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Apports croissants en tryptophane dans un aliment pauvre en protéines sur les performances des porcs en croissance

Abstract : The effects of tryptophan (Trp) supplementation were investigated in growing pigs (n = 100 from 40 to 100 kg) fed ad libitum in a context of a reduction of the crude protein (CP) level. A control diet with a CP content close to the standard level (NP; 16.5%) was compared to four low CP diets (LP; 13.7%) gradually supplemented with L-Trp (0, 0.3, 0.6 and 0.9 g/kg for LP0, LP1, LP2 and LP3, respectively). All the diets were formulated to contain similar net energy (9.9 MJ/kg) and standardized ileal digestible (SID) lysine (Lys; 0.81%) contents. The actual SID Trp:Lys ratios were 22, 17, 20, 23 and 27% for NP, LP0, LP1, LP2, and LP3 diets, respectively. Growth performance decreased when pigs were fed a low CP diet without L-Trp supplementation (LP0 vs. NP, -160 g/d; P < 0.05). The average daily gain of pigs fed the LP1 diets was similar to that obtained with NP treatment (958 vs. 989 g/d; P > 0.05). Similar growth performances were measured in LP1, LP2 and LP3 groups. In our experimental conditions, the SID Trp:Lys ratio in growing pigs fed a low CP diet has to be at least 20% to optimize the growth performance.
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  • PRODINRA : 348205

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David Renaudeau, Etienne Corrent, Yvan Primot, Aude Simongiovanni, Mario Giorgi, et al.. Apports croissants en tryptophane dans un aliment pauvre en protéines sur les performances des porcs en croissance. 48. Journées de la Recherche Porcine, Feb 2016, Paris, France. IFIP - Institut du Porc, Journées de la Recherche Porcine en France, 2016, 48èmes Journées de la Recherche Porcine. ⟨hal-02739765⟩

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