Effects of dietary crude protein level and meal frequency on energy utilization in growing pigs
2001
Bellego, L. le | Noblet, J. | Milgen, J. van (Institut National de la Recherche Agronomique, Saint-Gilles (France). Centre de Rennes)
Three trials were conducted with 60 kg growing pigs. In trial 1, four diets ranging in CP level between 18.9 and 12.3 per cent were used, whereas in trials 2 and 3, two diets with 17.4 and 13.9 per cent CP were used. In trials 1 and 2, the feed was given as 4 meals per day whereas in trial 3, 2 frequencies (2 and 7 meals per day) were compared. The results show that decreasing the CP content allows a reduction of nitrogen excretion by 40 (trials 2 and 3) or 60 per cent (trial 1), without affecting the nitrogen retention. This reduction in nitrogen excretion was accompanied by both a reduction in urinary energy losses and of heat production equivalent to 3.5 and 7 kJ per gram decrease in protein intake, respectively. Meal frequency (trial 3) had no effect on nitrogen and energy utilization
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