Engorde de Novillos Brahman Mestizo Bajo Sistema de Pastoreo y Suplementación Mineral, con la Adición de dos Anabólicos Comerciales

Abstract

On the farm “ Will of God”, located in Santo Domingo de los Tsáchilas province fattening crossbred steers Brahman under grazing system and mineral supplementation, with the addition of two anabolic implants, Trembolone acetate+ 17-β Estradiol vs Zeranol compared with a control group measurements distributed under a completely randomized design variables in 120 days of investigation was evaluated. Then highest gain of total daily weight was 66.50 kg and 554.00 g respectively by using implants of Trembolone acetate + 17-β Estradiol, establishing the most efficient parameters in feeding conversion and cost/kg with averages of 15.45 and 1.06 USD. On the other hand the best profit of breeds are found on treated animals with Trembolone acetate +17-β Estradiol with a benefit- cost of 1.32 USD, that is for each dollar with the use of this anabolic in crossbred steers the profit is 0.32 USD. It is recommended to use Trembolone acetate +17-β Estradiol, in fattening Brahman crossbred steers, because of this research work found satisfactory results evaluated in different evaluated productive parameters.