The Impact of Pre and Probiotic on Growing Performance in Ross 708 Broiler Chickens

Abstract

The research was conducted on “ROSS 708†broiler to evaluate the effects of dietary supplementation with prebiotics and probiotics in broiler growth performance, feed conversion ratio and effect on some hematologic parameters.Day old broiler chicks were divided into 4 groups: probiotic fed group, prebiotic fed group, pro and prebiotic fed group (synbiotic) and control group. Control group was fed a broiler chicken commercial ratio. The probiotic group was fed with a same commercial ratio with BetaPro300® (Biochem) a probiotic containing Bacillus subtilis DSM 17299 in a dose of 8x108 UFC/kg. The prebiotic added for the third group contained an extract derived from cell walls of the baker yeast Saccharomyces cerevisiae (TechnoMos® - Biochem) with a dose of 0,5- 1,0 kg/t. 700 g prebiotics were added in 1 tone and 300 g probiotics were added to each tone of commercial ratio. Weight of 50 birds was measured daily. The body weight, average total weight gain and feed conversion rate were significantly increased by the dietary inclusion of the both pre and probiotic (2081g total body weight, 1,49 kg feed/kg weight gain) compared with the control (1875,8g, 1,71 kg feed/kg weight gain). The pre and probiotics have a beneficial effect in the health and productivity of broiler chickens especially when used together as symbiotic. Hematological parameters varied in physiological limits of species. In probiotic -treated chickens, hematocrit, erythrocyte and leukocyte numbers were higher compared with the other groups (p˃0,05). Supplementation of feedstuffs with probiotics and prebiotics show promising effects as an alternative for antibiotics in order to eliminate these drugs as growth-promoting additives.