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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
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 Title & Authors
Effects of Dietary Supplementation with Branched-chain Amino Acids (BCAAs) during Nursing on Plasma BCAA Levels and Subsequent Growth in Cattle
Li, J.Y.; Suzuki, K.; Koike, Y.; Chen, D.S.; Yonezawa, T.; Nishihara, M.; Manabe, N.;
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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 (0.430.07 kg/day) than the controls (0.710.07 kg/day, p<0.05). However, at 2 months of age, ADG was significantly higher in the BCAA-treated group (1.160.26 kg/day vs. 0.510.06 kg/day, p<0.05). Furthermore, at age 8, 9 and 10 month, ADG in the treated group (1.350.23, 1.460.07 and 1.600.16 kg/day, respectively) showed a linear increase and was significantly higher than that in the control group (0.880.14, 0.700.21 and 1.110.11 kg/kg, respectively, p<0.05). Overall, ADG was 15.6% higher in the treatment group (1.260.05 kg vs. 1.090.04 kg; p<0.05). The final body weight at slaughter was 14.8% higher in the treatment group (759.517.7 kg vs. 661.721.2 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.
Branched-chain Amino Acid;Plasma Concentration;Average Daily Gain;Carcass Weight;Cattle;
 Cited by
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