Utilização das vitaminas C e E na ração de frangos de corte mantidos em ambiente de alta temperatura

• Ano de defesa: 2007
• Autor(a) principal: Souza, Marcos Gonçalves de
• Orientador(a): Donzele, Rita Flávia Miranda de Oliveira
• Banca de defesa: Albino, Luiz Fernando Teixeira , Abreu, Márvio Lobão Teixeira de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Mestrado em Zootecnia
• Departamento: Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul
• País: BR
• Palavras-chave em Português: Estresse térmico; Desempenho; Nutrientes funcionais
• Palavras-chave em Inglês: Thermal stress; Performance; Functional nutrients
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL
• Link de acesso: http://locus.ufv.br/handle/123456789/5557

The experiment was carried out to evaluate the effects of vitamins C and E supplementation on ration over performance, carcass traits and hematologics parameters of broilers kept on high temperature environments from 1 to 42 days of age. A total of 450 Cobb line males were used (initial weight 44.1 ± 2.19 g), randomly assigned on 5 treatments: T1 basal diet (BD) without supplementation of vitamins C and E; T2 BD with 300 ppm of vitamin E; T3 BD with 230 ppm of vitamin C; T4 BD with 300 ppm of vitamin E and 230 ppm of vitamin C; T5 BD with 150 ppm of vitamin E and 115 ppm of vitamin C and nine repetitions. The experiment was divided in two phases from 1 to 21 and from 22 to 42 days of age, with ten and seven birds by repetition, in each phase. Treatments did not influence (P>0.05) the performance on birds at phase from 1 to 21 days. At phase from 1 to 42 days, weight gain and feed consumption were not influenced (P>0.05) by the treatments, however, feed conversion (FC) was affected (P<0.05), where birds which received rations with 300 ppm of vitamin E supplementation (T2) or with 300 ppm of vitamin E supplementation associated to 230 ppm of vitamin C (T4) presented similar CA values between them and better related to birds that received ration only with 230 ppm of vitamin C (T3). Birds from treatments 1 and 5 presented intermediary FC values that did not vary from the others. There was no effect (P>0.05) on treatments over absolute and relative weights of carcass, drumstick and thigh on birds at 42 days of age. Absolute and relative weight of breast were influenced (P<0.05) by the different treatments, where better results were observed on treatments 4 and 5 respectively. No effect was observed (P>0.05) on treatments over spleen on birds at 21 and 42 days of age. Treatments did not influenced (P>0.05) hematologic parameters of birds at 21 and 42 days of age. It can be concluded that supplementation of vitamins C and E does not affects performance, noble cuts yield (drumstick and thigh), spleen weight and blood parameters of broilers kept in high temperature environment in the period from 1 to 42 days of age. The combination of the levels of vitamins C and E, on 300 ppm of vitamin E + 230 ppm of vitamin C or 150 ppm of vitamin E + 115 ppm of vitamin C results improvements on absolute and relative breast weight respectively.