Banca de DEFESA: FELIPE DILELIS DE RESENDE SOUSA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : FELIPE DILELIS DE RESENDE SOUSA
DATA : 03/09/2019
HORA: 08:30
LOCAL: INSTITUTO DE ZOOTECNIA DA UFRRJ
TÍTULO:

True ileal phosphorus digestibility in animal by-products meal for broilers. 

PALAVRAS-CHAVES:

Digestible phosphorus. Fish meal. Meat and bone meal. Poultry by-product meal.

PÁGINAS: 82
GRANDE ÁREA: Ciências Agrárias
ÁREA: Zootecnia
SUBÁREA: Produção Animal
RESUMO:

The objective of this study was to determine the true ileal phosphorus digestibility (CdivP) of animal by-product meals. As such, three trials were conducted. In the first trial the fish meal CdivP was evaluated by direct method, substitution method and regression method. Six semi-purified 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 18 to 21 days of age. At the 21st 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 CdivP 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 CdivP 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 CdivP of three different poultry by-product 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.

MEMBROS DA BANCA:
Presidente - 387738 - CRISTINA AMORIM RIBEIRO DE LIMA
Externo ao Programa - 387286 - FERNANDO AUGUSTO CURVELLO
Interno - 037.683.227-42 - FLÁVIO MEDEIROS VIEITES - UFJF
Externo à Instituição - MARCOS FÁBIO DE LIMA - IFRJ
Externo à Instituição - VERONICA DA SILVA CARDOSO - UFRJ