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Freshness Comparison of 'Mats-Kyeong-chae' in Accordance with Packaging Treatments and Storage Temperatures

'맛경채'의 포장방법과 저장온도에 따른 선도 비교

  • Lee, KwanHo (Korea National College of Agriculture and Fisheries) ;
  • Jang, Suk-Woo (National Institute of Horticultural & Herbal Science, RDA) ;
  • Park, Suhyoung (National Institute of Horticultural & Herbal Science, RDA) ;
  • Ahn, Yul Kyun (Korea National College of Agriculture and Fisheries) ;
  • Lee, Jung-Soo (National Institute of Horticultural & Herbal Science, RDA)
  • Received : 2018.11.06
  • Accepted : 2018.12.24
  • Published : 2018.12.31

Abstract

'Mats-kyeong-chae (Brassica lee ssp. namai cv. Tongssamchoo)', a new type of sweet Korean cabbage for fresh wrapping and soup cooking, was released by the Korea National College of Agriculture and Fisheries. The shelf-life and quality changes of this new cultivar was evaluated by packaging with PP (polypropylene) film bag and storing at three temperatures ($5^{\circ}C$, $15^{\circ}C$, and $25^{\circ}C$). As control, the cabbage was packaged in a corrugated paper box and stored at $25^{\circ}C$. At the storage temperature of $5^{\circ}C$, the degree of freshness, weight loss, hue angle and SPAD on cabbage packaged with PP film bag maintained its good quality and exhibited a longer period of marketable life compared to the samples stored in other treatments. Results showed that the use of PP film packaging and storing at $5^{\circ}C$ could be the optimum condition for commercial storage of 'Mats-kyeong-chae'. Further investigation on other quality parameters according to different packaging methods would be useful in maintaining the quality of 'Mats-kyeong-chae' at postharvest stages.

새로이 품목으로 육성된 '맛경채'의 수확 후 저장 특성을 보고자, 상온($25^{\circ}C$)에서 관행적으로 유통되는 골판지 종이박스로 저장하면서 유공 PP 필름 포장과 비교하였으며 동일한 필름 소재로 $5^{\circ}C$$15^{\circ}C$로 저장하여, 저장 중의 외관변화, 생체중량 감소, 색소와 색상차, 호홉 등을 측정하였다. '맛경채'는 상온인 $25^{\circ}C$에서 4일 정도까지 상품성을 유지하였는데, 상품성 지수에서 유공 PP 필름 포장이 골판지 종이박스 포장보다 다소 높았으며, 또한 유공 PP 필름 포장하여 저장온도를 달리하면 $5^{\circ}C$에서는 24일까지 상품성을 유지하였고, $15^{\circ}C$에서는 8일간이었다. 이는 SPAD와 같은 색소 함량이나 Hue angle과 같은 색상변화에서도 온도별로 같은 결과를 보여주었다. 포장 방법에 따른 차이는 상온($25^{\circ}C$)에서 관행적으로 저장 유통되는 골판지 종이 박스 포장과 유공 PP필름의 소포장을 비교하였는데 외관 변화에서는 차이가 없었으나, 생체중량이나 색소 및 색상에서 차이를 보여, 필름에 의한 소포장 효과가 인정되었다. 온도에 따라서 저온 저장이 다른 온도 조건보다 선도를 더 유지할 수 있는 것은 생체중량이나 호흡과 같이 저장 온도가 낮은 $5^{\circ}C$에서 중량 변화나 호흡이 낮아 선도 변화가 지연된 것으로 보인다. 본 실험에서 '맛경채'와 같은 엽채류의 품질을 유지하기 위해서는 저온 $5^{\circ}C$와 같이 낮은 온도에서 저장 유통하는 것이 효과적이며, 또한 필름 포장에 소포장하는 것이 부가적으로 선도가 유지되는 것으로 나타나, 필름 포장과 함께 저온에서 저장 유통하여 상품성을 관리해야 될 것으로 보인다.

Keywords

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