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Effects of Amino Acid-enriched Ruminally Protected Fatty Acids on Plasma Metabolites, Growth Performance and Carcass Characteristics of Hanwoo Steers
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 Title & Authors
Effects of Amino Acid-enriched Ruminally Protected Fatty Acids on Plasma Metabolites, Growth Performance and Carcass Characteristics of Hanwoo Steers
Park, Byung-Ki; Choi, Nag-Jin; Kim, Hyeong-Cheol; Kim, Tae-Il; Cho, Young-Moo; Oh, Young-Kyoon; Im, Seok-Ki; Kim, Young-Jun; Chang, Jong-Soo; Hwang, In-Ho; Jang, Hyun-Yong; Kim, Jong-Bok; Kwon, Eung-Gi;
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 Abstract
This study was conducted to determine the effects of amino acid-enriched ruminally protected fatty acid (AARPFA) on plasma fatty acids and amino acids, growth performance and carcass characteristics of Korean native steers (Hanwoo) by simultaneous supply of fatty acids and limiting amino acids (methionine and lysine). Eighteen finishing Hanwoo steers, 18 months of age and weighing an average of , were used for studies of the metabolism of plasma fatty acids and amino acids during supplementation of AARPFA. Also, 45 finishing Hanwoo steers, 16 months of age and weighing an average of , were used for growth performance and carcass characteristics during supplemention of AARPFA. There were three treatments which comprised a basal diet supplemented with AARPFA at 0 g (T1), 50 g (T2) or 100 g (T3), respectively. Concentrations of saturated, unsaturated and total fatty acids in plasma were increased in T3 compared with other treatments (p<0.05). Concentrations of methionine and lysine in plasma were linearly increased with increasing levels of AARPFA (p<0.01). Average daily gain, dry matter intake and feed conversion ratio were not different among the treatments. Marbling score measured by ultra-sound scanning was higher in T3 than in T1 at 24 months of age (p<0.05). Rib eye area, back fat thickness, yield index and yield grade score were similar across the treatments. Marbling score and quality grade score were higher in T3 compared with other treatments (p<0.01). Thus, plasma fatty acids, methionine and lysine metabolism were affected by supplementing with 100 g of AARPFA which also had positive effects on marbling score and meat quality grade of finishing Hanwoo steers.
 Keywords
Hanwoo Steers;Fatty Acids;Amino Acids;Marbling Score;Quality Grade;
 Language
English
 Cited by
1.
Effects of Ruminally Protected Amino Acid-enriched Fatty Acids on Growth Performance and Carcass Characteristics of Fattening Hanwoo Cows,;;;;;;;;;

Journal of Animal Science and Technology, 2010. vol.52. 6, pp.499-504 crossref(new window)
2.
한우 당대검정 탈락축의 산육능력 및 육질 향상에 관한 연구,김형철;이창우;박병기;이상민;권응기;임석기;전기준;박연수;홍성구;

Journal of Animal Science and Technology, 2010. vol.52. 5, pp.427-434 crossref(new window)
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