tailieunhanh - Báo cáo khoa học: " Plasma Vitamin E and Blood Selenium Concentrations in Norwegian Dairy Cows: Regional Differences and Relations to Feeding and Health"

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 y đề tài: Plasma Vitamin E and Blood Selenium Concentrations in Norwegian Dairy Cows: Regional Differences and Relations to Feeding and Health. | Acta vet. scand. 2005 46 177-191. Plasma Vitamin E and Blood Selenium Concentrations in Norwegian Dairy Cows Regional Differences and Relations to Feeding and Health By T Sivertsen1 2 G. 0vernes O. 0sterảs3 1 U. Nymoen1 and T. Lunder3 Norwegian School of Veterinary Science Oslo. 2National Veterinary Institute Oslo. 3TINE ltd. Âs. Sivertsen T 0vernes G 0sterâs O Nymoen U Lunder T Plasma vitamin E and blood selenium concentrations in Norwegian dairy cows Regional differences and relations to feeding and health. Acta vet. scand. 2005 46 177-191. - Plasma a-to-copherol vit E and blood selenium Se concentrations in February were determined in samples from 314 dairy cows in Norway selected to provide a representative subset of the Norwegian dairy cow population. Each sample was followed by a questionnaire with information about feeding of the cow at the time of sampling. The results were correlated to herd data and to calving and health data for each cow from the Norwegian Dairy Herd Recording System and the Norwegian Cattle Health Recording System. The mean concentrations were pg vit E per ml plasma and pg Se per g blood. Both levels were highest in mid lactation. Plasma vit E varied with the amount of silage fed to the cow while blood Se varied with the amount of concentrates and mineral supplements and with geographical region. No differences in vit E or Se levels were found between cows with recorded treatments for mastitis parturient paresis or reproductive disorders in the lactation during or immediately prior to sampling and those without such treatments. For ketosis a small difference in blood Se was found between the groups with or without recorded treatments. It is concluded that winter-fed lactating cows in Norway had an adequate plasma level of vit E and a marginal-to-adequate level of Se. Vitamin E selenium dairy cows feeding health mastitis reproduction Norway. Introduction The general significance of adequate vitamin E vit E and selenium Se levels

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