The coefficients of apparent (CADP) and true (CTDP) digestibility of the phosphorus from animal origin feedstuffs were determined. Twenty-four barrows in growing phase with initial weight 25.0±3.0kg and the same barrows in finishing phase with initial weight 60.0±5.0kg were used. The treatments were made by a factorial of two methodologies (total collection of feces and fecal marker), two phases (growing and finishing), and eight diets (six animal origin feedstuffs, one reference diet, and one diet with low content of total phosphorus in order to estimate the losses of endogenous phosphorus), with three replicates by treatment. There was no difference between the methodologies or phases evaluated (P>0.05). The average of CADP and CTDP found in growing and finishing phases were, respectively, 61.7 and 62.0% for 35% crude protein (CP) meat and bone meal; 62.3 and 62.9% for 41% CP meat and bone meal; 49.0 and 52.5% for feather and poultry by-products meal; 72.3 and 90.8% for feather meal; 85.5 and 88.5% for 55% CP fish meal; and 80.0 and 92.0% for powder milk whey.
swine; chromic oxide; digestible phosphorus; total fecal collection
