Abstract
This study aimed to explore the effects of Marjoram (Origanum majorana L.), on growth performance, carcass characteristics, and immunity in broilers. A sixty of one-day-old Cobb broiler chicks were randomly divided into 2 groups; Chicks of group 1 were fed on basal diet considered as a control group, chicks of group 2 were fed on an experimental ration containing 2% marjoram. The results showed that the Marjoram significantly increase (P<0.05) some growth factors as bodyweight after 3rd, 4th and 5th weeks, weight gain at 3th and 5th weeks, also significantly improved feed conversion ratio (FCR) at 3rd, 5th weeks in comparison with the control group. Also, Marjoram supplementation at the level of 2% caused a significant elevation (P˂0.05) in gamma globulin, thus marjoram could be considered as an immunity enhancer for broilers. In conclusion, the present study proved that supplementation of the ration with Marjoram could improve growth performance and immunological state in broilers.
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