PSIX-17 - Use of mycotoxin Deactivator Increases Productive Performance by Feedlot Cattle Fed a Natural Contaminated Diet

Abstract: Our objective was to evaluate the effect of including a mycotoxin deactivator on the productive performance of feedlot cattle for 96 days, fed a high concentrate diet. Nellore bulls (iBW, n = 48; 402 kg ±5.02 kg), were allocated in a collective pen with automatic troughs (Intergado, Brazil), randomly distributed in two treatments: 1) Control (CON), with no mycotoxin deactivator; 2) Mycofix Select 5.0 (Myc, Biomin, DSM Nutritional Products, 10g per animal/day). The animals were weighed fasting (±16h) at the beginning and end of the experiment and dry matter intake (DMI) was measured by electronic feeders (Intergado). The diets were analyzed for the presence of naturally occurring mycotoxins by enzyme immunosorbent test, Elisa – AgriQuant (Romer Labs) and the detected results were: Total aflatoxins (AF) < 2.0 μg/kg DM, fumonisins (B1+B2) 0.29 mg/kg DM, deoxynivalenol (DON) 0.38 mg/kg DM and trichotocenes (< 0.25 μg/ kg DM). Data were analyzed by SAS PROC ANOVA for p < 0.05. The MyC provision increased the final BW (561 vs 545 kg, P=0.0465), ADG (1.66 vs 1.50 kg/d, P=0.0458), HWC (317 vs 308 kg, P=0.0492) and the average daily gain in carcass (1.15 vs 1.05 kg/d, P=0.0455) with no effect on DM intake. The use of Mycofix Select 5.0 provided better performance and greater carcass production in Nellore cattle confined with a high concentrate diet with a natural presence of mycotoxins.