The Effects of Fermacto, Bactocell and Biostrong in Antibioticfree Diets on the Performance of Broilers

The aim of this study was to compare the effects of three antibiotic alternatives with a control (Antibioticfree) and an antibiotic diet on performance and gut morphology of broilers reared on litter. 600 dayold ROSS308 chicks were assigned to 48 pens in a CRD design with 6 × 2 factorial arrangements, in which 2 levels of chick density (5 and 7.5 chicks/m2) and 6 experimental diets (control, virginiamycin, fermacto, bactocell, biostrong and biostrong matrixvalue formulated or biostrongMV) were used. Higher chick density increased starter feed intake and decreased grower feed conversion ratio (FCR) significantly (p lt;0.05). Average daily gains (ADG) were not different among experimental diets except biostrongMV that was the least. FCR of different diets were equal, both in starter and grower period. Performance traits didn’t influenced by Diet × density interaction. Relative weight of digestive organs, especially jejunum, in antibiotic diets were lesser than other diets (P lt;0.05). The length per gram of jejunum resulted from experimental diets were similar, and so for ileum except that of fermacto that was significantly lesser than biostrong (p lt;0.05). The result of current experiment (winter and cornsoybean based diets) had shown that antibiotic alternatives not only didn’t have an effect similar to antibiotic but also to control diet. Furthermore matrixvalue method of diet formulation with biostrong lessened chick performance