복분자 부산물 급여에 의한 버크셔 등심의 이화학적 품질 특성 비교
Comparison of Physicochemical Pork Quality of Berkshires Supplemented with Rubus coreanus By-product
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본 연구는 착즙이나 추출 후 폐기되는 복분자(Rubus coreanus) 부산물을 사료자원으로 급여한 버크셔 암컷과 거세돈의 육질특성을 알아보고자실시하였다. 시험 돼지는 Berkshire 품종 총 60두를 암수 구분하여 각 15두씩 임의 배치하였고, 복분자 부산물을 급여하지 않은 대조구와 복분자부산물을 전체 사료의 0.3% 수준으로 출하 전 60일간 급여한 처리구(RC)로 분리하였다. 육질분석을 위하여 도축 후 예비 냉각한 좌반도체 등심부위를 채취하여 일반성분, 이화학적 육질특성, 지방산 및 항산화 활성을 분석하였다. 일반성분은 대조구와 RC간의 유의적 차이가 없었고, 육색에서거세돈육의 명도(L*) 값에서만 RC구에서 대조구 보다 낮은 값을 나타냈다(p<0.05). 등심육의 pH와 보수력은 RC 급여에 의한 유의적 차이가없었으나, 전단력에서는 RC에서 유의적으로 높은 값을 나타냈다(p<0.05). TBARS 수치는 거세돈육의 RC가 대조구에 비해 낮은 경향을 나타냈고, DPPH radical 소거활성에서도 거세돈육의 RC가 대조구보다 높은 항산화능을 나타냈으나 유의적인 차이는 없었고 이는 성별에 의한 차이가 큰것으로 판단된다. 근내지방 함량과 지방산 조성은 RC 급여에 의한 영향보다는 성별에 의한 차이가 뚜렷하게 나타났으며, RC 급여에 따른 항산화특성 패턴이 다르게 나타난 것도 위와 같은 이유인 것으로 판단된다.
Abstract
This study was conducted to determine the meat quality characteristics of castrated and female Berkshire pigs, which were fed with Rubus coreanus (RC) byproducts that were discarded after processing wines or juices. A total of 60 Berkshire pigs (30 sows and 30 barrows) were randomly placed in 15 heads each, and dividing the controls and RC-supplemented groups fed at 0.3% in the basal diet for 60 days prior to slaughtering. For the analysis of meat qualities, the left loins (longissimus dorsi) were collected from the pig carcasses and analyzed for proximate composition, physicochemical traits, fatty acid composition, and antioxidative activities. There were no significant differences of proximate compositions between the control and RC group, and only the meat color L* values of the RC-supplemented barrow pork showed significantly lower than the control(P<0.05). The pH and water-holding capacity of loin samples did not differ significantly by RC supplementation, but the shear force showed significantly higher values in RC groups(P<0.05). The TBARS values of RC loins showed that lipid oxidation was inhibited for barrow pork compared to the control(P>0.05). In DPPH radical-scavenging activity, RC of barrow pork also showed higher activities than the control, but that were influenced by only gender. The differences between intramuscular fat content and fatty acid composition were influenced by only gender rather than by RC supplementation, which can be judged to be the reason why the pattern of antioxidant properties by RC supplementation did differ in each gender.
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