In vitro evaluation of different phosphates as phosphorus source for poultry feeding

Five different phosphates namely calcium hydrogen phosphate (CHP), diammonium phosphate (DAP), dicalcium phosphate (DCP), potassium dihydrogen phosphate (PHP) and single super phosphate (SSP) had been evaluated by in-vitro solubility test to predict their bioavailability value (BY) using different solvents such as 2.0% citric acid (CA), 0.4% hydrochloric acid (HCl), neutral ammonium citrate (NAC) and water. The in-vitro phosphorus (P) solubility of different phosphates revealed that the PHP-had a highr P solubility value (92.99%) followed by SSP (83.04%) and DAP (81.62%) and the lower P solubility was observed in DCP (56.97%) and CHP (50.80%). Amongst various solvents used, the 2.0% CA solubilized higher P (84.60%) followed by 0.4% HCI (79.76%), NAC (69.71%) and lower P solubilization was observed in water (58.27%).