초생추에 있어서 3 가 ( 價 ) Chromium 의 독성에 미치는 Cobalt 의 영향에 관한 연구 = Studies on the Influence of Cobalt on Chromium ( 3 ) Toxicity in the Chicks

다국어 초록 (Multilingual Abstract)

In order to study the toxic level of dietary trivalent chromium and its interaction with cobalt on the growth, mortality and feed requirement, an experiment was conducted with 480 chicks(Hisex White) for a period of 5 weeks. Four levels of trivalent chromium ( 0 ppm, 500 ppm, 1, 500 ppm, and 2, 500 ppm) were added in the absence or presence of cobalt 150ppm. The results obtained from the experiment are summarized as follows. 1. Chicks (0-5 wk) fed 500 ppm of trivalent chromium showed no adverse effect on the growth rate, but those fed 1,500 ppm and 2,500 ppm of trivalent chromium exhibited considerable growth depression (P $lt; 0.05) . 2. Chicks fed 500 ppm, 1,500 ppm and 2,500 ppm of trivalent chromium showed no mortality. 3. Feed requirement was increased as the level of dietary trivalent chromium was increased, and it was found that dietary cobalt failed to improve the feed requirement.