Smart M E, Cymbaluk N F, Christensen D A
Can Vet J. 1992 Mar;33(3):163-70.
Primary and secondary copper deficiency has been identified in most Canadian provinces. Research has been done investigating the environmental and dietary factors that influence dietary copper availability and the effect of deficient copper status on the health and production of cattle. Across Canada, a high percentage of forages and grains are marginal to deficient in copper. In certain regions, high sulphates in the water and/or high molybdenum concentrations in the feed decrease dietary copper availability. The value of various oral and parenteral copper supplements in the treatment and prevention of copper deficiency is discussed.
加拿大大部分省份已发现原发性和继发性铜缺乏症。已开展研究，调查影响日粮铜可利用性的环境和日粮因素，以及铜缺乏状态对牛健康和生产性能的影响。在加拿大全国，很大比例的草料和谷物铜含量处于临界缺乏至缺乏状态。在某些地区，水中高硫酸盐含量和/或饲料中高钼浓度会降低日粮铜的可利用性。本文讨论了各种口服和注射用铜补充剂在治疗和预防铜缺乏症方面的价值。
