Exigência de fósforo disponível para frangos de corte machos e fêmeas mantendo a relação cálcio : fósforo disponível em 2:1

• Ano de defesa: 2010
• Autor(a) principal: Mello, Heloisa Helena de Carvalho
• Orientador(a): Gomes, Paulo Cezar
• Banca de defesa: Sá, Luciano Moraes , Pinto, Rogerio
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Viçosa
• Programa de Pós-Graduação: Doutorado em Zootecnia
• Departamento: Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul
• País: BR
• Palavras-chave em Português: Frangos de corte; Exigência; Fósforo disponível
• Palavras-chave em Inglês: Broilers; Requirement; Available phosphorus
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL
• Link de acesso: http://locus.ufv.br/handle/123456789/1742

Eight experiments were conducted at the Universidade Federal de Viçosa, to determine the requirement of available phosphorus (aP) of males and females broiler chicks from 1 to 10, 11 to 21, 22 to 33 and 34 to 46 days of age, keeping the calcium: available phosphorus ratio equal to 2:1. In each experiment, 480 broilers were randomly allotted in a completely randomized design with 6 treatments, 8 replicates and 10 birds for floor pen. In the 1º experiment (1 to 10 days of age) for both males and females, levels of Ca and aP for each treatment were respectively 0.40 and 0.20, 0.54 and 0.27, 0.68 and 0.34, 0.82 and 0.41, 0.96 and 0.48 and 1.10 and 0.55%. In the 2º experiment (11 to 21 days old) for both males and females, levels of Ca and aP for each treatment were respectively 0.38 and 0.19, 0.52 and 0.26, 0.66 and 0.33, 0.80 and 0.40, 0.94 and 0.47, 1.08 and 0.54%. In the 3º experiment (22 to 33 days) for both males and females, levels of Ca and P for each treatment were respectively 0.36 and 0.18, 0.50 and 0.25, 0.64 and 0.32, 0.78 and 0.39, 0.92 and 0.46, 1.06 and 0.53%. In the 4º experiment (34 to 46 days), for both males and females levels of Ca and P for each treatment were respectively 0.34 and 0.17, 0.48 and 0.24, 0.62 and 0.31, 0.76 and 0.38, 0.90 and 0.45, 1.04and 0.52%. The experimental diets were formulated using corn and soybean meal and the available phosphorus was considered 33% of total phosphorus. The parameters evaluated were weight gain, feed intake, feed conversion ratio and tibia ash, calcium and phosphorus content on tibia. For males broiler chicks males with 1 to 10, 11 to 21, 22 to 33 and 34 to 46 days old the levels of available phosphorus and calcium recommended are 0.482 and 0.964%, 0.410 and 0.820%, 0.395 and 0.790%, 0.319 % and 0.638%. For females broiler chocks with 1 to 10, 11 to 21, 22- to 33 and 34 to 46 days old the levels of available phosphorus and calcium recommended are 0.459 and 0.918%, 0.388 and 0.776%, 0.358 and 0.716%, 0.256 % and 0,512%.