Gilbert R W, Sander J E, Brown T P
Department of Avian Medicine, College of Veterinary Medicine, University of Georgia, Athens 30602-4875, USA.
Avian Dis. 1996 Jan-Mar;40(1):236-9.
A flock of 51-week-old leghorn hens experienced a 16% drop in egg production in a single week. The layer ration contained 1477 ppm copper from the addition of copper sulfate. Severe oral ulcers were present in the pharynx. Oral ulcers, reduced feed intake, and a drop in egg production occurred when a ration containing 1437 ppm copper was evaluated experimentally.
一群51周龄的来亨鸡在一周内产蛋量下降了16%。蛋鸡日粮因添加硫酸铜而含有1477 ppm的铜。鸡的咽部出现严重口腔溃疡。当对含有1437 ppm铜的日粮进行实验评估时，出现了口腔溃疡、采食量减少和产蛋量下降的情况。
