Digestibilidade ileal verdadeira do f?sforo de ingredientes de origem animal para frangos de corte

• Ano de defesa: 2019
• Autor(a) principal: Sousa, Felipe Dilelis de Resende
• Orientador(a): Lima, Cristina Amorim Ribeiro de
• Banca de defesa: Lima, Cristina Amorim Ribeiro de , Vieites, Flavio Medeiros , Lima, Marcos Fabio de , Cardoso, Ver?nica da Silva
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal Rural do Rio de Janeiro
• Programa de Pós-Graduação: Programa de P?s-Gradua??o em Zootecnia
• Departamento: Instituto de Zootecnia
• País: Brasil
• Palavras-chave em Português: Farinha de carne e ossos; Farinha de peixes; Farinha de v?sceras; F?sforo digest?vel
• Palavras-chave em Inglês: Digestible phosphorus; Fish meal; Meat and bone meal; Poultry by-product meal
• Área do conhecimento CNPq: Zootecnia
• Link de acesso: https://tede.ufrrj.br/jspui/handle/jspui/5095

The objective of this study was to determine the true ileal phosphorus digestibility (CdviP) of animal by-product meals. As such, three trials were conducted. In the first trial the fish meal CdviP was evaluated by direct method, substitution method and regression method. Six semipurified experimental diets were formulated, and titanium dioxide was added in 3g / kg in all diets as indigestible marker. 252 chickens were housed in metabolic cages, and the six experimental diets were distributed in a completely randomized design, in 6 treatments and 6 replicates of 7 birds each. The birds received the experimental diets for 3 days, from 19 to 22 days of age. At the 22st day of age the birds were euthanized for the collection of ileal content. Excreta and diets were analyzed for titanium, dry matter and phosphorus. Endogenous losses with the semi-purified diet were determined at 128.7 mg / kg MSi. By the regression method the estimated endogenous loss was negative. The CdviP determined by the direct, substitution and regression methods, respectively, were 0.4549 0.5168 and 0.2546. There was significant difference between the regression method and the substitution method. In the second test, the objective was to determine the CdviP of three different meat and bone meal (MBM1, MBM2 e MBM3) using the direct method. 252 chickens were housed in metabolic cages, and the diets were distributed in a completely randomized design, in 4 treatments and 9 replicates of 7 birds each. In the direct method, the test ingredient is the only source of phosphorus in the diet, so it is assumed that the digestibility of the diet is the digestibility of the test ingredient. The endogenous losses with the semi-purified diet were determined at 94.9 mg / kg MSi. The true ileal digestibility coefficient of the phosphorus for the MBM1, MBM2 and MBM3 were 0.6495, 0.4928 and 0.68858. MBM1 and MBM3 had similar digestibilities, which were higher than MBM2 digestibility. In the third assay the CdviP of three different poultry byproduct meal (PBP1, PBM2 and PBM3) were determined. 189 chickens were housed in metabolic cages, and diets were distributed in a completely randomized design, in 3 treatments and 9 replicates of 7 birds each. The true ileal digestibility coefficient of phosphorus for PBM1, PBM2 and PBM3 was 0.9599, 0.9606 and 0.9339, respectively. The direct method shown as the most practical way to determine phosphorus digestibility of animal byproduct meal. While fishmeal and meat and bone meal are poorly available in poultry phosphorus due to their low digestibility, the evaluated viscera meal is highly digestible in phosphorus. Studies that allow the evaluation of the digestibility of the ingredients are allowed to generate a more reliable database, which allows the application of diets in digestible phosphorus to be reproduced.