Growth Performance and Duodenum Morphology of Arian Male Broilers Fed Different Probiotics in Starter Phase

The aim of the present study was to compare two different types of probiotics on Arian male broiler duodenum morphology and growth performance in starter phase. 378  one-d-old chickens were allocated in 3 experimental groups and 6 replicates with 21 broilers in each replicate for 21 days. Experimental treatments included 1) control diet  ,without probiotic. 2) birds supplemented with Bacillus subtilis based probiotic. Birds supplemented with lactic acid bacteria based probiotics. At the end of experiment growth performance include feed intake, growth and feed conversion rate were recorded, one birds from each replicate was slaughtered and 1 cm of midpoint of the duodenum was taken and sent to laboratory to be studied by light microscopy. In the current experiment, there were no significance differences between probiotic addition groups and control for growth performance. Duodenum villus height, width, crypt depth, villus height/crypt-depth and surface area were not affect by probiotic addition. According to result of this experiment Bacillus subtilis or lactic acid bacteria-based probiotic usage had no effect on growth performance and duodenum morphology by light microscopy study in the starter phase.