Uso de dietas a base de milho ou sorgo e cantaxantina sobre o desempenho de matrizes de corte e suas progênies

• Ano de defesa: 2014
• Autor(a) principal: Vivas, Carlos Eduardo Bonilla
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; Brasil; Zootecnia; UFSM; Programa de Pós-Graduação em Zootecnia; Centro de Ciências Rurais
• Palavras-chave em Português: Carotenoides; Taxa de postura; Qualidade do ovo; TBARS; Carotenoids; Laying rate; Egg quality; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA
• Link de acesso: http://repositorio.ufsm.br/handle/1/21303

An experiment was carried out at Poultry Science Laboratory – LAVIC at the Federal University of Santa Maria – UFSM. To evaluate the productive and reproductive performance of broiler breeders fed with corn or sorghum diets supplemented or not with canthaxanthin. 440 females and 60 males Cobb 500 were used and distributed in a completely randomized design in a factorial arrangement (2x2), with two ingredients; corn (CO) and sorghum (SO), and two leves of canthaxanthin supplementation, 6mg/kg (CX) and 0mg/kg (NCX), totalizing 4 diets with 5 pens with 22 females and 3 males each one. The experimental period was splitted in periods, the first from 42 to 53, the second from 54 to 65 wks of age and in a total period.The offspring performance was evaluated in 2 avaliations from 1 to 21 days. It was used 320 males chicks of 1 day each one. They came from 54 and 64 wks of age of broiler breeders. The design was the same used in the broiler breeders study, totalizing 4 treatments with 10 pens of 8 male each one. The laying rate was affected by the CX supplementation at the second period. The egg specify gravity was better in egg yolks came from SO+CX and SO+NCX than CO+CX in the first period, but the egg weight was better in SO+CX than CO+CX and the same period. At the second period the egg weight was better in CO+NCX and SO+CX than CO+CX. The fertility and incubation parameters, the eggs were not influenced by the diets in the total period. CX in diets had the highest deposition of carotenoids, therefore, the best pigmentation on the egg yolk. The lowest level of the thiobarbituric acid reactive substances (TBARS) was found in SO+CX. The vitelline membrane strength registered an incremented to break it in egg yolks came from SO. CO had the best lutein and zeaxanthin concentrations, but no to CX in the egg yolk. The concentrations of saturated and monounsaturated fatty acids were the highest in CO diets, but, polyunsaturated fatty acids were the best in SO diets. The supplementation of CX in diets reduced mortality offspring at 64 wks of age. The supplementation of canthaxanthin in diet and the use of sorghum in the poultry feed represents a great opportunity for next researches.