Comparative study of two methionine sources on performance of broilers from 1 to 34 days of age | Efecto de la dl-metionina y la hidroxi-análoga de la dl-metionina sobre la productividad en pollos de engorde
2011
Jiménez Moreno, E., Universidad Politécnica de Madrid (España). Dept. de Producción Animal | Frikha, M., Universidad Politécnica de Madrid (España). Dept. de Producción Animal | Lázaro, R.P., Universidad Politécnica de Madrid (España). Dept. de Producción Animal | Dapoza, C. | Mateos, G.G., Universidad Politécnica de Madrid (España). Dept. de Producción Animal
We compared DL-Methionine (DL-Met) and the liquid hydroxyanalogue form (MHA-FA) as a source of Methionine (Met) in broiler diets from 1 to 34 d of age. The experimental design was completely at random with 9 treatments; a control diet without Met supplementation, 4 extra diets that included 0.30, 0.60, 1.00 and 1.50 g DL-Met source (99% Met)/kg and 4 diets that included 0.30, 0.60, 1.00, y 1.50 g MHA-FA source (88% Met)/kg diet. Diets were based on wheat, corn, peas, and soybean meal. All the feeds met the requirements of broilers for all indispensable amino acids except Met. The Met content was 3.1 g/kg for the control diet and ranged (g/kg) from 3.4 to 4.9, 2.9 to 3.4, and 2.6 to 4.1 g/kg diet for starter, grower and finisher periods, respectively. Diets were offered as 2.5-mm pellets. Each treatment was replicated 10 times and the experimental unit was a cage with 8 chicks. Body weight and ADFI were recorded per replicate at 1, 13, 26, and 34 d of age. For the entire experimental period, the inclusion of Met, irrespective of the source of Met used, improved BW gain (P <= 0.001), ADFI (P <= 0.001), and feed to gain ratio (P <= 0.001). The inclusion of DL-Met provided better broiler growth than the inclusion of MHA-FA. The relative efficacy of MHA-FA with respect to DL-Met in a weight to weight basis was estimated to be 71 and 51% for BW and FCR, respectively.
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