Ácido benzóico e óleos essenciais como alternativa aos promotores de crescimento para frangos de corte

Abstract

In the last 50 years the antibiotic growth promoters have been used in feed to improve the performance and prevent diseases in broilers. However, due to several discussions about the possibility of bacterial resistance induction and to the international limitations of meat purchase from countries where these promoters are used, some alternative products has been searched in order to substitute those ones. This study aimed to evaluate the addition of CRINA® Poutry Plus (CPP), a blend of benzoic acid and essential oil compounds, in broiler diets and its action as an alternative to antibiotic growth promoters. One thousand five hundred fifty one-day old Cobb 500 males were used in a randomly assigned in 5 treatments with 10 replicate pens of 31 birds each. The diets were: NC-without growth promoters; PC-with 10 ppm of Avilamycin (AVI); CPPD-with 300 ppm of CPP from 1-42 days; AVI(1-21d)/CPP(22-42d)- with 10 ppm AVI from 1–21 days and 300 ppm of CPP from 22-42d and AVI+CPP(1-42d) -with 10 ppm AVI and 300 ppm of CPP from 1-42d. All the diets had the same nutrient levels. The data were submitted to ANOVA and Tukey’s test. At 42 days the NC group had lower (P=0.0001) body weight than others treatments, and CPPD had better weight than PC. CPPD diet increased (P<0.001) body weight gain in 1- 42d period compared to birds fed on NC diet and PC diet. In relation to NC, all other groups showed better feed conversion rate (P<0.001) on 1-42 period and European Productive Efficiency Index (P<0.001). Birds fed with CPPD, AVI(1-21d)/CPP(22-42d) and AVI+CPP(1-42d) presented higher average daily gain than birds fed with NC and PC diets. The NC birds showed lower result in gut lenght (P=0.022) than PC and AVI + CPP(1-42d). The lesion scores by E. acervulina was highest in the NC (P=0.005) and other treatments didn’t show significant differences. For E. maxima and E. tenella, no significant differences were found. The results suggest that CRINA® Poutry Plus can be used as an alternative product to antibiotic growth promoters in broiler diets without losses in productive performance.