The objective of this experiment was to evaluate four phosphorus (P) sources on finishing pigs perfomance from 60 to 100kg weight, considering their available phosphorus. Thirty two castrated male crossbred pigs, were randomly distributed in four treatments with four replications with two animals each. The rations used were isoproteic and isocaloric and the P sources were added to complete 100% of the available P pig requirements, according to the P biological value, previously determined. The P sources were: bicalcium phosphate standard (BPS), triple superphosphate (TSP), monoammonium phosphate (MAP) and the association between 20% Patos de Minas rock phosphate (PMP) and 80% BPS. The parameters analyzed by SNK test were: weight gain, feed consumption, feed conversion and fluorine consumption. Only weight gain and feed consumption were significantly different (P<0,05) amongst the treatments. TSP treatment showed the lowest values of weight gain and feed consumption. The fluorine consumption was significantly different amongst the treatments. Lower fluorine consumption was observed in MAP and BPS, while it was highest with PMP and TSP treatments. The use of available phosphorus values appear to be appropriate for diet calculation. The phosphorus sources tested could be used on finishing swine feeding, with emphasis in the association between PMP with better quality phosphate.
Pig; phosphorus biological availability; phosphorus sources
