"Utilización de tres Niveles de Enramicina en la Fase de Cría Desarrollo y Levante en Pollitas Lohmann Brown"

Abstract

At the Escuela Superior Politécnica de Chimborazo, the effect of different enramine levels (control, 3,5 and 7 mg / Kg) was investigated in egg laying Lohmann Brown hen feeding, at the raising, development and ready-to leave stages evaluating different variables during 18 weeks experimentation with one-dy-old chickens and using a completely at random design. Among the principal results it was determined that the best productive indexes during the raising stage were recorded with the 5 mg / Kg feed treatment with a weight at six weeks of 481.52 g. while the control obtained a lower yield with a mean of 469.12 g. During the growth stage, the best yields were found with the 7 mg / Kg feed level with a weight gain of 591.68 g. which does not differ significantly from the 5 mg / Kg feed treatment of 585.84 g respectively. At the ready-to leave stage the best productive yields were 3 mg / Kg feed with a weight gain of 453 g which does not differ significantly from the 5 mg / Kg feed of 446.76 g. The highest benefit-cost index was obtained with the use of 7 mg / Kg feed with 1.22 USD. The best productive behavior after evaluating the different study variables was obtained with 5 mg / Kg feed; this is why its use is recommended in the feeding of Lohmann Brown replacement chickens