Temperatura ambiente e idade do frango de corte sobre o valor energético do milho
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Data
2021-05-05
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Universidade Federal de Goiás
Resumo
This study aimed to assess the effects of environmental
temperature and age of broilers on the energy value of corn.
A total of 288 Cobb 500 chicks were distributed in a complete
randomized design with a split-plot arrangement and six
replications of six chicks each. The main plot consisted of threetemperatures (cold: 18 °C; thermoneutral: 25 °C; and hot: 33 °C), while
the secondary plot consisted of age (initial: 11 to 14 days; growing:
25 to 28 days; and final: 39 to 42 days). The basal diet was based on
corn and soybean meal. The test diet was produced by replacing the
basal diet for test food: 40% corn + 60% basal diet. The mean values of
AMEn observed for broiler chicks under cold, thermoneutral, and hot
temperatures were 3322, 3279, and 3233 kcal/kg of natural matter,
respectively, and 3215, 3218, and 3400 kcal/ kg of natural matter
for the initial, growing, and final phases, respectively. Overall, the
metabolizable energy values of corn and the balance and coefficients
of metabolizability of nutrients in the test diet increased with the
broiler age, but the true metabolizable energies of corn were not
affected by environmental temperature. The balance and coefficients
of metabolizability of nutrients in the test diet decreased due to heat
exposure during the growing and final phases.
Descrição
Palavras-chave
Balanço de nitrogênio, Energia metabolizável, Estresse por calor, Estresse por frio, Metabilizabilidade de nutrientes, Nitrogen balance, Metabolizable energy, Heat stress, Cold stress, Metabolizability of nutrients
Citação
CARVALHO, Fabyola Barros; SATORI, José Roberto; PEZZATO, Antonio Celso; FASCINA, Vitor Barbosa; CASTELO, Pedro Gibim; SOUZA, Ivan Mailinch Gonçalves Pereira de. Temperatura ambiente e idade do frango de corte sobre o valor energético do milho. Ciência Animal Brasileira, Goiânia, v. 22, n. 1, e-65526, 2021. Disponível em: https://revistas.ufg.br/vet/article/view/65526. Acesso em: 6 out. 2022.