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Simuler avec le modèle bioclimatique ThermiPig les performances des porcs en croissance en tenant compte des conditions climatiques et des caractéristiques de la salle d’engraissement

Abstract : The dynamic model ThermiPig was developed to simulate thermal balance at the fattening room scale, as the result of the balance between the heat produced by the group of pigs or provided by incoming air and equipment and that lost due to air renewal or thermal conductivity of the walls and ceiling. A growth model (assuming thermoneutral conditions, InraPorc) and a bioclimatic model (ThermiSim) were combined to create ThermiPig; it considers a common time step (1 hour), definition of the pig thermoneutral zone, evaluation of impacts of cold and hot exposure on the amount of available energy for growth, and the circadian distribution of heat produced daily by each pig. Data collected in vivo were used to evaluate the accuracy of the prediction of ambient temperature, which averaged 0.6°C (RMSEP, error of prediction). ThermiPig was used to simulate impacts of alternative regulations for ventilation or the use of new equipment (heater, pad cooling) on growth performance of pigs, N excretion, and indirect energy (from feed intake) and direct energy (from electricity consumed by equipment) consumption. Comparison of multi-criteria performance in silico helps identify the most interesting option. Economic performance depends on carcass value (based on the French payment grid) minus costs of feed intake and electricity (depending on the energy source). However, more accurate prediction of carcass value is expected in the next version of the model by considering effects of ambient temperature on the distribution of body fat and protein metabolism.
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https://hal.inrae.fr/hal-03167771
Contributor : Ludovic Brossard <>
Submitted on : Friday, March 12, 2021 - 1:40:41 PM
Last modification on : Thursday, September 16, 2021 - 5:34:14 PM

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  • HAL Id : hal-03167771, version 1

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Nathalie Quiniou, Alice Cadero, Michel Marcon, Ludovic Brossard. Simuler avec le modèle bioclimatique ThermiPig les performances des porcs en croissance en tenant compte des conditions climatiques et des caractéristiques de la salle d’engraissement. 53. Journées de la Recherche Porcine, Ifip; Inrae, Feb 2021, En ligne, France. ⟨hal-03167771⟩

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