School of Veterinary Science, University of Bristol, Langford, Bristol, UK.
Meat Sci. 2012 Apr;90(4):908-16. doi: 10.1016/j.meatsci.2011.11.031. Epub 2011 Nov 28.
Groups of 8 lambs were allocated to one of five concentrate diets supplemented with all-rac-α-tocopheryl acetate containing 30 (C30), 60 (C60), 120 (C120), 250 (C250) and 500 (C500) mg/kg dry matter. Two other groups were fed grass silage and 400 g/day concentrate with 60 (S60) or 500 (S500) mg α-tocopheryl acetate/kg dry matter. Within diet, vitamin E level did not affect growth performance or carcass characteristics. Basal diet did not affect final live weight, conformation and fatness scores. M. semimembranosus from S lambs contained more α-tocopherol than that of C lambs on the same intake and by day 6 in MAP (75%O2/25%CO2) chroma and a* were below acceptable levels in C30 lambs. TBARS were higher in C30 and C60 muscle than in other treatments (P<0.001) after 3 and 6 days display. Muscle fatty acid composition varied with basal diet but lipid oxidation depended more on vitamin E concentration with an initial concentration of 1.9 μg/g muscle preventing significant lipid oxidation.
将 8 组羔羊分配到五种浓缩饲料中的一种，这些饲料都添加了含有 30（C30）、60（C60）、120（C120）、250（C250）和 500（C500）mg/kg 干物质的全-rac-α-生育酚乙酸酯。另外两组羔羊则喂食草青贮料和 400g/天的浓缩饲料，其中含有 60（S60）或 500（S500）mg α-生育酚乙酸酯/kg 干物质。在日粮中，维生素 E 水平并不影响生长性能或胴体特性。基础日粮不影响最终活重、体型和脂肪评分。在相同的摄入量和 MAP（75%O2/25%CO2）条件下，S 组羔羊的 M. semimembranosus 肌肉中α-生育酚含量高于 C 组羔羊，且 C30 组羔羊的 chroma 和 a*在第 6 天低于可接受水平。在 3 和 6 天的展示后，C30 和 C60 肌肉中的 TBARS 高于其他处理组（P<0.001）。肌肉脂肪酸组成随基础日粮而变化，但脂质氧化更多地取决于维生素 E 浓度，初始浓度为 1.9μg/g 肌肉可防止脂质氧化显著增加。
