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Effects of Dietary Rumen-Protected Betaine on Lactation Performance and Serum Metabolites of Mid-lactation Holstein Dairy Cows.
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2020-03-17 , DOI: 10.1021/acs.jafc.9b07453 Caihong Wang 1 , He Liu 1 , Chong Wang 2 , Jianxin Liu 1 , Hongyun Liu 1
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2020-03-17 , DOI: 10.1021/acs.jafc.9b07453 Caihong Wang 1 , He Liu 1 , Chong Wang 2 , Jianxin Liu 1 , Hongyun Liu 1
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This experiment was conducted to investigate the effects of dietary rumen-protected betaine (RPB) supplementation, as partial replacement for methionine, on the lactation performance of mid-lactation dairy cows. A total of 36 Holstein dairy cows were randomly assigned to three groups [control, 20 g/day RPB, or 15 g/day rumen-protected methionine (RPM)]. The experiment was conducted over 9 weeks, with the first week for adaptation. Blood metabolites were analyzed with metabolomics in the control and RPB groups. The results revealed that the milk yield and milk protein content were higher in cows fed RPB and RPM compared to those in the control group. Concentrations of nine metabolites differed between cows in the RPB and control groups. These metabolites were mainly concentrated in six pathways, such as arginine synthesis and proline degradation and cyanoamino acid synthesis. This study revealed that RPB can spare methionine and improve lactation performance of dairy cows fed with diets moderately deficient in methionine.
中文翻译：
饲喂瘤胃的甜菜碱对泌乳中期荷斯坦奶牛泌乳性能和血清代谢产物的影响。
进行该实验以研究饮食中的瘤胃保护甜菜碱（RPB）补充（作为蛋氨酸的部分替代品）对泌乳中期奶牛泌乳性能的影响。将总共36头荷斯坦奶牛随机分为三组[对照组，20 g /天RPB或15 g /天瘤胃保护的蛋氨酸（RPM）]。实验进行了9周，第一周进行了适应。在对照组和RPB组中用代谢组学分析了血液代谢产物。结果显示，与对照组相比，RPB和RPM喂养的奶牛的产奶量和乳蛋白含量更高。RPB组和对照组的奶牛中9种代谢物的浓度不同。这些代谢物主要集中在六个途径中，如精氨酸的合成和脯氨酸的降解以及氰基氨基酸的合成。这项研究表明，RPB可以节省蛋氨酸并改善饲喂中等蛋氨酸日粮的奶牛的泌乳性能。
更新日期：2020-03-17
中文翻译：
饲喂瘤胃的甜菜碱对泌乳中期荷斯坦奶牛泌乳性能和血清代谢产物的影响。
进行该实验以研究饮食中的瘤胃保护甜菜碱（RPB）补充（作为蛋氨酸的部分替代品）对泌乳中期奶牛泌乳性能的影响。将总共36头荷斯坦奶牛随机分为三组[对照组，20 g /天RPB或15 g /天瘤胃保护的蛋氨酸（RPM）]。实验进行了9周，第一周进行了适应。在对照组和RPB组中用代谢组学分析了血液代谢产物。结果显示，与对照组相比，RPB和RPM喂养的奶牛的产奶量和乳蛋白含量更高。RPB组和对照组的奶牛中9种代谢物的浓度不同。这些代谢物主要集中在六个途径中，如精氨酸的合成和脯氨酸的降解以及氰基氨基酸的合成。这项研究表明，RPB可以节省蛋氨酸并改善饲喂中等蛋氨酸日粮的奶牛的泌乳性能。
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