Notice of Retraction Effects of Zanthoxylum on Growth Performance, Immune Function and Carcass Characteristics in Broilers

This paper was aimed to investigate effects of zanthoxylum on growth performance, immune function and carcass characteristics in broilers. A total of 320 male AA broilers (1 day of age) were randomly allotted to 4 groups (control, A, B, C), each group has 4 replicates with 20 broilers in each replicate, and fed basal diets supplemented with 0%, 0.10%, 0.20% and 0.30% zanthoxylum for 42 days, respectively. The results showed that compared with the control group, weight gain and FCR of B and C groups were increased significantly,whereas, the abdominal fat percentage were reduced significantly (P<;0.05). In addition, thymus index, bursal of fabricius index, globulin content, antibody titer of chicken newcastle disease of A and B groups were significant increase, respectively (P<;0.05). These results indicated that zanthoxylum (from 0.2% to 0.3%) of feed could increased growth performance, improve carcass characteristics and immune function in broilers.