The coefficients of apparent (CADP) and true (CTDP) digestibility of phosphorus of eleven plant feed of vegetal origins commonly used in swine feeds were determined in this research. Seventy eight crossbred barrows were distributed to completely randomized experimental design, with a factorial arrangement 2 × 2 × 13 (methodology × phase × treatment) with three replicates per treatment. The digestibility coefficients were evaluated by using simultaneously both methodologies, total fecal collection and fecal marker (Cr2O3), in two production periods, growing and finishing phases, using 36 pigs in each period, with average weight of 25 ± 3 and 60 ± 5 kg, respectively. The digestibility coefficients of 11 feeds, a reference diet and low phosphorus (0.03%) diet were determined to estimate the phosphorus endogenous losses in the two phases. The average values of CADP and CTDP observed with pigs in the growing and finishing phases were: 45.01 and 68.32% for corn; 31.3 and 66.97% for sorghum; 31.84 and 41.31% for corn gluten feed (22% CP); 38.28 and 53.20% for corn gluten meal (60% CP); 32.42 and 40.61% for cottonseed meal (30% CP); 37.50 and 43.95% for cottonseed meal (40% CP); 50.76 and 55.74% for wheat bran and middlings; 38.75 and 52.19% for soybean meal; 33.61 and 41.21% for soybean protein concentrate; 41.67 and 55.81% for soybean full fat extruded; and 56.84 and 66.56% for yeast from alcohol distillery. There was not difference between the phosphorus digestibility coefficients obtained by the total fecal collection and the fecal marker methodologies. Pigs in the finishing phase showed higher CADP and CTDP of the feeds than those obtained with growing pigs.
chromic oxide; digestible phosphorus; total fecal collection
