Níveis de cálcio e de fósforo em dieta para codornas japonesas de 26 a 38 semanas de idade

• Ano de defesa: 2009
• Autor(a) principal: Vieira, Danilo Vargas Gonçalves
• Orientador(a): Barreto, Sérgio Luiz de Toledo
• Banca de defesa: Donzele, Rita Flávia Miranda de Oliveira , Vargas Júnior, José Geraldo de , Gomes, Paulo Cezar
• 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: Desempenho produtivo; Minerais; Qualidade de ovos
• Palavras-chave em Inglês: Production performance; Minerals; Egg quality
• Área do conhecimento CNPq: CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL::EXIGENCIAS NUTRICIONAIS DOS ANIMAIS
• Link de acesso: http://locus.ufv.br/handle/123456789/5608

This research was conducted at the Poultry Department of Animal Science, Federal University of Viçosa, aiming to evaluate the performance and mineral deposition in the tibia of Japanese quail fed diets containing different levels of calcium and available phosphorus. The experiment was conducted in a completely randomized in factorial scheme 4x3, with twelve treatments and seven replicates and eight birds per experimental unit. Diets were isonitrogenous (19.3%), isocaloric (2800 kcal ME/kg) and isoaminoacídics. There was a significant interaction only for the intake and calcium intake. Significant quadratic and linear levels of available phosphorus on the consumption of diet and calcium in diets containing 2.0 and 2.5% calcium, respectively. No significant effect of available phosphorus levels was observed in diet containing 3.0% calcium. The feed conversion by egg mass and production of commercial eggs, were influenced by the level of available phosphorus in the diet linearly. For the quality parameters of eggs, there was a linear increase of weight and percentage of bark and linear reduction in weight and percentage yolk depending on the levels of dietary calcium and for the specific weight, increased levels of calcium diet improvement provided in linear and increasing levels of available phosphorus, linear reduction of specific weight. For the mineral deposition in the tibia of quail, there was significant interaction between levels of available calcium-phosphorus diet on phosphorus and ash in the tibia. There was a linear increase in the levels of available phosphorus on the phosphorus content in the tibia of chicks fed a diet containing 3.0% calcium and linear and quadratic effect on the ash content in tibia of broilers fed diets containing 2.5 and 3.0% calcium, respectively. For the calcium content in the tibia, there was increased even with increased levels of available phosphorus in the diet, in a linear fashion. The other parameters were not influenced by levels of calcium and available phosphorus in diets. Diets containing levels of 2.0% calcium and 0.10% available phosphorus, corresponding to a daily intake of 555.4 mg of calcium and 27.07 mg of phosphorus available in the bird meets the requirements of these minerals to obtain satisfactory performance and egg quality of Japanese quails from 26 to 38 weeks of age.