True ileal phosphorus digestibility of monocalcium phosphate, monodicalcium phosphate and dicalcium phosphate for broiler chickens

•The true ileal P digestibility of MCP, MDCP and DCP for broiler chickens was determined using the regression method.•The digestibility of P from two inorganic sources (MCP and MDCP) and one organic source (DCP) were 64.6, 60.2 and 69.3%, respectively.•The determined digestibility of P were lower than the values of available P currently assumed in poultry feed formulations.