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KMID : 1025520000420060871
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Journal of Animal Science and Technology
2000 Volume.42 No. 6 p.871 ~ p.880
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Effects of Dietary Supplements of Clay Mineral on the Growth Performance and Immunity in Hanwoo Calves
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조원모/Cho, W. M.
송만강/안병석/김준식/최성복/백봉현/강우성/Song, M. K./Ahn, B. S./Kim, J. S./Choi, S. B./Pack, B. H./Kang, W. S.
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Abstract
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The study was conducted to investigate the effect of dietary supplements of clay additives on the growth performance and immunity in Hanwoo calves. Treatment were composed of control(basal diet) and 3 treatments(basal diet+5% illite, bentonite, and kaolinite). This study was carried out for 90 days with a total of 16 calves from 8 days of age after birth. Basal diet(milk replacer and calf starter) were fed ad libitim during entire experimental period and the results obtained were as follows : 1. Total weight gains throughout the experimental period from 8 days to 90 days of age were 34.88, 36.10, 35.97, and 39.23㎏ for non-supplemented (control), Illite-, Bentonite-, and Kaolinite-supplemented groups, respectively. It tended to be higher in clay mineral-supplemented groups than in control group, however, no statistical significances were found. 2. Average daily intakes of calf starter were 0.66, 0.80, 0.71, and 0.76㎏, and those of hay were 0.11, 0.12, 0.10, and 0.14㎏ for control, Illite-, Bentonite-, and Kaolinite-supplemented groups, respectively. It tended to be higher in clay mineral-supplemented groups than in control group, however, no statistical significances were found. 3. The Proportion of CD2, CD4 as welt as CD8 of T cytotoxic/suppressor cell (19.67% vs 15.27 to 17.10%) was higher in control group than in clay mineral-supplemented groups.
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