Avaliação do efeito de probióticos sobre o desempenho de frangos de corte

Abstract

The present work aimed to evaluate the productive performance of broiler chickens supplemented with probiotics. For this purpose, 400 unsexed, one-day-old chicks were used. from the commercial cobb lineage. The experimental design was completely randomized, with 2 treatments, the first being control (T1) and the second with probiotic supplementation (T2). Each treatment consisted of 4 replications of 50 birds, totaling 200 birds per treatment. Statistical analyzes were carried out using the R studio statistical package, calculating the average, standard deviation and coefficient of variation. To test the hypotheses, analysis of variance was used. (ANOVA), considering treatment as the only variation factor. And for the qualitative factor, the means were compared using the Tukey test, with a significance level of 5%. The probiotic used contained multiple probiotic strains (Lactobacillus plantarum, Lactobacillus delbrueckii subsp. bulgaricus, Lactobacillus acidophilus, Lactobacillus rhamnosus, Bifidobacterium bifidum, Streptococcus salvarius subsp. thermophilus, Enterococcus faecium) quantified and indicated for administration in different species, including meat birds. To the end of the experiment all productive parameters evaluated, feed consumption, average weight, feed conversion, mortality rate and production efficiency index showed differences significant statistics (p<0.05) at the end of the study between the two treatments, with the treatment that included probiotic supplementation, which showed better results excepting, however, the average daily weight gain which, despite having shown visibly favorable for probiotic treatment, there was no significance statistics throughout the entire creation period. The results of this research lead to the conclusion that the use of probiotics contributes positively to the performance of broiler chickens, culminating in significant improvements in the various parameters indicated above. These results suggest that the inclusion of probiotics in the diet of broiler chickens can constitute an effective practice to optimize the productive performance and health of birds resulting in benefits from both an economic and animal welfare point of view(TRADUÇÃO NOSSA)