Effect of using prebiotics on broilers diet

An experiment was conducted to study the effect of different levels of prebiotic on performance, carcass composition and blood parameters of broilers for 42 days. A completely randomized design with 320 Ross 308 chickens was used. Four treatments including: 1) control (without prebiotic) 2) recommended level, 3) 50% higher and 4) 50% lower than recommended level of prebiotic were considered. Each treatment consisted of five replicates of 16 chickens. For performance traits (gain, feed intake and feed conversion ratio), there were no significant differences among treatments in different production periods. The result of carcass percent indicated that there were no significant effects among treatments but thigh percent in second treatment was significantly higher compared to fourth treatment (P<0.05). No significant differences for blood parameters (glucose, cholesterol, triglyceride, HDL and hematocrite) were found among treatments. In current experimental condtion, no significant differences were found among different levels of prebiotic on performance and blood parameters.