Effect of metabolizable energy levels and feeding programs on carcass quality and performance in broilers slaugthered lately - DOI: 10.4025/actascianimsci.v29i1.250

• Autor(a) principal: Duarte, Karina Ferreira
• Data de Publicação: 2007
• Outros Autores: Junqueira, Otto Mack, Filardi, Rosemeire da Silva, Laurentiz, Antonio Carlos de, Souza, Hirasilva Borba Alves de, Oliveira, Tricia Maria Ferreira de Souza
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Acta Scientiarum. Animal Sciences (Online)
• Texto Completo: https://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/250
• topic: aminoácidos digestíveis; análise sensorial; energia metabolizável; frangos de corte; qualidade de carne; 5 5.04.00.00-2 Zootecnia

This experiment was conducted to evaluate the use of different energy levels and amino acid recommendations on carcass and meat quality of broilers from 42 to 57 days of age. It was used 1,600 one-day old male broilers (Cobb) in a completely randomized design arranged in a factorial scheme 2x4 with 3,200 and 3,600 kcal ME kg-1 and four different feed programs. The experimental period was from 42 to 57 days of age. From 1 to 41 days of age all birds received the same diets based on corn and soybean meal. Data from carcass yield (output carcass, relation weight breast and thigh and overthigh with the carcass weight) and muscle quality (color, pH, cooking weight loss, shearing force, water holding capacity and sensorial analysis) and data from performance (weight gain, feed intake, feed:gain ratio and energy conversion) were evaluated. The energy levels and different feed programs did not determine differences on carcass meet quality to justify the choice of amino acid levels and need to consider the energy levels and amino acid recommendations to determine the best cost-benefit. It was observed that 3,600 kcal ME kg-1 resulted in some improvement on performance, and the partition of digestible amino acid requirements during two periods resulted in worst performance.