Effects of selenium source and level on growth performance, tissue selenium concentrations, antioxidation, and immune functions of heat-stressed broilers
文献类型: 外文期刊
第一作者: Liao, Xiudong
作者: Liao, Xiudong;Lu, Lin;Li, Sufen;Liu, Songbai;Zhang, Liyang;Luo, Xugang;Liao, Xiudong;Wang, Guangying;Li, Ang;Li, Sufen
作者机构:
关键词: Antioxidation;Heat-stressed broilers;Immune response;Selenium
期刊名称:BIOLOGICAL TRACE ELEMENT RESEARCH ( 影响因子:3.738; 五年影响因子:3.44 )
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收录情况: SCI
摘要: An experiment is conducted to investigate the effects of selenium (Se) source and level on growth performance, tissue Se concentrations, antioxidation, and immune functions of heat-stressed broilers from 22 to 42 days of age. A total of 210 22-day-old Arbor Acres commercial male chicks were assigned by body weight to one of seven treatments with six replicates of five birds each in a completely randomized design involving a 3 × 2 factorial arrangement plus one Se-unsupplemented basal diet control (containing 0.027 mg of Se/kg). The three Se sources were sodium selenite (Na2SeO3), Se yeast, and AMMS Se (Se protein), and the two supplemental Se levels were 0.15 or 0.30 mg Se/kg. All birds were reared under heat-stressed condition (33 ± 1 °C during 0900-1700 hours and 27 ± 1 °C during 1900-0700 hours with a relative humidity of 60-80 %). The results showed that heat-stressed chicks fed Se-supplemented diets had higher (P < 0.10) average daily feed intake, Se concentrations in liver and breast muscle, liver glutathione peroxidase (GSH-Px) activity, serum antibody titers against H5N1(Re-4 strain), H5N1(Re-5 strain) and lower (P < 0.01) mortality compared with the control. Chicks fed the diets supplemented with 0.30 mg/kg of Se had higher (P < 0.05) Se concentrations in liver and breast muscle, liver GSH-Px activity, and serum antibody titer against H5N1 (Re-4 strain) than those fed the diets supplemented with 0.15 mg/kg of Se. Broilers fed the diets supplemented with Se yeast had higher (P < 0.001) Se concentrations in liver and breast muscle than those fed the diets supplemented with Na2SeO3 or AMMS Se. However, broilers fed the diets supplemented with AMMS Se had higher (P < 0.05) serum antibody titers against H5N1 (Re-4 strain) and H5N1 (Re-5 strain) than those fed the diets supplemented with Na2SeO3. These results indicated that Se yeast was more effective than Na2SeO 3 or AMMS Se in increasing tissue Se retention; however, AMMS Se was more effective than Na2SeO3 or Se yeast in improving immune functions of heat-stressed broilers.
分类号: Q5
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