PSVIII-1 Hy-D Increases Ca, P and Serum Metabolites Related to Growth in Grazing Animals Receiving a P Deficient Supplement

Abstract The aim with this trial was to evaluate the effects of 25-OH Vit D3 in serum metabolites growing grazing Nellore young bulls during rainy season two different supplementary P levels. Two independent and sequential trials were performed: first one using a 250 g/kg CP supplement containing 8 P, second same 25% supplement, no addition P. In each trial, eighteen 385 kg BW 18 months age randomly assigned treatments (n=9 animals/treatment): or not (control) (ROVIMIX Hy-D 1.25%, Hy-D) supplement. Animals placed paddock B. brizantha, cv. Marandú, equipped electronic feeders that provided individual access (animal/treatment). On day 31 blood samples taken for determination D3, IGF-1, Ca, Alkaline Phosphatase (ALP), osteocalcin (OCa). data analyzed according complete randomized design. (8 supplement) use (Control vs increased concentrations (25.8 30.0 ng/mL, P< 0.03); affecting others variables. when added (25.4 44.7 0.01); Ca (10.8 11.3 mg/dL, 0.07); (7.4 8.3 0.08); ALP (205 263 U/L, 0.04); IGF-1 (256 327 did affect OCa (P< 0.27). These results showed positive on metabolism could be dependent dietary level, being able maintain levels related growth supplied