Dargatz D A, Ross P F
USDA, APHIS, Veterinary Services, Ft. Collins, CO 80521, USA.
J Anim Sci. 1996 Dec;74(12):2891-5. doi: 10.2527/1996.74122891x.
This study was conducted to determine the geographic distribution of selenium deficiency among beef cows and heifers in selected states. Whole blood selenium concentrations were determined for cows and heifers on 253 cow-calf operations in 18 states. Overall, 7.8% of the samples were severely deficient, and another 10.4% of the samples were considered marginally deficient for selenium. Blood selenium concentrations varied by geographic region. Cattle from the southeastern states were more commonly considered severely or marginally deficient (18.6% and 23.8%, respectively) than cattle from other regions. Herds from the southeastern states were also more commonly considered severely or marginally deficient (14.9% and 20.9%, respectively) than herds from other regions. Blood selenium concentration also varied by whether selenium had been supplemented to the herd. We conclude that blood selenium levels for cattle vary by geographic region and selenium supplementation of the herd.
本研究旨在确定特定州内肉牛母牛和小母牛中硒缺乏的地理分布情况。对18个州253个母牛-犊牛养殖场的母牛和小母牛的全血硒浓度进行了测定。总体而言，7.8%的样本严重缺乏硒，另有10.4%的样本被认为硒含量处于边缘缺乏状态。血硒浓度因地理区域而异。东南部各州的牛比其他地区的牛更常被认为严重缺乏或边缘缺乏硒（分别为18.6%和23.8%）。东南部各州的牛群也比其他地区的牛群更常被认为严重缺乏或边缘缺乏硒（分别为14.9%和20.9%）。血硒浓度还因牛群是否补充了硒而有所不同。我们得出结论，牛的血硒水平因地理区域和牛群的硒补充情况而异。
