Vipond J E
Vet Rec. 1984 May 26;114(21):519-21. doi: 10.1136/vr.114.21.519.
The results of a field trial on 18 farms on the effects of dosing ewes with a commercial trace element supplemented to provide 5 mg selenium, 6.5 mg cobalt, 500,000 iu vitamin A, 12,000 iu vitamin D3 and 100 iu vitamin E two weeks before joining the ram showed no beneficial effect on reproductive performance. The mean level of the enzyme glutathione peroxidase (GSH-Px) ranged in control ewes from 8.7 to 58.6 units/ml erythrocytes. Reproductive responses to the treatment varied between farms but the variation was not related to flock selenium status as indicated by the GSH-Px test.
一项针对18个农场的田间试验结果表明，在母羊与公羊配种前两周给母羊投喂一种添加了5毫克硒、6.5毫克钴、500,000国际单位维生素A、12,000国际单位维生素D3和100国际单位维生素E的商业微量元素添加剂，对繁殖性能没有产生有益影响。对照母羊中，谷胱甘肽过氧化物酶（GSH-Px）的平均水平在每毫升红细胞8.7至58.6单位之间。不同农场对该处理的繁殖反应有所不同，但这种差异与通过GSH-Px测试所表明的羊群硒状况无关。
