Copper Status, Serum Cholesterol, and Milk Fatty Acid Profile in Holstein Cows Fed Varying Concentrations of Copper

摘要

An experiment was conducted to determine the ef - fects of dietary copper (Cu) on Cu status and lipid me - tabolism in Holstein cows. Three primiparous an 21 multiparous Holstein cows were utilized in this experi - ment. Groups of three cows similar in parity, days in milk, and milk yield were assigned randomly to one of the following three treatments: 1) control (no supple - mental Cu), 2) 10 mg of Cu/kg of DM from Cu sulfate (CuSO_4), and 3) 40 mg of Cu/kg of DM from Cu sulfate Liver Cu concentrations were higher in Cu supple - Mented cows at the end of the 61-d study.