Effect of Zizyphus vulgaris Supplementation on Growth Performance, Blood Cortisol and Meat Quality Characteristics in Finishing Pig

비육돈 사료내 산조인(Zizyphus vulgaris)의 급여가 성장 혈액내 Cortisol 및 육질 특성에 미치는 영향

  • Cho Jin-Ho (Department of Animal Resource & Sciences, Dankook University) ;
  • Han Young-Geun (National Agricultural Co-operative Federation) ;
  • Kwon Oh-Suk (Department of Animal Resource & Sciences, Dankook University) ;
  • Min Byoung-Joon (Department of Animal Resource & Sciences, Dankook University) ;
  • Son Kyoung-Seung (Department of Animal Resource & Sciences, Dankook University) ;
  • Chen Ying-Jie (Department of Animal Resource & Sciences, Dankook University) ;
  • Kim In-Ho (Department of Animal Resource & Sciences, Dankook University)
  • 조진호 (단국대학교 동물자원과학과) ;
  • 한영근 (농협중앙회) ;
  • 권오석 (단국대학교 동물자원과학과) ;
  • 민병준 (단국대학교 동물자원과학과) ;
  • 손경승 (단국대학교 동물자원과학과) ;
  • 진영걸 (단국대학교 동물자원과학과) ;
  • 김인호 (단국대학교 동물자원과학과)
  • Published : 2005.03.01

Abstract

This study was conducted to evaluate the effects of Zizyphus vulgaris supplementation on growth performance, blood cortisol and meat quality characteristics in finishing pigs. The total of thirty-six [Duroc${\times}$Yorkshir${\times}$Landrace] pigs ($91{\pm}2.11$ kg average initial body weight) were used in a 30-days assay. Dietary treatments included 1) CON (basal diet), 2) T1 (basal diet for 15 days and 0.1 % Zizyphus vulgaris for 15 days) and 3) T2 (0.1 % Zizyphus vulgaris for 30 days). The ADG (Average daily gain), ADFI (Average daily feed intake) and ADG/ADFI during the feeding period were not significantly differences among the treatments (p>0.05). Backfat thickness of pigs fed CON was higher than those of T1 and T2 (p<0.05). The appearance rate of A or B carcass grade was in T1 (74%) and T2 (84%) was significantly higher than that in CON (58%) (p<0.05). Pigs fed Zizyphus vulgaris 0.1 % for 30 days tended to decrease on blood cortisol compared with pigs fed CON and T1. But, there was not significantly difference among the treatments (p>0.05). The Hunter's L/sup */ (lightness) value of loin in the pork fed CON was higher than that of loin in the pork fed T1 and T2 (p<0.05). After 7 days, the L/sup */ value of loin in the pigs fed T2 was higher increased than that of pigs fed T1 and CON (p<0.05). However, a/sup */ and b/sup */ values were not affected by dietary Zizyphus vulgaris (p>0.05). There were not found remarkable differences in sensory properties (marbling, firmness and color) among the treatments. The results from the present study suggest that Zizyphus vulgaris could be a effective feed additive to improve meat quality of pigs. However, further research is needed to investigate effects of carcass characteristics.

본 연구는 비육돈 사철내 산조인의 첨가가 성장, 혈액 내 cortisol 및 육질에 미치는 효과를 알아보고자 실시하였다. 3원 교잡종(Duroc${\times}$Yorkshir${\times}$Landrace) 비육돈 36두를 공시하였으며 시험개시시의 체중은 $91{\pm}2.11$ kg이었다. 시험설계는 옥수수-대두박 위주의 사료를 30일동안 급여한 처리구(CON:대조구), 대조구 사료를 15일 급여후 산조인 0.1% 첨가한 사료를 15일 급여한 처리구(T1), 대조구 사료내 산조인 0.1%를 첨가하여 30일간 급여한 처리구(T2)로 3개 처리를 하여 처리당 3반복 반복당 4두씩 임의 배치하였다. 증체량, 사료섭취량 및 사료효율은 전 시험기간에서 처리구간의 통계적인 차이를 보이지는 않았으나, 대조구에 비해 산조인을 첨가한 처리구가 사료섭취량은 감소하면서 사료효율은 증가하는(p<0.05)경향을 보였다. 등지방 두께는 대조구에 비해 T1처리구가 유의적으로 얇게 나타났다(p<0.05). 처리구별 A등급과 B등급의 출현율은 CON이 58%, T1은 74%, 그리고 T2는 84%를 보였다. 등심의 L/sup */값은 대조구가 다른 처리구들에 비해 높게 나타났지만(p<0.05) 저장 7일후 처 리구 모두 증가하는 경향을 보였고 T2 처리구가 다른 처리구들에 비해 높게 나타났다 (p<0.05). 또한 적색도를 나타내는 a/sup */값과 황색도를 나타내는 b/sup */값에서 처리구간의 유의적인 차이는 없었다. 혈액 내 cortisol의 수준은 처리구간의 유의적인 차이는 보이지 않았으나 T2 처리구가 낮은 경향을 보였다. 마블링, 단단함 및 육색의 NPPC에 의한 결과에서는 처리구간의 유의적인 차이는 보이지 않았다. 이상의 결과를 종합하여 볼 때, 사료내 산조인의 첨가는 육질에 영향을 미칠 수 있을 것으로 보이나, 기능성 돈육으로서의 비육돈 자체의 생리활성이나 돈육의 지방산 조성등 육질 평가에 대한 더 많은 연구가 필요하리라 여겨진다.

Keywords

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