Departamento de Zootecnia, Universidade Estadual de Maringá, Maringá, PR 87020-900, Brazil.
Departamento de Zootecnia, Universidade Federal de Minas Gerais, Belo Horizonte, MG 31270-901, Brazil.
J Dairy Res. 2019 Aug;86(3):279-282. doi: 10.1017/S0022029919000529. Epub 2019 Jul 22.
This research communication addresses the hypothesis that the association of dietary vitamin E and Yerba Mate could help to prevent or decrease oxidation of milk enriched in unsaturated fatty acids (UFA). Four multiparous lactating Holstein cows were used in a 4 × 4 Latin square. Treatments were: (1) control diet with no Yerba Mate or vitamin E; (2) diet containing 375 IU/kg vitamin E; (3) diet containing 30 g/kg Yerba Mate; and (4) diet containing 375 IU/kg vitamin E and 30 g/kg Yerba Mate. To increase unsaturated fatty acids in milk, cows were fed 172 g/kg soybean seeds (on a dry matter basis). There was no interaction between vitamin E and Yerba Mate supplementation for milk antioxidant-related (polyphenols, reducing power, conjugated dienes, and TBARS) analyses. Milk reducing power was increased when cows were supplemented with Yerba Mate. Our results suggest that the association of dietary vitamin E and Yerba Mate does not help to prevent or decrease oxidation of milk in UFA.
本研究通讯探讨了这样一个假设，即饮食中维生素 E 和 Yerba Mate 的结合可能有助于预防或减少富含不饱和脂肪酸 (UFA) 的牛奶的氧化。本研究使用了 4 头经产荷斯坦奶牛进行了 4×4 拉丁方试验。处理方法如下：(1) 不含 Yerba Mate 或维生素 E 的对照饮食；(2) 含 375 IU/kg 维生素 E 的饮食；(3) 含 30 g/kg Yerba Mate 的饮食；(4) 含 375 IU/kg 维生素 E 和 30 g/kg Yerba Mate 的饮食。为了增加牛奶中的不饱和脂肪酸，奶牛喂食了 172 g/kg 的大豆种子（基于干物质基础）。维生素 E 和 Yerba Mate 补充对与牛奶抗氧化相关的分析（多酚、还原力、共轭二烯和 TBARS）没有相互作用。当奶牛补充 Yerba Mate 时，牛奶的还原力增加。我们的结果表明，饮食中维生素 E 和 Yerba Mate 的结合并不能帮助预防或减少富含 UFA 的牛奶的氧化。
