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Previous issue date: 2017 === Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) === Objetivou-se com este trabalho avaliar o desempenho de codornas de corte alimentadas com farinha de penas e protease nas dietas durante as fases de oito a 21 e de oito a 35 dias de idade. A an?lise dos dados seguiram a seguinte forma: primeiro utilizou-se 360 codornas distribuidas em delineamento inteiramente casualizado (DIC), totalizando em nove tratamentos, quatro repeti??es de 10 aves por parcela. Os tratamentos experimentais foram: T1: Controle positivo (CP) + 0% farinha de penas (FP); T2: CP + 5% FP; T3: CP + 10% FP; T4: Controle negativo (CN), com redu??o de 8% proteina bruta (PB) e amino?cidos em rela??o ao CP + 0% FP; T5: CN + 5% FP; T6: CN + 10% FP; T7: CN + 0% FP + protease; T8: CN + 5% FP + protease e T9: CN + 10% FP + protease. Para o segundo utilizou-se 240 codornas distribu?das em DIC, em esquema fatorial 2 x 3 (duas dietas (CP e CN) x tr?s n?veis de farinha de penas (FP)), totalizando em seis tratamentos, quatro repeti??es de 10 aves por parcela. Os tratamentos experimentais foram: T1: CP + 0% FP; T2: CP + 5% FP; T3: CP + 10% FP; T4: CN + 0% FP; T5: CN + 5% FP e T6: CN + 10% FP. E para o terceiro utilizou-se 240 codornas distribu?das em DIC, em esquema fatorial 2 x 3 (duas inclus?es da enzima (com e sem) x 3 n?veis de FP), totalizando em seis tratamentos, quatro repeti??es de 10 aves por parcela. Os tratamentos experimentais foram: T1: Ra??o reduzida (RD) em 8% da exig?ncia de PB e amino?cidos + 0% FP; T2: RD + 5% FP; T3: RD + 10% FP; T4: RD + 0% FP + protease; T5: RD + 5% FP + protease e T6: RD + 10% FP + protease. As vari?veis de desempenho avaliadas foram: o consumo de ra??o, o ganho de peso e a convers?o alimentar. Aos 35 dias de idade avaliou-se o peso vivo e o rendimento de carca?a, de cortes nobres (peito e coxa+sobrecoxa) e an?lise de rentabilidade econ?mica. As inclus?es crescentes da FP nas ra??es ocasiona redu??o do desempenho das codornas nas duas fases em estudo, entretanto, pode ser utilizada nas ra??es em 5% sem preju?zo ao desempenho. A utiliza??o da enzima protease (caracter?stica de serina) n?o proporciona melhoria no desempenho das aves e n?o contrubui para melhor digest?o da FP, havendo necessidade de estudos utilizando a enzima queratinase. A protease adicionada em ra??es com redu??o de PB e amino?cidos, contendo FP n?o melhora o desempenho das aves. Ra??es reduzidas em PB e amino?cidos n?o apresenta-se como boa estrat?gia para melhorar o desempenho das codornas. A an?lise de rentabilidade econ?mica revela que ra??es controle positivo com 0 e 5% de FP apresentam melhor ?ndice. === Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017. === The objective of this study was to evaluate the performance of meat-type quail fed with feather meal and protease in the diets during the phases of the eight to 21 days and eight to 35 days of age. Data were analyzed as follows: firstly, 360 quails distributed in a completely randomized design (CRD) were used with a total of nine treatments, four replicates of 10 birds per plot. The experimental treatments were: T1: Positive control (PC) + 0% feather meal (FM); T2: PC + 5% FM; T3: PC + 10% FM; T4: Negative control (NC), with reduction of 8% crude protein (CP) and amino acids in relation to PC + 0% FM; T5: NC + 5% FM; T6: NC + 10% FM; T7: CN + 0% FM + protease; T8: NC + 5% FM + protease and T9: NC + 10% FM + protease. For the second, 240 quails distributed in CRD were used, in a 2 x 3 factorial scheme (two diets (CP and NC) x three levels of feather meal (FM)) with a total of six treatments, four replicates of 10 birds per plot. The experimental treatments were: T1: CP + 0% FM; T2: CP + 5% FM; T3: CP + 10% FM; T4: CN + 0% FM; T5: CN + 5% FM and T6: CN + 10% FM. Finally, for the third experiment, 240 quails distributed in CRD were used, in a 2 x 3 factorial scheme (two enzyme inclusions (with and without) x three FM levels) with a total of six treatments, four replicates of 10 birds per plot. The experimental treatments were: T1: Reduced ration (RD) in 8% of the requirement of CP and amino acids + 0% FM; T2: RD + 5% FM; T3: RD + 10% FM; T4: RD + 0% FM + protease; T5: RD + 5% FM + protease and T6: RD + 10% FM + protease. The performance variables evaluated were: feed intake, weight gain and feed conversion. At 35 days of age, live weight and carcass yield were evaluated, from noble cuts (breast and thigh + drumstick), and analysis of economic profitability. Increasing inclusion of FM in feed causes a reduction in the performance of quails in the two phases under study, however, it can be used in rations in 5% without compromising performance. The use of the protease enzyme (serine characteristic) does not improve the performance of the birds and does not contribute to a better digestion of FM, requiring studies using the enzyme keratinase. Protease added in diets with reduced CP and amino acids, containing FM does not improve poultry performance. Reduced CP and amino acid rations do not present as a good strategy to improve quail performance. The economic profitability analysis reveals that positive control rations with 0 and 5% PF present a better index.
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