Fifty-six pigs(average initial weight of 28.47 kg) were assigned to a randomized blocks design,in a factorial scheme 4 x 2 (levels of dicalcium phosphate substitution x sex)with four repplicates for males and three for females, with two animals perexperimental unit, to evaluate the effects of replacement levels of phosphatedicalcium by phosphate monodicalcium on the performance, blood and bone parametersof swine fed during the growing (30 to 60 kg) and finishing (60 to 90 kg) phases.Corn and soybean meal based -diets with phosphorus supplemented with replacementlevels of 33.33, 66.67 and 100% of phosphate dicalcium (FBC) by monodicalcium(MBC) were formulated based on the values of total phosphorus, i.e., isophosphoric(0.56 and 0.42% in the growth and finishing phases, respectively). The levelsof substitution of FBC for MBC did not influence the performance, absolute andrelative weight of the kidneys and liver, carcass yield and blood parameters.However, a linear decrease was observed in the ash, phosphorus and calcium contentsof the bones and a lineal increase in the thickness of the compact layer andin the layer compact/periosteal relationship of the bones with the substitutionof FBC by MBC. It was conclude that during the growth and finishing phases thetotal and/or partial substitution of phosphate dicalcium by monodicalcium doesnot influence the performance of the animals.
