control on the wheat non-starch polysaccharides (nsp)’ anti-nutritional effect on intestinal wall, by introducing xylanase in broiler feed

The experiment was performed in order to determine the protocol of xylanase utilization to fight against the antinutritional effect exerted by wheat non-starch polysaccharides (NSP) on intestinal wall in broilers. The experimental works were carried out on broilers, the hybrid Ross 308. We formed four experimental groups, as follows: the experimental group LE1, fed on forage without wheat in its structure, the experimental group LE2, fed on combined forage including wheat in a proportion of 40%, the experimental group LE3 including wheat in a proportion of 40% and xylanase, in an amount of 25 g / to, and the experimental group LE4, including wheat in a proportion of 40% and xylanase, in an amount of 100 g. At 3 and 6 weeks, successive to chicken killing, we sampled the intestinal wall and determined the main changes occurred. The histo-morpho-metric analysis of the four experimental groups led to the conclusions that: wheat administration in a proportion of 40% in the individuals in LE2 determines the development of vilositary muscle elements, decreased of intestinal villosities height, leucocitary migration, and also vascular ectasies and reduced hemorrhagic areas; xylanase addition in the wheat-based feed may be associated with the increase of intestinal villosities height, and especially at jejuna level the villosities seem slightly branched, a slight hypertrophy of the epithelial cells compared with the individuals in LE2, the increase of goblet cells frequency and hypertrophy of the capillary network. These microscopic aspects come together with more intens digestion and absorption processes, and especially in the experimental group 4.