文献类型： 外文期刊

作者： Xia, W. G. ¹ ; Abouelezz, K. F. M. ¹ ; Makled, M. N. ² ; Wang, S. ¹ ; Chen, W. ¹ ; Zhang, Y. N. ¹ ; Elokil, A. A. ³ ; Wang, S. L. ¹ ; Huang, X. B. ¹ ; Li, K. C. ¹ ; Zheng, C. T. ¹ ;

作者机构： 1.Guangdong Acad Agr Sci, Inst Anim Sci, Key Lab Anim Nutr & Feed Sci South China, Minist Agr,State Key Lab Livestock & Poultry Breed, Guangzhou 510640, Peoples R China

2.Assiut Univ, Fac Agr, Dept Poultry Prod, Assiut 71526, Egypt

3.Benha Univ, Fac Agr, Anim Prod Dept, Moshtohor 13736, Egypt

关键词： Egg yolk lipids; Feed alternatives; Laying waterfowl; Lipid metabolism; Productive performance

期刊名称：ANIMAL （ 影响因子：3.6； 五年影响因子：3.7 ）

ISSN： 1751-7311

年卷期： 2022 年 16 卷 11 期

页码：

收录情况： SCI

摘要： There is an urgent need to evaluate and introduce alternatives for the unsustainable and traditional feed stuffs in poultry. This study evaluated the effects of graded replacement of soybean meal (SBM) by peanut meal (PNM) on egg production, egg quality, oxidative status, and yolk fatty acid profile in laying ducks. In total, 360 Longyan ducks aged 21 weeks were allocated to five treatments, each containing six replicates of 12 birds. Birds were fed the diets containing PNM replacing 0 (control), 25, 50, 75 or 100% of SBM for 16 weeks. With the increase of PNM level, egg production was improved (quadratic, P < 0.05), egg weight and feed consumption were decreased, feed conversion ratio and egg mass were impaired at 100% PNM, and yolk colour was enhanced (quadratic, P < 0.05). Plasma malondialdehyde concentration was increased at 100% PNM, while plasma glutathione concentration was decreased (quadratic, P < 0.01) as PNM substitution increased. Total cholesterol content in yolk decreased (P < 0.01) in response to increased PNM substitution. The contents of saturated fatty acids C20:0 and C22:0 in yolk increased (lin-ear or quadratic, P < 0.05) with increased PNM substitution, but the contents of saturated fatty acid C18:0, monounsaturated fatty acid C22:1, and polyunsaturated fatty acids C18:3n-3 and C22:6n-3 in yolk were decreased (linear, P < 0.05) as PNM replacement increased. The contents in yolk of polyunsaturated fatty acid C18:2n-6, C20:2n-6, C20:3n-6, C20:4n-6, and total amount of polyunsaturated fatty acids increased with the highest contents obtained at 75% PNM substitution. The ratio between n-6 and n-3 increased (linear, P < 0.05) as PNM substitution increased. The transcript abundance in liver of peroxisome proliferators-activated receptors c and fatty acid synthase showed quadratic (P < 0.05) responses with PNM replacement, with the highest expression of both genes being obtained with 75% substitution with PNM. Replacement of dietary SBM with 100% PNM decreased egg production and antioxidant capacity and increased the ratio of omega fatty acid in yolk between n-6 and n-3 in laying ducks. The obtained results indicate that PNM can be used to replace up to 75% of SBM in the diet of laying ducks without negative effects on the egg-laying production or egg quality. The regression model indicated that the maximal egg mass was obtained at no more than 67.6% replacement of SBM with PNM in the diet of lay-ing ducks. (c) 2022 The Author(s).