本试验旨在探索鸭油过氧化值对肉仔鸡生长和屠宰性能、脏器指数及血浆抗氧化、免疫、抗体指标的影响。选择108只1日龄健康爱拔益加（AA）肉仔鸡，随机分为6组，每组3个重复，每个重复6只鸡。对照组饲喂基础饲粮，鸭油组分别在基础饲粮中添加3%过氧化值为3.8、17.0、30.0、43.0和56.0 meq/kg的鸭油。预试期7 d，正试期28 d。结果表明：1）30.0、43.0和56.0 meq/kg鸭油组的平均日增重显著低于对照组（P<0.05），56.0 meq/kg鸭油组的料重比显著高于对照组（P<0.05）。2）30.0、43.0和56.0 meq/kg鸭油组的脾脏、胸腺指数显著低于对照组（P<0.05），43.0和56.0 meq/kg鸭油组的肾脏指数和各段小肠厚度显著低于对照组（P<0.05），56.0 meq/kg鸭油组的肌胃指数指数显著低于对照组（P<0.05）。3）15和35日龄时，30.0、43.0和56.0 meq/kg鸭油组的血浆过氧化氢酶、羟自由基活性和总抗氧化能力显著低于对照组（P<0.05），血浆丙二醛含量显著高于对照组（P<0.05）；43.0和56.0 meq/kg鸭油组的血浆超氧化物歧化酶、谷胱甘肽过氧化物酶活性显著低于对照组（P<0.05）。4）15日龄时，30.0、43.0和56.0 meq/kg鸭油组的血浆白细胞介素（IL）-4、IL-6、免疫球蛋白（Ig）A、IgG含量显著低于对照组（P<0.05），43.0和56.0 meq/kg鸭油组的血浆干扰素-γ（IFN-γ）、IL-2、IgM含量显著低于对照组（P<0.05）。35日龄时，30.0、43.0和56.0 meq/kg鸭油组的血浆IL-2、IL-4、IL-6、IgA、IgG、IgM含量显著低于对照组（P<0.05），43.0和56.0 meq/kg鸭油组的血浆IFN-γ含量显著低于对照组（P<0.05）。5）15日龄时，30.0、43.0和56.0 meq/kg鸭油组的血浆传染性法氏囊病毒抗体（IBDV-Ab）、新城疫病毒抗体（NDV-Ab）水平显著低于对照组（P<0.05），43.0和56.0 meq/kg鸭油组的血浆H₉N₁禽流感病毒抗体（H₉N₁-Ab）水平显著低于对照组（P<0.05）。35日龄时，43.0和56.0 meq/kg鸭油组的血浆IBDV-Ab、H₉N₁-Ab水平显著低于对照组（P<0.05），56.0 meq/kg鸭油组的血浆NDV-Ab水平显著低于对照组（P<0.05）。由此可见，高过氧化值鸭油能降低肉仔鸡的生长性能、抗氧化功能和免疫功能；饲粮中鸭油过氧化值应低于17.0 meq/kg。

This experiment was conducted to study the effects of peroxide value of duck oil on growth and slaughter performance, organ index and plasma antioxidant, immune, antibody index of broilers. A total of 108 healthy one-day-old Arbor Acres (AA) broilers were randomly divided into 6 groups with 3 replicates per group and 6 broilers per replicate. Broilers in the control group were fed a basal diet, and others in duck oil groups were fed basal diets supplemented with 3% duck oil with 3.8, 17.0, 30.0, 43.0 and 56.0 meq/kg peroxide values, respectively. The pre-experimental period lasted for 7 days, and the experimental period lasted for 28 days. The results showed as follows:1) the average daily gain of 30.0, 43.0 and 56.0 meq/kg duck oil groups was significantly lower than that of the control group (P<0.05), the feed to gain ratio of 56.0 meq/kg duck oil groups was significantly higher than that of the control group (P<0.05). 2) The indexes of spleen, thymus of 30.0, 43.0 and 56.0 meq/kg duck oil groups were significantly lower than those of the control group (P<0.05), the kidney index and small intestine thickness of 43.0 and 56.0 meq/kg duck oil groups were significantly lower than those of the control group (P<0.05), the gizzard index of 56.0 meq/kg duck oil group was significantly lower than that of the control group (P<0.05). 3) On 15 and 35 days of age, the catalase, hydroxyl radicals activities and total antioxidant capacity in plasma of 30.0, 43.0 and 56.0 meq/kg duck oil groups were significantly lower than those of the control group (P<0.05), and the plasma malondialdehyde content was significantly higher than that of the control group (P<0.05); the activities of superoxide dismutase and glutathione peroxidase in plasma of 43.0 and 56.0 meq/kg duck oil groups were significantly lower than those of the control group (P<0.05). 4) On 15 days of age, the contents of interleukin (IL)-4, IL-6, immunoglobulin (Ig)A and IgG in plasma of 30.0, 43.0 and 56.0 meq/kg duck oil groups were significantly lower than those of the control group (P<0.05), and the contents of interferon-γ (IFN-γ), IL-2 and IgM in plasma of 43.0 and 56.0 meq/kg duck oil groups were significantly lower than those of the control group (P<0.05). On 35 days of age, the contents of IL-2, IL-4, IL-6, IgA, IgG and IgM in plasma of 30.0, 43.0 and 56.0 meq/kg duck oil groups were significantly lower than those of the control group (P<0.05), and the plasma IFN-γ content of 43.0 and 56.0 meq/kg duck oil groups was significantly lower than that of the control group (P<0.05). 5) On 15 days of age, the levels of infectious bursal disease virus antibody (IBDV-Ab) and newcastle disease virus antibody (NDV-Ab) in plasma of 30.0, 43.0 and 56.0 meq/kg duck oil groups were significantly lower than those of the control group (P<0.05), and the plasma H₉N₁ avian influenza virus antibody (H₉N₁-Ab) level of 43.0 and 56.0 meq/kg duck oil groups was significantly lower than that of the control group (P<0.05). On 35 days of age, the levels of IBDV-Ab and H₉N₁-Ab in plasma of 43.0 and 56.0 meq/kg duck oil groups were significantly lower than those of the control group (P<0.05), and the plasma NDV-Ab level of 56.0 meq/kg duck oil group was significantly lower than that of the control group (P<0.05). It is concluded that high peroxide value of duck oil can decrease the growth performance, antioxidant function and immune function of broilers. The peroxide value of duck oil in diet should not be higher than 17.0 meq/kg.