Energy and lysine for broilers from 44 to 55 days of age
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Data
2005-12
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Resumo
An experiment was conducted to evaluate the performance and
carcass yield of broilers at 55 days of age fed diets with different levels
of metabolizable energy and lysine. Evaluated data of performance were
weight gain, feed intake, energy intake, lysine intake, caloric conversion
and feed conversion. Carcass assessment was performed based on data
from carcass yield, breast weight, whole wings, whole legs, back, head
+ neck, feet and abdominal fat. A 3 x 3 factorial arrangement was
used, with 3 levels of metabolizable energy (3,200; 3,400 and 3,600
kcal ME/kg) and 3 lysine levels (0.95%; 1.05% and 1.15%). There was
no interaction between the two factors. Nevertheless, increasing levels
of metabolizable energy improved weight gain (745 g; 841 g and 910 g,
respectively) and feed intake was higher in broilers receiving the diets
with 3,200 and 3,600 kcal ME/kg. Overall performance was not affected
by lysine levels. Feed conversion values were 2.69, 2.42 and 2.14 for
birds fed diets with 3,200; 3,400 and 3,600 kcal ME/kg, respectively.
Carcass yield and breast weight increased with higher levels of energy
and lysine in the diets.
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Palavras-chave
Broilers, Lysine, Metabolizable energy, Performance
Citação
ARAÚJO, L. F.; JUNQUEIRA, O. M.; ARAÚJO, C. S. S.; FARIA, D. E.; STRINGHINI, J. H. Energy and lysine for broilers from 44 to 55 days of age. Revista Brasileira de Ciência Avícola, Campinas, v. 7, n. 4, p. 237-241, Oct./Dec. 2005.