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Effects Of Dietary Zinc Source And Level On Mammary Epithelia And Dairy Food Chemistry, J. Shaffer, K. Pandalaneni, L. Mamedova, J. Defrain, J. Amamcharla, B. Bradford

Kansas Agricultural Experiment Station Research Reports

Twelve lactating Holstein cows (132 ± 21 days in milk) were enrolled in a Latin square experiment to explore the extent to which source and amount of supplemental dietary Zn can impact barrier function of mammary epithelial tissue. Cows received either 970 mg supplemental Zn/day as ZnSO₄(LS), 1,640 mg supplemental Zn/day as ZnSO₄(HS), or 1,680 mg supplemental Zn/day as a mixture of ZnSO₄and Zn methionine complex (HC). Treatments lasted for 17 days followed by 4 days of sample collection. Blood and milk were collected and analyzed for markers of blood-milk leak including plasma lactose …