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KMID : 1025520110530020133
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Journal of Animal Science and Technology
2011 Volume.53 No. 2 p.133 ~ p.138
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Effects of Kaolin (Natural Ligneous Clay) Supplementation on Performance and Egg Quality in Laying Hens
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Kim Jin-Soo
Jo Jong-Kwan
Yoon Se-Young
Yun Ku
Kwon Il-Kyung
Chae Byung-Jo
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Abstract
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Two experiments were conducted to determine the effects of supplementing different levels of kaolin (Exp. 1) and effects of age of layers and levels of kaolin (Exp. 2) on the performance, egg and shell quality parameters of laying hens. In Exp.1, 64 laying hens of 58 wks age were randomly allotted to 4 treatments of 16 hens in each. Dietary treatments were basal diet supplemented with 0.0, 0.2, 0.4 and 0.6% kaolin. In Exp. 2 96 laying hens were divided into 6 groups of 16 hens each in a 2 3 factorial arrangement (two different ages, 30 and 58 wk and three levels of kaolin, 0.0, 0.2 and 0.4%). In both the experiment there were linear decreases in feed intake (P<0.001), improvement in FCR (P<0.05), and egg production (P<0.05), with increasing dietary kolin level. Supplementation of kaolin had no effect on the egg and shell quality parameters in both experiments. Thus, it is concluded that kaolin may improve performance, and 0.2% level showed the best laying performance.
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KEYWORD
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Kaolin, Laying hens, Egg production, Egg quality
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