^e ; ^{joan.serra@irta.cat} ; A. Lafarga^f ; ^{alafarga@itga.com} ; A.P. Armesto^f ; ^{aarmesto@itga.com} ; A. Calvo^g ; ^{antonio.calvo.navallas@madrid.org} ; R. Alonso^a ; ^{rocio.alonso@ciemat.es}
• 关键词：Triticum aestivum ; Triticum durum ; Phenology ; Stomatal conductance ; Ozone risk assessment ; Phytotoxic ozone dose
• 刊名：Atmospheric Environment
• 出版年：2013
• 出版时间：March, 2013
• 年：2013
• 卷：67
• 期：Complete
• 页码：149-160
• 全文大小：658 K

文摘

Correct estimation of leaf-level stomatal conductance (g_sto) is central for current ozone (O₃) risk assessment of wheat yield loss based on the absorbed O₃ phytotoxic dose (POD). The g_sto model parameterizations developed in Europe must be checked in the different climatic regions where they are going to be applied in order to reduce the uncertainties associated with the POD approach.

This work proposes a new g_sto model parameterization for estimating POD of Triticum aestivum and Triticum durum under Mediterranean conditions, based on phenological observations over 25 years and g_sto field measurements during 5 growing seasons. Results show that POD in the Mediterranean area might be higher than previously estimated. However, caution must be paid when assessing the risk of yield loss for wheat in this area since field validation of O₃ impacts is still limited.