Lactation Performance of Primiparous Holstein Dairy Cows in Early Postpartum Period an affected by feeding Dry glycerol

Abstract

Abstract : Effects of feeding a dry glycerin product (minimal 65% of food grade glycerol, dry powder) to 20 primiparous Holstein dairy cows (10 control and 10 glycerin supplemented) on milk yield and composition were investigated. Dry glycerin was fed at 250 g/d (corresponding to 162.5 g of glycerol/d) as a top dressing to the common lactating total mixed ration. Study was carried out from parturition to 21 d postpartum. Individual milk was sampled from 3 consecutive milkings weekly and was analyzed for its components. Average milk yield and milk compositions were not affected by dry glycerin supplementation.