The experiment aimed to study the effects of oregano essential oil on the growth performance,immune function,and slaughter performance of Ward 168 broilers.A total of 1 000 one-day-old Ward 168 broilers were selected and randomly divided into two groups,with five replicates per group and 100 chickens per replicate.The control group was fed a basic diet,while the experimental group was fed the basic diet supplemented with 300 g/t of oregano essential oil.The trial period was 45 days.The results showed that compared to the control group,the feed-to-gain ratio of the experimental group broilers was significantly reduced(P＜0.05),and the semi-eviscerated yield,fully eviscerated yield,breast muscle rate,and leg muscle rate were all significantly increased(P＜0.05).Compared to the control group,the levels of serum IgA and IgM in the experimental group broilers,as well as the activities of GSH-Px,SOD,and T-AOC,were all significantly or extremely increased(P＜0.05 or P＜0.01),while the levels of IL-1β,IFN-y,and MDA were significantly or extremely reduced(P＜0.05 or P＜0.01).Compared to the control group,the organ index of the spleen in the experimental group broilers was significantly increased(P＜0.05),and the organ index of the bursa of Fabricius was extremely increased(P＜0.01).The study indicates that the addition of 300 g/t oregano essential oil to the diet can improve the growth performance,immune capacity,antioxidant performance,and slaughter performance of broilers.
维普
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