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Báo cáo khoa học: "Prediction of Vitamin A, Vitamin E, Selenium and Zinc Status of Periparturient Dairy Cows Using Blood Sampling During the Mid Dry Period"

Tuyển tập các báo cáo nghiên cứu về bệnh thú y được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành thú y đề tài: Prediction of Vitamin A, Vitamin E, Selenium and Zinc Status of Periparturient Dairy Cows Using Blood Sampling During the Mid Dry Period. | Acta vet. scand. 2004 45 119-128. Prediction of Vitamin A Vitamin E Selenium and Zinc Status of Periparturient Dairy Cows Using Blood Sampling During the Mid Dry Period By G. E. Meglia1 K. Holtenius2 L. Petersson2 P Ohagen4 and K. Persson Waller1 5 department of Obstetrics and Gynaecology department of Animal Nutrition and Management and department of Ruminant Medicine and Veterinary Epidemiology Swedish University of Agricultural Sciences Uppsala department of Chemistry and department of Ruminant and Porcine Diseases National Veterinary Institute SVA Uppsala Sweden. Meglia GE Holtenius K Petersson L Ồhagen P Persson Waller K Prediction of vitamin A vitamin E selenium and zinc status of periparturient dairy cows using blood sampling during the mid dry period. Acta vet. scand. 2004 45 119-128. - Vitamins A and E and the trace elements selenium Se and zinc Zn are essential for the health and performance of dairy cows. Their concentrations often decrease around calving and extra supplementation is sometimes recommended at that time. However the need for this varies for example depending on quantity and quality of feedstuffs in the diet. The aim of this study was to measure the concentrations of serum vitamin A S-vit A and vitamin E S-vit E plasma Se P-Se and serum Zn S-Zn in blood samples taken at several time points from one month before to one month after calving and to evaluate if a blood sample taken during the mid dry period can accurately predict the blood concentration at calving and early lactation. Dairy cows on 3 different feeding regimens during the dry period were included in the study. A significant decrease in the concentrations of S-vit A and S-vit E and S-Zn was observed at calving and P-Se was significantly lower during the dry period and at calving than in early lactation. The blood concentrations of S-vit E and P-Se in the mid dry period significantly predicted the occurrence of values considered marginal or deficient at the time of calving. The .