Pehrson B, Ling K, Ortman K
Department of Animal Environment and Health, Swedish University of Agricultural Sciences, Skara, Sweden.
Acta Vet Scand. 1997;38(4):353-6. doi: 10.1186/BF03548482.
The concentration of selenium in soils and crops varies widely in different parts of the world. The selenium status of many countries is unknown, but there is evidence that selenium deficient crops occur in every continent. Surveys in Finland 1970), Norway 1967), Denmark 1975) and Sweden 1970) were among the first to investigate selenium status and they showed that each of these countries was very deficient. As a result selenium was permitted to be included as a supplement in animal feeds, in Finland from 1969, in Denmark from 1975, and in Norway and Sweden from 1980.
世界不同地区土壤和农作物中的硒浓度差异很大。许多国家的硒状况尚不清楚，但有证据表明各大洲都有缺硒作物。芬兰（1970年）、挪威（1967年）、丹麦（1975年）和瑞典（1970年）开展的调查是最早一批对硒状况进行调查的，这些调查表明这些国家均严重缺硒。因此，芬兰自1969年起、丹麦自1975年起、挪威和瑞典自1980年起允许在动物饲料中添加硒作为补充剂。
