Desempenho de frangos de corte alimentados com dietas contendo antibiótico e/ou fitoterápico como promotores, adicionados isoladamente ou associados

Abstract

This study was aimed at evaluating the efficacy of a phytoterapic and na antibiotic, added isolated or associated to the feed of broilers from 1 to 42 days of age). In this experiment were used 320 day old chicks COBB 500, distributed in 4 treatments as follow: T1= Avilamicyn + Aviance (50% +50%); T2= Avilamycin (100%); T3= Aviance (100%) and T4= without promoter. The experimental design was entirely randomized, with 4 treatments with 4 replicates of 20 chicks each. Feed comsumption, body weight and feed conversion were evaluated at the end of each experimental period. Mortality and IEP were analized only at the end of the trial. The results showed that there is no positive effect on broilers performance receiving growth promoters. However, there was higher mortality in tratments wich did not receive any growth promoter wich was responsible for any efficiency productive index lower than those with these products.