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ARS Home » Research » Publications at this Location » Publication #154275
Title: MODELING LEAF AND CANOPY GAS EXCHANGE PROCESSES OF CORN

Author
item Kim, Soo Hyung
item Timlin, Dennis
item Reddy, Vangimalla

Submitted to: ASA-CSSA-SSSA Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 11/2/2003
Publication Date: 11/2/2003
Citation: Kim, S., Timlin, D.J., Reddy, V. 2003. Modeling leaf and canopy gas exchange processes of corn [abstract]. ASA-CSSA-SSSA Proceedings. Poster No. 215.

Interpretive Summary:

Technical Abstract: A coupled model of photosynthesis, leaf conductance, and transpiration was developed for maize leaves. The model was based on a biochemical model of C4 photosynthesis, a stomatal conductance model and the energy balance model. The model was calibrated using corn plants grown at ambient and elevated CO2 in Soil-Plant-Atmosphere-Research (SPAR) chambers. This leaf model was extended to predict whole-canopy photosynthesis and transpiration by combining with a radiative transfer model inside the canopy. The whole-canopy gas exchange simulations were compared with whole-canopy gas exchange measurements. Effects of elevated CO2 and increased temperature on photosynthesis and water use were evaluated using the canopy gas exchange model.