Evaluation of hoof sole zinc concentration of dairy cow with and without foot lesions, suplemented or not with drought yeast from sugarcane

摘要

> size="2" face="Verdana, Arial, Helvetica, sans-serif">With the goal of studying the hoof sole zinc concentrations of cow with and without foot lesions, suplemented or not with dried yeast from sugarcane; 60 cows were chosen from milking of 150 animals. Four groups of 15 animals were formed being the first one of animals with foot lesions and with supplemental yeast, the second one of animals with lesions and without supplemental yeast, the third group of animals without foot lesions and with supplemental yeast and the fourth one of animals without foot lesions and without supplemental yeast. Hoof sole zinc was determined by the Atomic Absortion Spectrophotometry (AAS). The results were statistically evaluated by analysis of variable, followed by Tukey’s test to compare mean levels. The mean concentration of zinc in the hoof sole of the groups statistically, significant showed differences only in the animals with foot lesions and with yeast supplementation.