Uso de Laurento de Nandrolona como Estimulante de Crecimiento en Cerdas en las Etapas de Crecimiento y Engorde

Abstract

In the Angahuana Bajo Community belonging to Santa Rosa, Ambato Canton, Tungurahua Province, the effect of nandrolone laurate as a growing stimulant in York x Landrace sows was investigated in the growing and fattening states against a control treatment, under a completely at random design. The animals used in the two treatments were fed on Commercial fattening feed with 16% raw protein and 1500 kcal of ED/kg MS (DM) with a daily ration of 2 kg and Commercial fattening feed with 14% raw protein and 2500 kcal of ED/kg DM with a daily feed ration of 2.5 kg. The sows treated with nandrolone laurate received a dosage of 1mg / kg live weight, with 30-day intervals and a total of 4 applications over a 120-day experimentation period. The sows treated with nandrolone laurate at the end of the fattening stage reached the highest productive averages as to final weight and weight gain with averages of 111.23 and 48.00 kg as well as the best feeding conversion with an index of 2.29, showing the first oestrous at 164 days, while the control treatment sows showet it two weeks later. It is therefore recommended to use nandrolone laurate in sows in the growing and fattening stages because it has proved to de efficient in terms of production, since the animals can reach a higher weight in less time and produce with a significant money saving.