Efeito dos níveis energéticos em dietas isoprotéicas sobre o desempenho, taxa metabólica e hormônios tireoideanos em frangos
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Data
1999
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Resumo
A study was conducted on the effects of three dietary energy levels (2 600, 2 900, and 3 200 Kcal EM/kg) in isoproteinic diets for broiler chicks, on the productive performance, plasma thyroid hormone (T4 and T3) levels and metabolic rate, determined at 28 and 49 days of age and at environmental temperatures of 15ºC, 25ºC, and 35ºC. Birds fed the highest energy level showed the most rapid weight gain and greater feed intake. Metabolic rate was dependent on ambient temperature and age of the birds, but not on the dietary energy level. No correlation was observed between plasma thyroid hormone concentration and energy intake.
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Ganho de peso, Energia, Frangos de corte, Hormônios tireoideanos, Taxa metabólica, Broilers, Energy, Metabolic rate, Thyroid hormones, Weight gain
Citação
JUNQUEIRA, Otto Mack; LEANDRO, Nadja Susana Mogyca; MARCARI, Marcos; ARAÚJO, Lúcio Francelino; ARAÚJO, Cristiane Soares da Silva. Efeito dos níveis energéticos em dietas isoprotéicas sobre o desempenho, taxa metabólica e hormônios tireoideanos em frangos. Archivos Latinoamericanos de Produção Animal, San Juan, v. 7, n. 1, p. 125-132, 1999.