A coupled model of photosynthesis-transpiration based on the stomatal behavior for maize (Zea mays L.) grown in the field

Author： Yu G-R. Kobayashi T. Zhuang J. Wang Q-F. Qu L-Q.

Publisher： Springer Publishing Company

ISSN： 0032-079X

Source： Plant and Soil, Vol.249, Iss.2, 2003-02, pp. : 401-415

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Abstract

The study presents a theoretical basis of a stomatal behavior-based coupled model for estimating photosynthesis, A, and transpiration, E. Outputs of the model were tested against data observed in a maize (Zea mays L.) field. The model was developed by introducing the internal conductance, g_ic, to CO₂ assimilation, and the general equation of stomatal conductance, g_sw, to H₂O diffusion, into models of CO₂ and H₂O diffusion through the stomata of plant leaves. The coupled model is easier for practical use since the model only includes environmental variables, such as ambient CO₂ concentration, leaf temperature, humidity and photosynthetic photon flux received at the leaves within the canopy. Moreover, concept of g_ic, and factors controlling A and E were discussed, and applicability of the model was examined with the data collected in the maize field.