Níveis de energia metabolizável em rações pré-iniciais para frangos de corte
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Data
2008
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Resumo
This experiment was carried out to evaluate the dietary metabolizable energy levels for broilers in the preinitial
growth phase. A total of 280 Avian × Cobb one day old chicks was allotted to warm cages as a completely randomized
design with five treatments (2,850, 2,950, 3,000, 3,050, and 3,150 kcal/kg of ME in the diet) and four replicates of 14 birds
per experimental unit. Bird weight and diet and orts weights were measured at 1, 4, 7, 10, 14, 18 and 21days old and the
performance characteristics determined (average weight gain, feed intake, feed-to-gain ratio) from 1 to 7 and 1 to 21 days.
A digestibility assay was performed during the first week between the 4th and 7th days. The results showed that the evaluated
ME levels influenced the performance of the birds from 1 to 21 days old, however, the lowest level of ME resulted in worst
DM digestibility values. The lowest levels, 2,850 kcal ME/kg, provided better broiler performance, while the 3,115 kcal
ME/kg provided better DM digestibility in corn-soybean based diets.
Descrição
Palavras-chave
Desempenho, Digestibilidade, Morfometria digestiva, Retenção de nutrientes, Digestibility, Digestive organs dimension, Nutrient retention, Performance
Citação
XAVIER, Suzany Aparecida Gomes; STRINGHINI, José Henrique; BRITO, Alexandre Barbosa de; ANDRADE, Maria Auxiliadora; LEANDRO, Nadja Susana Mogyca; CAFÉ, Marcos Barcellos. Níveis de energia metabolizável em rações pré-iniciais para frangos de corte. Revista Brasileira de Zootecnia, Viçosa, v. 37, n. 1, p. 109-115, 2008.