Evaluation of phosphorus levels in bones and serum of buffaloes (Bubalus bubalis) before and after supplementation with a selective mineral mixture

This study aimed to evaluate phosphorus (P) concentration in serum and bone, the percentage of ash and the specific bone density of buffaloes on Ilha de Marajo before and after mineral supplementation. For this study, 14 crossbred buffaloes of Murrah and Mediterranean descent aged between 18 and 36 months were used. The average values of P before supplementation in serum and bone, the percentage of bone ash and the specific bone density were 5.68mg/dL +/- 1.18, 16.53%+/- 0.53, 59.95%+/- 1.96 and 1.52g/cm3 +/- 0.32, respectively, which demonstrated P deficiency in animals raised on Ilha de Marajo. After supplementation with P for a period of seven months, the values were 6.61mg/dL +/- 0.87, 16.90%+/- 0.56 and 60.30%+/- 0.95 and 1.71g/cm3 +/- 0.21, respectively. These results showed a significant increase in P concentration in blood serum, specific bone density and percentage of P in ash (P<0.05), but there was no significant increase in the percentage of ash. The average increase in P in the serum and ash did not reach normal levels in all animals; however, 28.6% of the animals had normal values of P in serum and 50% in the ash, and 64.3% had normal specific bone density values. The nonre-establishment, in some of the animals, of the variables of P serum and bone after supplementation for seven months may have occurred as a result of the low intake of the mineral mixture and by the low concentration of P in the Brachiaria brizantha cv. Marandu used for feeding animals during the experiment.