放牧季节结束时肉牛群的硒状态、繁殖性能和退行性肌病
Selenium status at the end of the grazing season, reproductive performance and degenerative myopathy in beef herds.
作者信息
Waldner Cheryl L, Van De Weyer Leanne M
机构信息
Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, 52 Campus Drive, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5B4.
出版信息
Can Vet J. 2011 Oct;52(10):1083-8.
The objectives of this study were to describe the serum selenium (Se) concentrations of beef cows from herds with varying levels of reproductive success, to examine factors associated with the Se concentrations at the end of the grazing season, and to determine if there were any associations between serum Se and reproductive success or calf viability. In the fall of 2001, 781 serum samples from 66 herds were analyzed as part of a nested case-control study to investigate risk factors for fertility; 10.6% were deficient in Se (< 0.025 ppm) and 86.8% were less than adequate (< 0.08 ppm). Low serum Se was most common in thin cows where feed Se was < 0.2 ppm, and from areas with more precipitation or with black or gray soils. Serum Se at pregnancy testing was not associated with an increased risk of reproductive failure. Lower herd serum Se was associated with increased risk of identifying degenerative myopathy in the subsequent calf crop (P = 0.006).
本研究的目的是描述来自繁殖成功率不同的牛群的肉牛母牛血清硒（Se）浓度，研究放牧季节结束时与硒浓度相关的因素，并确定血清硒与繁殖成功率或犊牛活力之间是否存在任何关联。2001年秋季，作为一项嵌套病例对照研究的一部分，对来自66个牛群的781份血清样本进行了分析，以调查生育风险因素；10.6%的样本硒缺乏（<0.025 ppm），86.8%的样本硒含量不足（<0.08 ppm）。血清硒水平低在瘦母牛中最为常见，这些母牛的饲料硒含量<0.2 ppm，且来自降水量较多或土壤为黑色或灰色的地区。妊娠检测时的血清硒与繁殖失败风险增加无关。牛群血清硒水平较低与随后犊牛群中出现退行性肌病的风险增加相关（P = 0.006）。
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