Lactational Performance of Cows Fed Low or High Ruminally Undegradable Protein Prepartum and Supplemental Methionine and Lysine Postpartum

Multiparous Holstein cows (n = 24) were fed diets containing 34 or 41% ruminally undegradable protein (RUP) for 30 d before parturition; then each group was fed a basal diet supplemented with or without ruminally stable Met (10.6 g/d) and Lys (15.2 g/d) for 75 d in the subsequent lactation. Suppleme... View More