Authors : A. Pirestani and S. Eghbalsaeed
Abstract: The aim of this study was to compare the effects of bolus and dietary supplements on production, fat, protein and SNF of milk and the evaluation of the udder immune system by SCC of Holstein dairy cattle. In this study 2 groups containing 30 cattle were selected with an average of milk production 30±2 kg and the same of the parity and days in milk. Both supplements were the same in composition. Dietary supplement was used in control group as TMR and bolus (2 bolus/cow) were used in the treatment group for 6 months. Milk sample was collected 1 week later from the beginning, 3 and 6 months after the examination for analyzed SCC, milk production, percent of fat, protein and SNF of milk. Results indicated that the treatment group lead to a significant increase of milk production compared to the control group and fat and SNF milk were higher than the control group but it wasn’t significant. Also, between the two groups no significant differences were observed on SCC and milk protein at total sampling. It was concluded that bolus supplement had the same effects with dietary supplement in dairy cattle.
A. Pirestani and S. Eghbalsaeed, 2011. The Comparison Effects of Bolus and Dietary Supplements on Production, Milk Compositions and Udder Immune System of Holstein Dairy Cattle. Journal of Animal and Veterinary Advances, 10: 1404-1407.