关键词: 百里香精油, 麻花鸡, 新城疫, 免疫球蛋白, 阳性α-醋酸萘酯酶

Abstract: [Objective] To study the effects of different dietary levels of thyme essential oil (TEO) on the immune status in broiler chickens. [Method] 768selected one-day-old Mahua broilers were divided into 8dietary treatment groups,namely,0.00,0.05,0.10,0.15,0.20,0.25,0.30 and 0.35 mg/kg each with 4replicate pens and 24birds within each replicate.The feeding program included a starter diet until 21dand a finisher diet until to 42 d. [Results] Compared with the control,the percentage of ANAE⁺ lymphocyte can be significantly improved (P<0.05)in the treatments of 0.1,0.15,0.25,0.35 mg/kg at the 42nd day's.In the treatment of 0.35 mg/kg,the level of the antibody against to NDV of Mahua broilers was markedly increased (P<0.05).In the treatments of 0.2,0.25 and 0.3 mg/kg the level of the IgM,IgG and IgA were significantly improved (P<0.05)at 21st day and 42nd day's. [Conclusion] According to all the data,0.1-0.25 mg/kg is a optimum addition amount of TEO in this text.

Key words: Thyme essential oil, Mahua broiler, newcastle disease, immune globulin, ANAE⁺