The objective was to evaluate the effect of sodium lasalocid supplementation in the productive characteristics and economics in Blackbelly sheep in growth. It was used 11 male of 5 months old, randomly distributed in two groups that fed with agro-industrial residues that was added sodium alkaloid (LS) in one treatment. It was used two treatments T1 (without LS) and T2 (whit 60mg LS / kg). Feed intake (kg), weight gain (kg), height gain (cm) and carcass yield (%) was evaluated in each animal. It was used the multivariate analysis of variance of a completely randomized design with covariance for the variables feed consumption, weight gain, feed conversion and height increase. To evaluate of carcass yield it was used a completely randomized design with covariance. The results obtained in each treatment (T1 vs. T2) were: food consumption (63,85 vs. 63,97), weight gain (12,91 vs. 13,33), feed...