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Acta Agronómica

Print version ISSN 0120-2812

Abstract

ROMERO CUELLAR, Jonathan; TORRENTE TRUJILLO, Armando; OBREGON NEIRA, Nelson  and  TORRES, Andrés. A coupled model of stomatal conductance, photosynthesis and transpiration for passionfruit (Passiflora edulis) cultivars. Acta Agron. [online]. 2013, vol.62, n.1, pp.42-51. ISSN 0120-2812.

At present, crop behavior due to climate change is not well known, in particular those responses related to water and energy balances. The aim of this work was to propose and implement a model aimed to evaluate interactions among photosynthesis, stomatal conductance and transpiration phenomenon under both crop growing process and tropic climate conditions. A passion fruit crop located in Colombia (Huila Department) is taken as a study case. The actual transpiration estimated by the model was evaluated using a gravimetric type lysimeter. The results indicated that the proposed model was able to estimate the passion fruit crop transpiration under conditions in the tropic climate with a good validation of 0.30. The mean daily transpiration rate under wet weather conditions during the study period was 1.36 mm d-1.Sensitivity analysis indicated that the parameter m is identified and is highly sensitive for the case study, however, VM25, KC25, JM25, Ko25, f, B parameters showed poor sensitivity and identification.

Keywords : Mathematical modeling; MCAT; Passion fruit; Sensitivity analysis; temperature weather.

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