Overnes G, Moksnes K, Frøslie A, Nørstebø J G, Flaat J
Acta Vet Scand. 1985;26(3):405-16. doi: 10.1186/BF03546540.
This paper describes 3 experiments comparing the effect of 10, 25 and 40 mg Se/kg, as sodium selenite, in mineral mixtures and salt licks fed to sheep. The supplement was given during the indoor season from October to May to 7 different flocks, each consisting of 50 to 100 sheep, in areas with selenium deficiency problems. The average selenium level in the basic diets did not exceed 0.05 mg/kg. Selenium status was monitored in the blood of ewes and lambs, and in milk. Blood selenium in lambs correlated well with blood selenium in their dams (r = 0.85). Selenium levels in milk on day 1 (colostrum) correlated well with selenium levels in dams (r = 0.92) and in offspring (r = 0.87). Statistically significant differences were found between the different flocks. In areas with extreme selenium deficiency, 10 mg Se/kg in mineral mixtures and salt licks proved insufficient. A content of 25 mg Se/kg, providing a daily intake of about 0.4 mg selenium, resulted in selenium levels in ewes’ blood, ewes’ milk and in the offspring that should prevent selenium deficiency disease without causing any toxic effects.
本文描述了3项实验，比较了以亚硒酸钠形式添加到喂羊的矿物质混合物和盐砖中的10、25和40毫克硒/千克的效果。在10月至5月的室内饲养季节，向7个不同的羊群（每个羊群由50至100只羊组成）提供这种补充剂，这些地区存在硒缺乏问题。基础日粮中的平均硒水平不超过0.05毫克/千克。对母羊和羔羊的血液以及乳汁中的硒状况进行了监测。羔羊血液中的硒与它们母羊血液中的硒相关性良好（r = 0.85）。第1天（初乳）乳汁中的硒水平与母羊（r = 0.92）和后代（r = 0.87）中的硒水平相关性良好。在不同的羊群之间发现了统计学上的显著差异。在极度缺硒地区，矿物质混合物和盐砖中添加10毫克硒/千克被证明是不够的。25毫克硒/千克的含量，每日提供约0.4毫克的硒摄入量，使得母羊血液、母羊乳汁和后代中的硒水平足以预防硒缺乏疾病，且不会产生任何毒性作用。
