Modelling the response of wheat canopy assimilation to atmospheric CO2 concentrations

Rodriguez, D., Ewert, F., Goudriaan, J., Manderscheid, R., Burkart, S. and Weigel, H. J. (2001) Modelling the response of wheat canopy assimilation to atmospheric CO2 concentrations. New Phytologist, 150 2: 337-346. doi:10.1046/j.1469-8137.2001.00106.x


Author Rodriguez, D.
Ewert, F.
Goudriaan, J.
Manderscheid, R.
Burkart, S.
Weigel, H. J.
Title Modelling the response of wheat canopy assimilation to atmospheric CO2 concentrations
Journal name New Phytologist   Check publisher's open access policy
ISSN 0028-646X
1469-8137
Publication date 2001-05-01
Year available 2001
Sub-type Article (original research)
DOI 10.1046/j.1469-8137.2001.00106.x
Open Access Status Not yet assessed
Volume 150
Issue 2
Start page 337
End page 346
Total pages 10
Place of publication Oxford, United Kingdom
Publisher Wiley-Blackwell
Language eng
Formatted abstract
The predictive capacity of two simulation models with different degrees of complexity for the calculation of assimilate production, was tested at different time scales, using a data set of wheat grown in an open-top-chamber experiment at two CO2 concentrations. • Observed values of net canopy assimilation (Pn) were obtained from wheat plants grown at ambient (410 μmol mol-1) and elevated (680 μmol mol-1) CO2 mole fractions. Pn was simulated by using either simple multiple regression equations (AFRCWHEAT2) or by highly detailed calculations of leaf energy balances and the coupling of photosynthesis with stomatal conductance (LINTULCC2). • Irrespective of the developmental stage of the crop or variation in weather, the models accurately simulated canopy assimilation and growth. We conclude that the response of aboveground-biomass production to elevated CO2 concentrations was explained primarily by the effects of CO2 on radiation-use efficiency and assimilate production. • The models explained satisfactorily the daily course of Pn, its integrated daily totals, and the seasonally produced aboveground biomass, both at ambient and elevated CO2 concentrations. Specific problems in the simulations were identified and discussed.
Keyword Triticum aestivum (wheat)
Co2
Modelling
Canopy photosynthesis
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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Created: Tue, 08 Mar 2011, 01:22:55 EST