Instituto de Ganadería de Montaña, CSIC-Universidad de León, E-24346 Grulleros, León, Spain.
Departamento de Higiene y Tecnología de los Alimentos, Universidad de León, Campus de Vegazana s/n, E-24071 León, Spain.
Food Res Int. 2018 Jun;108:42-47. doi: 10.1016/j.foodres.2018.03.030. Epub 2018 Mar 12.
Thirty male merino lambs were fed with a pelleted total mixed ration (TMR) alone or supplemented with hop (Humulus lupulus L.) cones at two different doses (1.5 and 3.0 g hop cones/kg pelleted TMR, respectively), to study the effects of this dietary source of antioxidants on animal performance, ruminal parameters and meat quality attributes. The results showed that dietary supplementation with hop cones decreased lambs' growth rate (P < 0.05) due to a shift in ruminal fermentation, towards a more acetic and less propionic acid production (P < 0.05). These changes in animal growth rate might have promoted microstructural modifications in the quantity and size of muscle fibres, thereby inducing the differences observed in meat chemical composition, colour and texture (P < 0.05), regardless of the lack of differences in meat antioxidant status (P > 0.10).
30 只雄性美利奴羊仅用颗粒化全混合日粮（TMR）喂养，或用两种不同剂量的啤酒花（Humulus lupulus L.）花（分别为 1.5 和 3.0 g 啤酒花花/kg 颗粒化 TMR）补充，研究这种抗氧化剂的饮食来源对动物性能、瘤胃参数和肉质特性的影响。结果表明，由于瘤胃发酵向更乙酸和更少丙酸生产的转变（P<0.05），啤酒花花的日粮补充降低了羔羊的生长率。这些动物生长率的变化可能促进了肌肉纤维数量和大小的微观结构的改变，从而导致观察到的肉质化学成分、颜色和质地的差异（P<0.05），而与肉质抗氧化状态的差异无关（P>0.10）。
