Simulation Models are tools that can be used to reduce time and cost of field experimentation. The PAMPA CORTE model was developed to simulate the growing beef cattle in a dynamic and mechanistic way. Two individual animal sub-models are considered. The first simulates the ingestion and digestion of food and predicts the daily productions of the amount of metabolic energy and digestible protein. The second considers these productions to simulate the changes of live weight of the animal. In this research, the results of the simulations from the model were compared with the data obtained from the field experiment. The Hereford x Nelore crossbreed was supplemented from after weaning to slaughtering at 14 months old. Three simulations were made to compare the real data with the simulated data from the model. The simulation results from the PAMPA CORTE model showed a great performance in the simulation of the gaining of crossbred males supplemented in natural pasture.
computer system; beef cattle; digestion model; live weight gain
