Efeito da inoculação do butirato de sódio in ovo sobre eclodibilidade, morfometria do jejuno e no desempenho inicial de frangos de corte

Abstract

The search for a digestive effectiveness of neonatal causes the birds in eggs supplemental organic acids may be an alternative for an intestinal maturation and increased early weight gain. This study aimed to evaluate the effects of sodium butyrate administration in ovo on hatchability, zootechnical and morphometric aspects of broiler chickens. Therefore, we used 900 eggs arrays of Cobb-500 strain at 36 weeks of age. The project was developed in two stages, the first being the incubation period and the second the initial phase of creation. Incubation was conducted in hatchery Mauricea Food in single stage. Upon the transfer on day 18, the eggs with viable embryos were inoculated with the vaccine and the treatments were: Group 1 - vaccinated egg; Group 2 - immunized egg plus 0.3 ml of sterile water (placebo); Group 3 - egg vaccinated plus 0.3 ml of solution containing 8,0 mg Sodium butyrate at 98% (Sigma-Aldrich). Obtained 89.33% hatching for the control group, 97% hatched for the placebo group and 94.7% in the group consisting of embryos inoculated with 8,0 mg of sodium butyrate. For the evaluation of performance, mixed 360 birds were housed in experimental boxes at the Experimental Station of Small Animal of the UFRPE. The group that received butyrate showed the best result in feed conversion than the others and a lower feed intake, and present a greater feed efficiency and increased absolute weight. Each week until the birds have completed 14 days of age, four animals per experimental plot were weighed, then were euthanized by cervical dislocation, which were collected jejunum fragments. Supplementation in eggs stimulated growth of the heights of the villi of the jejunum, with more significant results for the group receiving butyrate and demonstrating its greatest effect until 7 days old.