Parâmetros histomorfométricos do intestino delgado em frangos de corte alimentados com rações contendo diferentes fontes de sorgo e concentrações de tanino

Abstract

Sorghum is increasingly being used for animal feed replacing corn, due to their similar nutritional characteristics, but with a lower cost. However one factor that negatively influences the nutritional value of sorghum is the presence of tannin that is an anti-nutritional factor that affects the nutrients absorption by the animal. We evaluated the effect of the sorghum with high and low tannins concentrations and / or the addition of tannic acid in diets based on corn and soybean on the single jejunal (duodenum, jejunum and ileum) histomorphometric parameters in broilers. There were used 150 male chicks with 1 day old of Cobb lineage, they were created up to 42 days in cages, in a controlled environment and receiving isoproteic and isoenergetic diets. After the period, were collected fragments of the 3 single jejunal segments, where they were measured and analyzed through a microscope with a coupled camera, according with the established parameters (villus height, crypt depth, thickness of muscle layer and relationship between villus numbers and villus bifurcations numbers). The addition of tannin in diets caused histomorphometric modifications in all parameters, but they did not cause significant changes for affecting their productive performance, such as weight and carcass yield.