Evaluation of corn ethanol coproducts on broilers diets

• Ano de defesa: 2023
• Autor(a) principal: Dias, Kelly Morais Maia
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: eng
• Instituição de defesa: Universidade Federal de Viçosa; Zootecnia
• Palavras-chave em Português: Frangos de corte - Alimentação e rações; Frangos de corte - Registros de desempenho; Nutrição e Alimentação Animal
• Link de acesso: https://locus.ufv.br//handle/123456789/30936; https://doi.org/10.47328/ufvbbt.2023.093

Experiment 1 aimed to determine nitrogen-corrected apparent metabolizable energy (AMEn) and standardized ileal amino acid digestibility (SIAAD) of two corn ethanol coproducts: high-protein distillers’ dried grains (HP-DDG) and corn bran with solubles (CBS). The results showed that AMEn values for HP-DDG and CBS were 3,334 kcal/kg and 2,083 kcal/kg on DM basis, respectively. Concerning the HP-DDG, the digestibility trial resulted in the following SIAAD coefficients and values, respectively: 80.33% and 1.09 for Lys, 85.95% and 1.44 for Met + Cys, 75.58% and 1.24 for Thr, 89.58% and 1.66 for Arg, 84.91% and 1.08 for His, 86.37% and 1.35 for Ile, 90.64% and 4.56 for Leu, 85.76% and 1.80 for Val, and 88.67% and 1.90 for Phe. The digestibility average of HP-DDG is 85.83% for essential amino acids. Concerning the CBS, the following SIAAD coefficients and values were measured, respectively: 79.29% and 0.44 for Lys, 89.57% and 0.31 for Met + Cys, 78.89% and 0.40 for Thr, 92.28% and 0.66 for Arg, 87.48% and 0.36 for His, 93.40% and 0.35 for Ile, 92.27% and 1.01 for Leu, 90.97% and 0.51 for Val, and 88.81% and 0.45 for Phe. The digestibility average of CBS is 88.45% for essential amino acids. Experiment 2 aimed to evaluate the inclusion of HP- DDG in broilers’ diets. 1200 Cobb500™ one-day-old male chicks were randomly distributed into 6 treatments with 10 replicates with 20 birds each. The experimental period was divided into three phases: 1) starter, 0 to 21 days old; 2) grower, 22 to 33 days old; and 3) finisher, 34 to 43 days old. The treatments consisted of 6 different inclusion levels of HP-DDG in each phase, respectively: T1) 0% in the starter, grower, and finisher; T2) 3%, 5%, and 7% in the starter, grower, and finisher; T3) 5%, 7%, and 9% in the starter, grower, and finisher; T4) 7%, 9%, and 11% in the starter, grower, and finisher; T5) 9%, 11%, and 13% in the starter, grower, and finisher; and T6) 11%, 13%, and 15% in the starter, grower, and finisher. Body weight (BW), BW gain (BWG), feed intake (FI), and feed conversion ratio (FCR) were measured at 21, 33, and 43 days old. In addition, carcass and cut yields were assessed at 43 days old. Data were submitted to ANOVA and analyzed using Dunnett’s Test at 0.05 significance level. Birds fed 11% in the starter phase had lower BW (P = 0.032) and BWG (P = 0.029) than the control group, whereas in the finisher phase, birds fed 7 and 9% had lower BWG than control (P < 0.005). Overall performance (0 to 43 days) showed no response to the replacement (P > 0.05). Carcass and cut yields were not affected by replacing soybean meal for HP-DDG (P > 0.05). Therefore, the recommended level for replacement in the starter phase is up to 9%, whereas in the finisher phase is 11, 13, or 15%. Increasing levels according to the rearing phase does not affect overall performance. Keywords: HP-DDG. Broilers. Performance. Amino acids digestibility. Metabolizable energy.