2022-10-072022-10-072021-05-05CARVALHO, 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.e - 1809-6891http://repositorio.bc.ufg.br/handle/ri/21449This 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.porAcesso AbertoBalanço de nitrogênioEnergia metabolizávelEstresse por calorEstresse por frioMetabilizabilidade de nutrientesNitrogen balanceMetabolizable energyHeat stressCold stressMetabolizability of nutrientsArtigo10.1590/1809-6891v22e-65526