Mbwiria S K, Dickinson J O, Bell J F
Trop Anim Health Prod. 1986 Aug;18(3):159-65. doi: 10.1007/BF02359528.
A systematic mapping technique based on blood, forage and soil selenium levels was employed to locate areas of selenium deficiency, adequacy or excess in areas of Kenya where grazing of small ruminants predominates. A total of 1,478 blood samples from both sheep and goats, 180 forage samples and 90 soil samples were analysed for selenium levels. During the wet seasons 28% of the sheep and 15% of the goats had marginal to deficient blood selenium concentrations while during the dry season 20% of the sheep and 12% of the goats had marginal to deficient blood selenium concentrations. Forage samples had a range of 0.03 to 0.66 ppm selenium while soil samples had a range of 0.06 to 0.98 ppm selenium. Although many animals had blood selenium levels of less than 0.05 ppm, below which selenium deficiency signs might occur, none of the animals manifested these signs.
采用一种基于血液、草料和土壤硒水平的系统测绘技术，在肯尼亚以小型反刍动物放牧为主的地区定位硒缺乏、充足或过量的区域。共分析了1478份绵羊和山羊的血液样本、180份草料样本和90份土壤样本中的硒水平。在雨季，28%的绵羊和15%的山羊血液硒浓度处于临界至缺乏水平，而在旱季，20%的绵羊和12%的山羊血液硒浓度处于临界至缺乏水平。草料样本的硒含量范围为0.03至0.66 ppm，土壤样本的硒含量范围为0.06至0.98 ppm。尽管许多动物的血液硒水平低于0.05 ppm，低于该水平可能会出现硒缺乏症状，但没有动物表现出这些症状。
