Synchronic use of multi-enzyme and probiotic on performance of broilers with wheat and barley based diet

The objective of this study was to evaluate the synchronic use of multi-enzyme and probiotic on broilers performance. This factorial experimental was conducted in a randomized complete design and included 480 Ross broiler chicks (Strain 308) which were divided into 6 treatments and each treatment into 4 replicates and 20 chicks in each replicate. The wheat and barley based diet was constant for all treatments. Multi-enzyme is used in three levels (zero، half level and suggested level (500 gram)) and probiotic in two levels (zero and suggested level). At the end of experiment، all chicks are weighted. then from each replicate 2 chicks were killed to measure carcass traits and characteristics of different parts of intestine. At the total of the experiment period (1-45 days)، the results showed that the application of multi-enzyme (at suggested level) was caused further weight gain and improvement of feed conversion ratio (P<0. 05). No significant differences were observed in feed intake in application of only multi-enzyme or probiotic. Use of only probiotic and only multi-enzyme was decreased FCR in total period (P<0. 05). carcass percentage was increased significantly in use of enzyme، probiotic and synchronic use of them (P<0. 05). Thigh and breast percent were not significant. Abdominal fat percent was decreased in use of synchronic enzyme and probiotic (P<0. 05). Percentage of liver، duodenum and jejunum length declined significantly in use of only enzyme (p<0. 05). use of only enzyme or only probiotic was advisable for Improvement of FCR. but the use of synchronic enzyme and probiotic doesn’t have any additive effect on broiler performance.