Measurement of true ileal phosphorus digestibility in meat and bone meal for broiler chickens

Abstract

An experiment was conducted to estimate true ileal phosphorus (P:) digestibility of 3 meat and bone meal samples (MBM-1, MBM-2: , and MBM-3:) for broiler chickens. Four semipurified diets were formulated from each sample to contain graded concentrations of P. The experiment was conducted as a completely randomized design with 6 replicates (6 birds per replicate) per dietary treatment. A total of 432 Ross 308 broilers were assigned at 21 d of age to the 12 test diets. The apparent ileal digestibility coefficient of P was determined by the indicator method, and the linear regression method was used to determine the true P digestibility coefficient. The apparent ileal digestibility coefficient of P in birds fed diets containing MBM-1 and MBM-2 was unaffected by increasing dietary concentrations of P (P > 0.05). The apparent ileal digestibility coefficient of P in birds fed the MBM-3 diets decreased with increasing P concentrations (linear, P < 0.001; quadratic, P < 0. 01). In birds fed the MBM-1 and MBM-2 diets, ileal endogenous P losses were estimated to be 0.049 and 0.142 g/kg DM intake (DMI:), respectively. In birds fed the MBM-3 diets, endogenous P loss was estimated to be negative (-0.370 g/kg DMI). True ileal P digestibility of MBM-1, MBM-2, and MBM-3 was determined to be 0.693, 0.608, and 0.420, respectively. True ileal P digestibility coefficients determined for MBM-1 and MBM-2 were similar (P < 0.05), but were higher (P < 0.05) than that for MBM-3. Total P and true digestible P contents of MBM-1, MBM-2, and MBM-3 were determined to be 37.5 and 26.0; 60.2 and 36.6; and 59.8 and 25.1 g/kg, respectively, on an as-fed basis.

Phosphorus digestibility and bioavailability in soybean meal, spray-dried plasma protein, and meat and bone meal determined using different methods

“…The SBM diets 1 to 3 also yielded higher excreta P retention values of 49 to 63% than the MBM diets 7 to 9 (32–39%). The apparent ileal P digestibility values for MBM of 66 to 79% are slightly higher than values from the study by Mutucumarana et al. (2015a) who reported apparent ileal P digestibility values for 3 samples of MBM ranging from 49 to 69%.…”

“…The results of the latter study and the present study are in contrast to several earlier growth/bone ash studies that concluded that the P in animal products are highly or totally available for poultry ( Waldroup et al., 1965 ; NRC, 1994 ; Sell and Jeffrey, 1996 ). Thus, the results of Experiment 1 of the present study, Dilger and Adeola (2006) , and Mutucumarana et al. (2015a) suggest that SBM, a plant-based feed ingredient, has apparent P digestibility equal to or higher than that of MBM, an animal by-product, when using a prececal or ileal P digestibility assay.…”

“…The MBM herein yielded the lowest apparent ileal P digestibility value at 42%. Mutucumarana et al. (2015a) reported apparent ileal P digestibility of 3 MBM samples to vary from 49 to 69% among diets.…”

“…The results of the latter study indicated that there were significant differences among stations for P digestibility of the same SBM sample. Mutucumarana et al. (2015a , b) used a prececal or ileal digestibility method to estimate true ileal P digestibility in several ingredients using a regression method where ileal P output was regressed on dietary P content.…”

Farinha De Carne E Ossos E Butirato De Sódio Sobre O Desempenho Semanal De Frangos De Corte

“…Geralmente são fonte de proteína de alta qualidade e digestibilidade que podem auxiliar no balanço de aminoácidos exigidos pelos animais, além de excelentes fontes de fósforo disponível e outros minerais. Entretanto, apresentam grande variabilidade em sua composição nutricional (HENDRIKS et al, 2002;MUTUCUMARANA et al, 2015), são potencialmente suscetíveis á oxidação (NOLLET; TOLDRÁ, 2011) e à contaminação microbiana (DAVIES;HINTON, 2000;SAPKOTA et al, 2007). As preocupações com a presença de microrganismos nas farinhas não se restringem aos danos causados aos animais, mas aos impactos dessas contaminações na saúde humana (SAPKOTA et al, 2007).…”