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Influence of nutrient density and lighting regime in broiler chickens: Effect on antioxidant status and immune function

文献类型： 外文期刊

作者： Guo, Y. L. 1 ; Li, W. B. 1 ; Chen, J. L. 2 ;

作者机构： 1.Gansu Agr Univ, Fac Anim Sci & Technol, Lanzhou 730070, Peoples R China

2.Chinese Acad Agr Sci, Inst Anim Sci, Beijing, Peoples R China

关键词： immune function;antioxidant balance;nutrient density;lighting regime

期刊名称：BRITISH POULTRY SCIENCE （ 影响因子：2.095； 五年影响因子：2.266 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： 1. The effects of nutrient density and lighting regime on oxidant status and immune function of broilers were investigated in a 2 x 4 experimental design (8 groups of 576 chickens). 2. There were two nutrient densities: high (H) starter diet AME 13 center dot 39 MJ/kg, 230 g crude protein (CP)/kg: finisher 13 center dot 39 MJ/kg, 197 g CP/kg CP) and low (L) starter AME 12 center dot 03 MJ/kg, 208 g CP/k; finisher 12 center dot 14 MJ/kg, 183 g CP/kg C. The 4 lighting regimes were continuous (CL) 23L:1D, 20L:4D (12L:2D:8L:2D), 16L:8D (12L:3D:2L:3D:2L:2D) and 12L:12D (9L:3D:1L:3D:1L:3D:1L:3D). Blood and lymphoid organs were collected at d 21 and 42 for assay of antioxidant indices and immunity. 3. Chickens fed low density diet had a higher Fabricius bursa weight (FBW). Low density diet tended (P = 0 center dot 089) to increase the a-Naphthylacetate esterase (ANAE) positive percentage response at 42 d. 4. The 12L:12D schedule decreased serum malondialdehyde compared with other regimes at 21 d. At 42 d, it was lower in the 12L:12D and 16L:8D groups than in CL and 20L:4D. There was a trend (P = 0 center dot 086) for greater superoxide dismutase activity in the 12L:12D and 16L:8D groups than under the CL and 20L:4D regimes at 42 d. ANAE positive percentage in 12L:12D group at 42 d was higher than in CL and 20L:4D groups. Plasma IgG in the 12L:12D group at 42 d was higher than in the CL group. 5. There was an interaction between nutrient density and lighting regime for FBW at 42 d. 6. These results demonstrate that low nutrient density and a 12L:12D schedule lighting schedule can enhance oxidant-antioxidant balance and the immune functions of broilers.

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