Waltner-Toews D, Martin S W, Meek A H
Can J Vet Res. 1986 Jul;50(3):347-50.
Hair samples from newborn heifer calves on Holstein dairy farms in southwestern Ontario were analyzed for selenium content by means of instrumental neutron activation analysis. The mean selenium level in the hair of calves which subsequently died at less than six weeks of age did not differ from selenium levels in the hair of calves matched by farm and birthday (overall mean 0.28 ppm). The mean selenium level in the hair of calves which were not treated for disease during the first four weeks of life was 0.42 ppm, while that from appropriately matched treated calves was 0.36 ppm; the difference between the means was significant at p = 0.054. Based on the above associations, it is suggested that higher selenium levels in newborn calves may have some protective effect against morbidity.
通过仪器中子活化分析法，对安大略省西南部荷斯坦奶牛场新生小母牛犊的毛发样本进行了硒含量分析。随后在六周龄前死亡的犊牛毛发中的平均硒水平，与按农场和出生日期匹配的犊牛毛发中的硒水平没有差异（总体平均水平为0.28 ppm）。在出生后前四周未接受疾病治疗的犊牛毛发中的平均硒水平为0.42 ppm，而经过适当匹配的接受治疗的犊牛毛发中的平均硒水平为0.36 ppm；两者均值的差异在p = 0.054时具有显著性。基于上述关联，表明新生犊牛中较高的硒水平可能对发病率有一定的保护作用。
