Óleo Essencial de Canela (Cinnamomum verum) e Orégano (Origanum vulgare) em Dietas de Frangos de Corte

Abstract

The search for a replacement for the growth-promoting antibiotic (APC) is of great scientific and commercial interest. Being essential oils (OE), a promising substitute, due to the antimicrobial effects, helping several beneficial actions that help to achieve maximum productive performance. The objective of this study is to evaluate the action of cinnamon oil and oregano in association in the diet of broiler chickens and their influence on biochemical parameters, biometry of the digestive system, biochemical profile of the liver, histomorphometry of the small intestine and microbiome analysis of the small intestine. In this experiment 385 day-old male Cobb chicks housed in cages were used. The experimental design was completely randomized, with five treatments and seven replications of 11 animals each. The treatments will consist of control ration, a positive control with antibiotics and the other treatments with increasing levels of essential oil in 0.050; 0.100 and 0.150 kg / t. The results were subjected to analysis of variance and polynomial regression analysis, at 5% probability and Dunnet's test as a positive control construct. The microbiome analysis performed a test of main components. Significant results were obtained for performance on the 21st and 42th days and on the histomorphometry of the villi in the small intestine. In the main component test, 2 groups were formed, one corresponding to the control treatments and the levels of 1.0 and 1.5 with a predominance of Lactobacillus sp. and another for the treatment of 0.05 with predominance of Enterococcus sp. Being the majority group of lactobacillus, it can be divided into 2, due to the presence of Clostridium ruminococcus in treatments with OE and its absence in control treatments. It is concluded that essential oil can be recommended as a substitute for the promoting antibiotic, as it does not show harmful changes, improves productive characteristics and preserves the intestinal microflora with beneficial bacteria