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http://dx.doi.org/10.5536/KJPS.2010.37.1.001

Effects of Feeding Colloidal Silver and Rare Earth Elements on Growth Performance in Broilers  

Jo, Jong-Kwan (Department of Animal Resources Science, Kangwon National University)
Kim, Jin-Soo (Department of Animal Resources Science, Kangwon National University)
Yun, Ku (Department of Animal Resources Science, Kangwon National University)
Kim, Young-Woo (Department of Animal Resources Science, Kangwon National University)
Kim, Kwang-Hyun (Department of Animal Resources Science, Kangwon National University)
Kwon, Il-Kyung (Department of Animal Products & Food Science, Kangwon National University)
Chae, Byung-Jo (Department of Animal Resources Science, Kangwon National University)
Publication Information
Korean Journal of Poultry Science / v.37, no.1, 2010 , pp. 1-8 More about this Journal
Abstract
An experiment was conducted to investigate the effect of dietary supplementation of rare earth, individually and in combination with colloidal silver on growth performance, nutrient digestibility, carcass characteristics and immune response in broiler chicks. A total of 3,872 day-old chicks were randomly allotted to four dietary treatments in a randomized complete block design. There were four pens per treatment and 242 chicks per pen. The dietary treatments were T1) CON (control diet), T2) colloidal silver (control diet+20 ppb colloidal silver), T3) rare earth elements (control diet+500 ppm rare earth), T4) colloidal silver +rare earth elements (control diet+20 ppb colloidal silver+500 ppm rare earth). There were no significant differences in feed intake and feed conversion ratio (FCR) among dietary treatments during the whole experimental period (0 to 5 weeks). Body weight gain was greatest in birds fed T3 and T4 diets (p<0.01). Apparent digestibility of dry matter, crude protein, ether extract and calcium were greatest in birds fed T4 diet (p<0.05), while apparent digestibility of phosphorus was lowest in birds fed T3 diet (p<0.05). There was no significant difference in bone strength, carcass characteristics and immune response among dietary treatments. Dry matter content of bone was greatest in birds fed T4 diet (p<0.05), and phosphorus content of bone was greater in birds fed T3 diet than in birds fed T2 and T4 diets (p<0.05). Thus, the results of this study suggest that rare earth elements supplementation, individually and in combination with colloidal silver could improve performance of broilers.
Keywords
rare earth elements; colloidal silver; growth performance; nutrient digestibility; broilers;
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Times Cited By KSCI : 4  (Citation Analysis)
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