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Levels of methionine lysine and metabolizable energy in finishing rations for broiler chickens



Levels of methionine lysine and metabolizable energy in finishing rations for broiler chickens



Revista da Sociedade Brasileira de Zootecnia 14(2): 159-166



Two trials were run with the objective of determining the effect of methionine and lysine supplementation and two energy levels on 43 to 56 day old broilers performance. A 16 crude protein (CP) diet was used with two metabolizable energy (ME) levels, 3.000 and 3.200 kcal ME/kg, with two methionine levels (0.00 and 0.12%) and two lysine levels (0.00 and 0.15%) of supplementation in a 2 .times. 2 .times. 2 (energy levels .times. methionine level .times. lysine level) factorial arrangement. Two 20% CP control diets were used with and without 0.24% methionine supplementation. The first experiment was run using males and the second using females. According with the results it was concluded that: 1. Birds feed diets containing 3.200 kcal ME/kg showed similar weight gain and better feed conversion as compared with birds feed diets with 3.000 kcal ME/kg. 2. Diets containing 16% CP with either 3.200 or 3.000 kcal ME/kg, when feed to males, should be supplemented with methionine and lysine in order to optain optimum feed conversion. 3. To obtain optimum weight gain with males, diets containing 20% C and 3.200 kcal ME/kg should be supplemented with methionine. 4. Females feed 6% CP dists showed improved performance with methionine supplementation but did not with lysine supplementation.

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Accession: 005806195

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