Utilização de complexo enzimático em dietas de poedeiras

• Ano de defesa: 2013
• Autor(a) principal: Luiz Felipe Pinho Pereira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: Metabolizabilidade de nutrientes; Qualidade dos ovos; Poedeiras; Enzimas exógenas; Desempenho; Ovos Qualidade; Dieta em veterinaria; Ave poedeira Alimentação e rações; Enzimas
• Link de acesso: http://hdl.handle.net/1843/BUOS-9ADHX5

Two experiments were conducted to evaluate the effects of inclusion of an enzyme complex, with and without its nutritional value in diets of laying hens Hy-line w-36® on productivity performance, quality of eggs produced and metabolizability of nutrients. The productivity performance experiment was conducted between 27 and 36 weeks of age of birds and the quality of eggs produced, evaluated at 36 weeks. The metabolizability of nutrients essay was conducted at 32 weeks of age birds. The experimental designs were completely randomized in a factorial 2x2, (with or without the inclusion of the enzyme complex, with and without its nutritional value). The treatments were: The treatments were: A- Control Diet: diet without addition of enzyme complex and its valuation; B- Positive Control Diet: diet with enzyme complex and its valuation; C-"On Top" Diet: diet with enzyme complex, without its valuation; D-Negative Control Diet: diet without enzyme supplementation, with its valuation. There was no significant differences (p> 0.05) between treatments for productivity performance (initial and final weight of the birds, egg production, feed intake, feed conversion per dozen egg, egg weight and feed conversion per egg kilogram), egg quality (Haugh unit, yolk percentage, albumen and shell, egg specific gravity, shell thickness and strength of the shell) and metabolizability of nutrients (metabolizability coefficient of dry matter, nitrogen, ether extract, matter mineral, calcium and phosphor). To shell strength there was effect of valorization, getting the eggs from diets not valued higher resistance (p0.05). Nutritional changes determined by valuation or not the enzyme complex were not sufficient to influence the results of productivity performance, egg quality (except for shell strength) and metabolizability coefficients of nutrients in laying hens. It was concluded that diet with lowest nutritional level was sufficient for maintenance and productivity of the birds.