EVALUATION OF ORGANIC SALTS ON THE PERFORMANCE OF DAIRY CROSSBRED MILKING COWS AND GROWING ANIMALS ON PASTURE

The use of additives in ruminant diets has occurred more intensely recent years to increase animalperformance, through changes the ruminal microbiota. Thus, this study aimed evaluate: 1) Isomix (Iso)and virginiamycin (Vir) concentrate, a 2x2 factorial (without and with 30 g Isomix/cow/day; without 210mg virginiamycin/cow/day), on productive performance mixed cows pasture; 2) multiplesupplement Isomix/animal/day), pasture growing dairy mixedanimals; 3) at an increasing level 30, 60 or 90 Isomix/cow/day),on crossbred wet season. work was conducted Fazenda BoaVista, district Cachoeira de Santa Cruz, Viçosa, MG, belonging Federal University Viçosa. In experiment 1,there no significant effect concentrate milk production producing 13.4 kg milk/dayin tropical during season, research nutritional parameters were required underthese conditions. 2, there body weight gain, therefore, additivein multiple supplements is recommended improve cattle depending thecost-benefit ratio supplementation. 3, onmilk 6.8 milk/day, presence calves milking, wetseason, but tendency fat, protein lactose contents Isomix, being possible benefitfrom that additive.