Hartmans J
Tijdschr Diergeneeskd. 1975 Apr 1;100(7):379-82.
An inquiry among Animal Health Services supplied data on the causes and incidence of copper poisoning in sheep in the Netherlands as well as on the copper levels of concentrates for sheep in random samples and concentrates causing copper poisoning. Approximately one hunderd sheep die from copper poisoning annually, at least 30 per cent of these deaths being due to high copper levels in concentrates for sheep. Provided other factors promoting accumulation of copper are absent, 15 ppm of copper in concentrate DM appear to be a safe limit, whereas levels over 20 ppm involve a definitie hazard.
荷兰动物卫生服务部门进行的一项调查提供了有关该国绵羊铜中毒的原因和发生率的数据，以及随机抽样的绵羊浓缩饲料和导致铜中毒的浓缩饲料中的铜含量数据。每年约有100只绵羊死于铜中毒，其中至少30%的死亡是由于绵羊浓缩饲料中铜含量过高所致。如果不存在其他促进铜积累的因素，浓缩饲料干物质中铜含量为15 ppm似乎是一个安全限度，而超过20 ppm则肯定存在危险。
