Con el fin de observar el uso del Lasalocid Sódico (LS) al 15% en Ia ceba de bovinos en pastoreo, se llevó a cabo este ensayo en una finca del municipio de Cumaral (Meta), situada a una altura de 600 m.s.n.m. y con una temperatura media de 26°C. Se utilizaron 40 bovinos machos cruzados de cebú x criollo, de 30 meses de edad y un peso promedio de 291 kg, distribuidos en dos grupos al azar y mantenidos en pastoreo continuo en una pradera con pasto Brachiaria decumbens y humidicola. El periodo experimental comprendió 119 días y Ia dosificación para el grupo de animales tratados (T2) tue de 200 mg de LS/animal/día. Los animales tratados (12) alcanzaron una ganancia diana de peso promedio de 7.81% a su favor, comparad con el grupo testigo (T1). Los resultados obtenidos permiten sugerir el uso de LS al 15% en Ia ceba de bovinos en pastoreo, como alternativa de importancia económica para Ia industria ganadera.The present work was made to investigate the use of Lasalocid Sodium 15% on the fattening beef cattle on pasture. The experiment was conducted in a farm located in Cumaral town, department of Meta, with 600 m.a.l.s. and 26°C mean temperature. All time the animals were mainteined in an continous pasture on an praire with Brwhi,uii decuinbens and hum/dice/a pasture ground. Forty cattle males brahaman X criollo, 30 months old with 219 kg average weight were used and distribuited in two treatments of twenty animals per treatment. The experimental work had a duration of 119 days and each group of animals treated (T2) recived 200 mg/animal/day of LS 15%. The results of this experiment indicate that the animals treated (T2) obtained a daily average weight of 7.81% more, compared with the control group (T1), and that LS 15% can be used in the fattening of beef cattle on pasture as an alternative for economic importance in the cattle industry.Ganado de doble propósito-Ganaderia doble proposit
