Asian-Australasian Journal of Animal Sciences

  • 제18권10호
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  • Pages.1440-1444
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  • 2005
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  • 1011-2367(pISSN)
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  • 1976-5517(eISSN)
아세아태평양축산학회 (Asian Australasian Association of Animal Production Societies)
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Effects of Dietary Supplementation with Branched-chain Amino Acids (BCAAs) during Nursing on Plasma BCAA Levels and Subsequent Growth in Cattle

  • Li, J.Y. (Research Unit for Animal Life Science, Animal Resource Science Center, Graduate School of Agricultural and Life Sciences, The University of Tokyo) ;
  • Suzuki, K. (Research Unit for Animal Life Science, Animal Resource Science Center, Graduate School of Agricultural and Life Sciences, The University of Tokyo) ;
  • Koike, Y. (Research Unit for Animal Life Science, Animal Resource Science Center, Graduate School of Agricultural and Life Sciences, The University of Tokyo) ;
  • Chen, D.S. (Research Unit for Animal Life Science, Animal Resource Science Center, Graduate School of Agricultural and Life Sciences, The University of Tokyo) ;
  • Yonezawa, T. (Department of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo) ;
  • Nishihara, M. (Department of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo) ;
  • Manabe, N. (Research Unit for Animal Life Science, Animal Resource Science Center, Graduate School of Agricultural and Life Sciences, The University of Tokyo)
  • 투고 : 2004.11.01
  • 심사 : 2005.04.22
  • 발행 : 2005.10.01
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초록

To determine the effects of short-term dietary supplementation of branched-chain amino acids (BCAAs) during nursing (from 3 to 28 days of age) on plasma BCAA levels and subsequent growths in cattle, 12 nursing male Holstein calves, randomly assigned to control and treatment groups (n = 6 in each group), orally received a daily supplement of essential BCAAs (2 g/kg body weight/day; 1:1:1 of valine, leucine and isoleucine) or not. The plasma BCAA levels increased linearly after the administration. During the treatment period, average daily gain (ADG) was lower in the treatment group (0.43${\pm}$0.07 kg/day) than the controls (0.71${\pm}$0.07 kg/day, p<0.05). However, at 2 months of age, ADG was significantly higher in the BCAA-treated group (1.16${\pm}$0.26 kg/day vs. 0.51${\pm}$0.06 kg/day, p<0.05). Furthermore, at age 8, 9 and 10 month, ADG in the treated group (1.35${\pm}$0.23, 1.46${\pm}$0.07 and 1.60${\pm}$0.16 kg/day, respectively) showed a linear increase and was significantly higher than that in the control group (0.88${\pm}$0.14, 0.70${\pm}$0.21 and 1.11${\pm}$0.11 kg/kg, respectively, p<0.05). Overall, ADG was 15.6% higher in the treatment group (1.26${\pm}$0.05 kg vs. 1.09${\pm}$0.04 kg; p<0.05). The final body weight at slaughter was 14.8% higher in the treatment group (759.5${\pm}$17.7 kg vs. 661.7${\pm}$21.2 kg, p<0.01). Thus, the supplementation of BCAAs during nursing improves ADG and carcass weight in cattle and is a useful husbandry technique for beef cattle.

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참고문헌

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