Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Effect of Modified Atmosphere Packaging on Postharvest Quality of Kohlrabi

콜라비의 수확 후 MA 포장에 따른 품질 유지 효과

  • Park, Me-Hea (Postharvest Research Team, National Institute of Horticultural & Herbal science) ;
  • Choi, Ji-Weon (Postharvest Research Team, National Institute of Horticultural & Herbal science) ;
  • Kim, Yong-Bum (Technology Services Division, National Institute of Horticultural & Herbal science) ;
  • Kim, Myeong-Hae (Postharvest Research Team, National Institute of Horticultural & Herbal science) ;
  • Won, Hee-Yeon (Postharvest Research Team, National Institute of Horticultural & Herbal science) ;
  • Shin, Sun-Young (Postharvest Research Team, National Institute of Horticultural & Herbal science) ;
  • Kim, Ji-Gang (Postharvest Research Team, National Institute of Horticultural & Herbal science)
  • 박미희 (국립원예특작과학원 저장유통연구팀) ;
  • 최지원 (국립원예특작과학원 저장유통연구팀) ;
  • 김용범 (국립원예특작과학원 기술지원과) ;
  • 김명회 (국립원예특작과학원 저장유통연구팀) ;
  • 원희연 (국립원예특작과학원 저장유통연구팀) ;
  • 신선영 (국립원예특작과학원 저장유통연구팀) ;
  • 김지강 (국립원예특작과학원 저장유통연구팀)
  • Received : 2014.02.08
  • Accepted : 2014.04.29
  • Published : 2014.10.31
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Abstract

The effect of modified atmosphere packaging (MAP) on kohlrabi (Brassica olerace L. gongulodes group)'s quality and antioxidant molecule during storage was examined to determine the optimal film package for maintaining freshness. To extend shelf life, MAP was tested using PE $50{\mu}m$ and oriented polypropylene (OPP) films with oxygen transmission rate (OTR) at 3,000, 10,000, $15,000mL/m^2/day/atm$. The OPP film packaging with modified oxygen transmission rate showed a delay in a weight loss and extended storage period. The package with OTR 3000 attained the desired gas composition of $O_2$ 3.2-6.7 kPa and $CO_2$ 13.1-19.8 kPa, in storage at room temperature. Kohlrabi stored in this package showed the lowest weight loss and the highest visual quality. Deterioration and off-odor were developed more rapidly in PE $50{\mu}m$ towards the end of the storage at room temperature. However, there are no differences among OTR films in visual quality and off-odor until 60 days at cold storage. Vitamin C content of kohlrabi was reduced rapidly in OTR 15000 with high transmission rate and showed less loss in PE $50{\mu}m$ and OTR 3000 in both room temperatures and cold storage. Results revealed that an OPP film with OTR 3000 extended the shelf life of kohlrabi in storage with maintained quality and vitamin C.

콜라비의 선도유지를 위한 적정 MA 포장재를 구명하기 위해 품질과 비타민 C 함량에 있어서의 MA 포장의 영향을 조사하였다. 콜라비의 저장수명을 연장하기 위한 MA 포장재는 $50{\mu}m$ PE와 OPP에 산소투과율(OTR) 3,000, 10,000, $15,000mL/m^2/day/atm$으로 조성된 필름을 사용하였다. 산소투과율을 조정한 포장재들이 콜라비의 중량 손실과 부패를 지연하고 저장 기간을 연장하는 효과가 있었다. 특히, OTR 3000 포장은 상온저장기간 동안 이상적인 가스 조성인 3.2-6.7kPa $O_2$ + 13.1-19.8kPa $CO_2$을 유지했으며, 이 포장재로 저장된 콜라비가 가장 낮은 중량감소율과 높은 외관지수를 보였다. $50{\mu}m$ PE 포장은 부패와 이취가 저장말기로 갈수록 급속히 발생하였다. 콜라비를 저온저장 할 경우에는 MA 포장간의 외관 품질에서의 유의적 차이는 나타나지 않았다. 콜라비의 비타민 C 함량은 상온 및 저온저장기간 동안 높은 투기율을 가진 OTR 15000 포장이 손실이 가장 컸고, $50{\mu}m$ PE와 OTR 3000 포장이 손실이 낮았다. 본 연구결과, OPP 필름에 OTR 3000으로 조성된 포장재를 사용하는 것이 콜라비의 품질과 비타민 C 함량 유지를 수반한 저장 수명 연장에 가장 효과적인 것으로 밝혀졌다.

Keywords

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