초생추에 (初生雛) 있어서 Chromium 의 독성과 Silver Copper 및 Zinc 와의 상호작용 = The Toxicity of Chromium and Its Interaction with Silver , Copper and Zinc in the Chicks

다국어 초록 (Multilingual Abstract)

In order to study the toxic level of dietary trivalent or hexavalent chromium and its interaction with silver, copper and zinc on the growth, mortality and feed requirement, an experiment was conducted with 780 chicks(Hanhyub 603) for a period of 3 weeks. The results obtained from the experiment are summarized as follows: 1. Chicks(0-3wk) fed 4,000ppm of trivalent chromium exhibited considerable growth depression(p $lt; 0.05), but showed no adverse effects on the mortality. 2. Growth depression induced by dietary trivalent chromium was not relived by silver or zinc, but relived slightly by copper. 3. Chicks(0-3wk) fed 1500ppm of hexavalent chromium exhibited considerable growth depression and mortality(p $lt; 0.05). Growth depression induced by dietary hexavalent chromium was not relieved by copper, zinc and copper + zinc, but mortality was significantly(p $lt; 0.05) relieved only by zinc. 4. The feed requirement was increased as the level of dietary chromium was increased, and adding silver, copper, zinc and copper+zinc failed to improve the feed requirement.