Abstract

In Brazilian conditions of bovines creation in semi-extensive and essentially extensive systems, the animals present irregular performance depending on the time of year. During the waters station, that is, the rainy season, the animals perform better; notwithstanding, during dry rain-scarce periods, meat and milk production declines sharply, animals lose weight and the growth rhythm of steers and heifers is reduced. This occurs at the expense of the surplus or lack of forage in the pasture that the animals have access to. Ruminants, thanks to the physiological particularities of their gastrointestinal tract, can synthesize a good part of the vitamins they need, nonetheless, are summarily dependents on the intake of minerals to maintenance the production and good development osseous, muscular etc. The mineralization or supplementation of cattle herds is an zootechnical practice of extreme importance from a practical and economic perspective, since if longs of to maximize animal productivity. Given this context, takes on is that the correct formulation of mineral salt or multiple mixtures containing scarce minerals in roughage or concentrates is extremely important, since correct supplementation aims to increase fertility, improve the herd's feeding efficiency and prevent the manifestation of diseases related to mineral deficiency. Keywords: Supplementation, Minerals, Multiple mixture, Requirements, Cattle.