
叶酸和甜菜碱对围产期奶牛泌乳性能、乳脂肪酸组成、养分消化和瘤胃发酵的影响
Effects of Folic Acid and Betaine on Lactation Performance, Milk Fatty Acid Composition, Nutrient Digestion and Rumen Fermentation of Dairy Cows during Perinatal Period
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