Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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Effects of Dietary Lysine and Leucine Levels on Growth Performance and Meat Quality Parameters in Finishing Pigs

사료 중 Lysine과 Leucine 수준별 첨가가 비육돈의 생산성 및 육질특성에 미치는 영향

  • Moon, Hong-Kil (Swine Science Division, National Institute of Animal Science, RDA) ;
  • Lee, Sung-Dae (Swine Science Division, National Institute of Animal Science, RDA) ;
  • Jung, Hyun-Jung (Swine Science Division, National Institute of Animal Science, RDA) ;
  • Kim, Young-Hwa (Swine Science Division, National Institute of Animal Science, RDA) ;
  • Park, Jun-Cheol (Swine Science Division, National Institute of Animal Science, RDA) ;
  • Ji, Sang-Yun (Swine Science Division, National Institute of Animal Science, RDA) ;
  • Kwon, Oh-Sub (Swine Science Division, National Institute of Animal Science, RDA) ;
  • Kim, In-Cheul (Swine Science Division, National Institute of Animal Science, RDA)
  • 문홍길 (농촌진흥청 축산과학원 양돈과) ;
  • 이성대 (농촌진흥청 축산과학원 양돈과) ;
  • 정현정 (농촌진흥청 축산과학원 양돈과) ;
  • 김영화 (농촌진흥청 축산과학원 양돈과) ;
  • 박준철 (농촌진흥청 축산과학원 양돈과) ;
  • 지상윤 (농촌진흥청 축산과학원 양돈과) ;
  • 권오섭 (농촌진흥청 축산과학원 양돈과) ;
  • 김인철 (농촌진흥청 축산과학원 양돈과)
  • Published : 2008.10.01
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Abstract

This study was conducted to investigate effects of dietary supplementation of lysine and leucine on growth performance and meat quality parameters in finishing pigs. The experiment was designed using lysine levels(0.45%, 0.75%) and leucine levels(1.0%, 2.0%, 3.0%) according to 2×3 factorial design. A total of thirty-six pigs[(Landrace×Yorkshire)×Duroc] with an average initial weight of 75.5±2kg were allotted to one of the six dietary treatments. Each treatment had three replications of two pigs per replicate. No difference was found in average daily gain(P>0.05), while feed intake and feed/gain were higher in 0.45% of lysine treatments than in 0.75% of lysine treatments(P<0.05). Retail lean meat percentage was lower in 0.45% of lysine treatments than in 0.75% of lysine treatments(P<0.05), but there were no differences in other carcass characteristics(P>0.05). Marbling score was significantly increased(P<0.05) in 0.45% of lysine treatments compared to 0.75% of lysine treatments, while other meat quality parameters were not affected by lysine levels(P>0.05). Supplemental dietary leucine had no effect on growth performance, carcass characteristics, and meat quality parameters(P>0.05) except that Hunter b* value were increased with added levels of leucine(P<0.05). In conclusion, feeding of lysine-deficient diets in finishing pigs improved marbling scores of pork. Feeding diets high in leucine, however, did not increase intramuscular fat or marbling scores.

본 연구는 비육돈 사료내 lysine 및 leucine 수준과 그들간의 상호작용이 성장 및 육질특성에 미치는 효과를 구명하기 위하여 수행하였다. 공시동물은 일령이 비슷하고 체중이 75.5±2kg인 3원교잡종 36두를 공시하였다. 처리구는 사료 중 lysine 함량 2수준(0.45%, 0.75%)과 leucine 함량 3수준(1.0%, 2.0%, 3.0%)의 2×3 요인실험으로, 처리 당 3반복, 반복당 2두씩 완전임의배치하였다. 일당증체량은 요인 및 처리간 차이를 보이지 않았으나, 일당사료섭취량 및 사료요구율은 lysine 0.45% 수준의 사료를 섭취한 시험구가 lysine 0.75% 수준의 사료를 섭취한 시험구보다 유의적으로 높았다(P<0.05). 거래 정육율은 lysine 0.45% 수준의 사료를 섭취한 시험구가 lysine 0.75% 수준의 사료를 섭취한 시험구보다 유의적으로 낮았으나(P<0.05), 기타 도체특성에서는 요인 및 처리간 차이를 보이지 않았다. 상강도(marbling score)는 lysine 0.45% 수준의 사료를 섭취한 시험구가 lysine 0.75% 수준의 사료를 섭취한 시험구보다 유의적으로 높았으나(P<0.05), 기타 육질특성에서는 요인 및 처리간 차이를 보이지 않았다. Leucine 수준에 따른 성장, 도체 및 육질특성에 있어 황색도를 나타내는 Hunter b* 값이 leucine 수준이 증가함에 따라 유의적으로 높게 나타났으나(P<0.05), 기타 조사항목에서는 요인 및 처리간 차이를 보이지 않았다. 결론적으로 비육후기에 저 lysine 사료를 급여 시 기호성이 높은 고 상강도의 돈육생산이 가능할 것으로 사료된다. 그러나 고 leucine 사료는 근내지방이나 상강도를 증가시키지 않는다.

Keywords

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