Food Science of Animal Resources (한국축산식품학회지)

Korean Society for Food Science of Animal Resources (한국축산식품학회)
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The Effects of Dietary $MgSO_4$ Supplement on Serum Stress Hormones Concentrations and Pork Quality in Late Finishing Pigs

출하 전 마그네슘 단기급여가 돼지의 혈중 스트레스 관련 호르몬 함량 및 육질에 미치는 영향

  • Seong Pil-Nam (National Institute of Subtropical Agriculture, RDA) ;
  • Lee Jong-Eun (National Institute of Subtropical Agriculture, RDA) ;
  • Cho In-Chul (National Institute of Subtropical Agriculture, RDA)
  • 성필남 (농촌진흥청 난지농업연구소) ;
  • 이종언 (농촌진흥청 난지농업연구소) ;
  • 조인철 (농촌진흥청 난지농업연구소)
  • Published : 2005.03.01
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Abstract

This study was conducted to determine the effects of MgSO₄ supplement on meat quality and serum stress hormones concentrations in late finishing pigs. Sixty castrated Landrace pigs (average weight±S.D., 106.5±8.9 kg) were assigned to a control diet (without MgSO₄ supplement) and diet with MgSO₄(10 g/kg diet) supplemented. Pigs had free access to diets and water during five-day feeding period. At the end of feeding experiment, pigs were fasted for 16 hours and transported to commercial slaughter plant (30-minute transportation distance). After 2-hour lairage time, pigs were slaughtered, and blood samples were collected at bleeding procedure of slaughter. Pigs fed the diet with MgSO₄ supplement had higher (p<0.05) serum magnesium concentrations than those in pigs fed a control diet. Serum adrenaline, noradrenaline and cortisol concentrations determined at slaughter were not significantly different between dietary groups. Carcass temperature, pH at 24h post- slaughter, drip loss and color characteristics were not influenced (p>0.05) by short-term supplement of MgSO₄. Pigs fed the diet supplemented with MgSO₄ diet had lower PSE incidence (23.3%) compared to pigs fed the control diet (33%). These results indicate that short-term supplement of dietary MgSO₄ in late finishing pigs may not be beneficial in improving pork quality, and further study needs to assess feeding regime of magnesium supplement.

본 연구는 우리나라 도축장 현실에서 출하 전 마그네슘 단기 첨가 급여가 돈육 육질을 개선시키고 PSE 돈육 발생을 억제시킬 수 있는지를 구명하기 위하여 거세비육돈(Landrace) 60두를 대조구(MgSO₄ 무첨가구)와 MgSO₄ 급여구로 30두씩 나누어 도축 전 5일 동안 사료와 물을 무제한 급여하여 6일째 도축장으로 수송한 후 2시간 내에 도축하였다. 도축 전 MgSO₄ 첨가 급여는 도축 시 혈중 마그네슘 함량에 영향을 미치지 않았으며, 혈중 스트레스 관련 호르몬(adrenaline, noradrenaline) 역시 마그네슘 급여구와 대조구 사이에 차이가 없었다. 사후 초기 pH는 대조구가 더 높았고, 최종 pH는 유의적인 차이가 없었다. 사후 도체온도는 도축 직후 MgSO₄ 급여구가 더 높았으나 3시간과 6시간에는 비슷하였다. PSE 발생율은 대조구 30%, 마그네슘 급여구 23.3%로 마그네슘 급여구가 약간 낮은 경향을 보였으나 드립로스와 육색 명도에는 차이가 없었다. 비록 본 연구에 공시된 비육돈의 유전적 배경과 도축 전 비육돈의 취급방법이 기존 보고자들과 달랐지만 우리나라의 현실적인 여건을 고려할 때 마그네슘 첨가급여에 의해 돈육 육질을 개선하는 방법이 확립된다면 돼지 사육업자나 가공업자에게 큰 이익을 가져다줄 것이므로 마그네슘 효과를 극대화시킬 수 있는 방법을 찾아낸다면 경제적인 방법이 될 것으로 보인다.

Keywords

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