1. 维生素E 缓解蛋白质氧化豆粕对蛋鸡生产性能、 消化功能和鸡蛋品质的影响
- Author
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王坤, 何青芬, 程业飞, 陈跃平, 温超, and 周岩民
- Abstract
[ Objectives] This experiment aimed to study the effects of vitamin E( VE) supplementation on laying performance, digestive function, and egg quality of laying hens fed with protein-oxidized soybean meal. [Methods] A total of 384 Hy-Line laying hens(41 weeks of age)were randomly divided into 4 groups with 8 replicates of 12 hens each. The hens in the control group were fed a basal diet with refrigerated fresh-keeping soybean meal, while the hens in the protein-oxidized group were given protein-oxidized soybean meal diet(soybean meal was stored at room temperature for thirty days), and the stored soybean meal diet supplemented with 100 mgkg-1 either synthetic VE(synthetic VE group) or natural VE(natural VE group), for 6 weeks, respectively, after a 1-week period of pretest. [ Results] Compared with the protein-oxidized group, natural VE inclusion significantly increased laying rate (P<0.05), whereas reduced feed-to-egg ratio of laying hens( P <0.05)ꎻcompared with the control and protein-oxidized groups, synthetic VE supplementation significantly reduced feed intake( P<0.05). Compared with the protein-oxidized group, inclusion of natural or synthetic VE significantly increased the high-density lipoprotein cholesterol concentration in the serum of laying hens (P<0.05)ꎻcompared with the control and protein-oxidized groups, synthetic VE supplementation significantly reduced low-density lipoprotein cholesterol concentration in the serum( P < 0. 05). Compared with the control group, protein-oxidized soybean meal significantly reduced the trypsin activity in the ileal chyme( P < 0.05), with it being recovered to normal level by natural VEsupplementation(P > 0. 05)ꎻ compared with the protein-oxidized group, inclusion of natural and synthetic VE both significantly increased(P <0.05) trypsin activity in the jejunal chyme of laying hensꎻcompared with the protein-oxidized group, synthetic VE significantly increased pancreatic amylase activity(P<0.05). Compared with the control and protein-oxidized groups, synthetic VE supplementation significantly increased protein height and haugh units in the egg of laying hens(P<0.05). [Conclusions]Dietary VE supplementation could improve laying performance, digestive function, and egg quality of laying hens receiving protein-oxidized soybean meal. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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