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Research Article

Effect of Packaging Method on Quality and Storability of Head Lettuce

포장방법이 결구 상추의 품질과 저장성에 미치는 영향

Joo Hwan Lee1
,
Dam Hee Choi1
,
Yoo Han Roh2
,
In-Lee Choi34
,
Ho-Min Kang5*
이 주환1
,
최 담희1
,
노 유한2
,
최 인이34
,
강 호민5*
1Graduate Student, Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon 24341, Korea
2Undergraduate Student, Department of Horticulture, Kangwon National University, Chuncheon 24341, Korea
3Post Doctor, Department of Horticulture, Kangwon National University, Chuncheon 24341, Korea
4Researcher, Agricultural and Life Science Research Institute, Kangwon National University, Chuncheon 24341, Korea
5Professor, Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon 24341, Korea
1강원대학교 스마트농업융합학과 대학원생
2강원대학교 원예학과 학부생
3강원대학교 원예학과 박사후 연구원
4강원대학교 농업생명과학연구원 선임연구원
5강원대학교 스마트농업융합학과 교수
*Corresponding Author
31 December 2021. pp. 250-261
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Abstract

In this study, corrugated box; perforated film; and 1300 cc, 40,000 cc, and 80,000 cc·m-2·day-1·atm-1 oxygen transmission rate (OTR) films were set up as experimental groups and stored at 2 °C (80% ± 5% RH) for 25 days; thereafter, the packaging method and OTRs of the films were compared. The fresh weight loss rate during storage was directly proportional to the OTR in the package. The lower the OTR, the more significantly the gas composition in the package increased or decreased, and the ethylene concentration increased until the 20th after storage, and decreased until the last day. Film packaging was better than corrugated box packaging, with 40,000 cc exhibiting the highest score. On the final date of storage, firmness was inconsistent with the OTR, and no color difference was observed between treatments. Off-odors decreased with higher OTRs and reached the lowest value with 40,000 cc among the modified atmosphere(MA) packaging treatments. Additionally, exterior browning exhibited the lowest increase with 40,000 cc up to 35%, with all treatments showing an increase in browning compared to the initial color. In contrast, browning of the interior exhibited highest rate of decline with 40,000 cc up to 30%. DPPH radical scavenging ability was lower than that observed initially for both exterior and interior browning. Among the MA packaging treatments, the reduction rate was low with 40,000 cc followed by 80,000 cc and 1300 cc. Vitamin C also saw all but the exterior of corrugated box, decreased compared to the initial levels, with 40,000 cc showing the lowest reduction. Therefore, 40,000 cc OTR films are considered suitable for packaging and extending the shelf life of head lettuce during storage.

Keywords
Browning index
Head lettuce
Modified atmosphere
Oxygen transmission rate
Visual quality

본 연구는 골판지 상자 및 유공필름을 대조군, 1,300 cc, 40,000 cc, 80,000 cc·m-2·day-1·atm-1 OTR(Oxygen transmission rate) 필름을 실험군으로 설정하고 2°C(80 ± 5%RH)에서 25일 동안 저장하여, 포장 방법 및 필름의 산소투과율에 따른 결구상추의 저장성 및 품질을 비교하기 위해 수행하였다. 저장 중 생체중 감소율은 포장의 산소투과율과 정비례했다. 포장 내 산소 및 이산화탄소 농도는 산소투과율이 낮을수록 대기의 기체조성 대비 증감의 변화가 컸으며, 에틸렌 농도는 저장 20일차까지 서서히 증가하다 최종일에 감소했다. 외관은 필름 포장한 것이 골판지 상자보다 좋았으며, 그 중 40,000 cc가 가장 높은 점수를 보였다. 저장 최종일 경도는 산소투과율에 따른 일정한 경향이 없었으며, 색도는 처리구간 차이가 없었다. 이취는 산소투과율이 높을수록 적어지는 경향을 보였으며 MA 포장 처리구 중에서는 40,000 cc에서 가장 적었다. 겉잎과 속잎으로 구분하여 조사한 항목 중 갈변도의 겉잎은 초기값 대비 모든 처리구가 증가했고, 속잎은 겉잎과는 반대의 경향을 보였지만, 겉잎과 속잎 모두 40,000 cc에서 가장 낮은 낮았다. DPPH 라디컬 소거능은 겉잎과 속잎 모두 초기값보다 감소하였으며, MA 포장 처리구 중에서는 40,000 cc, 80,000 cc 그리고 1,300 cc 순으로 감소율이 낮았다. 비타민 C 또한 골판지 상자 처리구의 겉잎을 제외하고는 모든 처리구가 초기값보다 감소했으며, 40,000 cc가 MA 포장 처리구 중에서 초기값 대비 가장 낮은 감소율을 나타냈다. 따라서 양상추 저장 중 유통기한을 연장함에 있어서 40,000 cc OTR 필름을 사용해 포장하는 적합한 것으로 판단된다.

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Information
  • Publisher :Agriculture and Life Sciences Research Institute, Kangwon National University
  • Publisher(Ko) :None
  • Journal Title :Journal of Agricultural, Life and Environmental Sciences
  • Volume : 33
  • No :3
  • Pages :250-261
  • Received Date : 2021-07-29
  • Revised Date : 2021-08-17
  • Accepted Date : 2021-08-19
  • DOI :https://doi.org/10.22698/jales.20210025
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