RT article T1 Evaluation of Phosphorus Digestibility from Monocalcium and Dicalcium Phosphate Sources and Comparison between Total Tract and Prececal Digestibility Standard Methods in Broilers A1 Cambra-López, María A1 Moset, Verónica A1 López, María del Carmen A1 Mesa, Juan Sebastián A1 Carpintero, Laura A1 Donadeu, Andrés A1 Dupuy, Javier A1 Macías-Vidal, Judit A1 Cerisuelo, Alba A1 Ferrer, Pablo A1 Pascual, Juan J. K1 Mineral nutrition K1 L51 Animal physiology - Nutrition K1 L01 Animal husbandry K1 Poultry K1 Nutrient availability AB The objective of this study was to compare the total tract (total excreta and marker) and prececal methodologies to determine phosphorus (P) digestibility and to evaluate its variation as a function of the physicochemical characteristics of the inorganic phosphate used (monocalcium, MCP and dicalcium, DCP) from different commercial sources. A total of 176 1-day-old male broilers were used in two digestibility experiments. In Experiment 1, one MCP and one DCP were incorporated in the basal diet at two levels. In Experiment 2, MCP and DCP from three commercial sources were incorporated to the basal diet at one level. Physicochemical characteristics of inorganic phosphates were examined, as well. Additionally, bone mineralization and growth performance traits were investigated in both trials. The digestibility of MCP ranged from 75.2 to 87.4% and from 80.5 to 86.6% for DCP amongst methodologies, but differences between total tract and preceal methodologies were not statistically significant. Particle size, surface area, degree of crystallinity and impurities varied amongst commercial sources. The P digestibility of the three tested commercial sources of MCP was 79.6% (MCP1), 70.2% (MCP2) and 65.6% (MCP3); p > 0.05. The P digestibility of the 3 tested commercial sources of DCP was 80.1% (DCP1), 77.4% (DCP2) and 71.4% (DCP3); p > 0.05. PB MDPI SN 2076-2615 YR 2021 FD 2021 LK http://hdl.handle.net/20.500.11939/7860 UL http://hdl.handle.net/20.500.11939/7860 LA en NO Cambra-López, M., Moset, V., López, M. M., Sebastián Mesa, J., Carpintero, L., Donadeu, A. et al. (2021). Evaluation of Phosphorus Digestibility from Monocalcium and Dicalcium Phosphate Sources and Comparison between Total Tract and Prececal Digestibility Standard Methods in Broilers. Animals, 11(12), 3427. DS MINDS@UW RD Aug 19, 2022