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Objective. To evaluate the effect over the daily weight gain (DWG) and feed consumption (FC) caused by supplementing with commercial feed, on lactating calves and its economic impact in a cattle ranching company managed under a double purpose cattle system. Materials and methods. Fourteen calves were supplemented (6 males and 8 females) between 3 and 5 months old, with commercial balanced feed at 1.5% of live weight (Treatment 1) and they were compared to an equal in sex group which was not supplemented (control Treatment), for 113 days, during rainy season. The data for DWG and FC were statistically analyzed through a t Student test. The cost-benefit relationship and profitability were determined. Results. The DWG of the lactating calves was significantly affected by the supplementation with commercial feed (p 0.05), or the consumption of the commercial feed (p>0.05), within each treatment, thus explaining the statistical non-difference in DWG among genders. The economical analysis confirmed that the feeding strategy is viable when there is a relation B: C of 1.1 and a trimester profitability of 9.27%. Conclusions. Supplementing lactating cattle calves is a reasonable practice that allows gaining additional profit.

Suplementación con balanceado comercial en crías vacunas lactantes bajo sistema doble propósito