그린키위와 골드키위의 MA 저장에 적합한 비천공 Breathable 필름 종류와 저장온도 구명 = Identification of Suitable Film Type and Temperature for Green and Gold Kiwifruit MA Condition Using Non-Perforated Film

국문 초록 (Abstract)

그린키위 생체중 감소율은 8 와 상온저장 종료일에 모든 필름처리구에서 0.4% 이하의 감소를 보이며 수분 감소로 인한 품질저하는 나타나지 않았다. 8℃저장에서는 포장내 이산화탄소 농도가 CA 및 MA 적정 범위에 해당했던 필름은 20,000 cc였고, 20℃에서는 40,000 cc와 50,000 cc에서 6% 내외로 가장 낮았다. 저장 종료일의 에틸렌 농도는 8℃는 50,000 cc, 20℃는 40,000 cc가 가장 낮은 수치를 나타내었고, 외관상 품질은 8℃는 20,000 cc, 20 는 10,000 cc이 가장 높았으며, 이취는 8℃의 경우 50,000 cc가 가장 낮았다. 당도는 8℃에서 20,000 cc와 40,000 cc, 20℃는 40,000 cc가 높았다. 골드키위 생체중 감소율은 8℃와 20℃저장 종료일에 모든 필름이 0.6% 이하의 감소를 보이며 수분 감소로 인한 품질저하는 나타 나지 않았다. 필름내 대기조성은 8℃에 저장하였을 때 20,000 cc와 30,000 cc가 저장중 5% 내외의 이산화탄소 농도를 유지하였고, 20℃는 50,000 cc이 6% 내외로 가장 낮았다. 산소 농도는 8℃와 20℃ 저장 처리구 모두 최소 허용범위인 2% 이상의 농도를 보였다. 저장 종료일의 에틸렌 농도는 8℃와 20℃ 저장 처리구중 40,000 cc가 가장 낮았고, 외관은 8℃에서 5,000 cc, 20℃에서는 40,000 cc가 높았다. 이취는 8℃에서 50,000 cc가 가장 낮았으며, 당도는 8℃에서 40,000 cc, 20℃에서는 20,000 cc가 높았다. 따라서 20℃에서 저장기간은 7일 미만이였는데 필름 처리 구중에서는 에틸렌 농도와 당도, 외관상 품질을 종합해볼 때 그린키위와 골드키위 모두 40,000 cc가 적합하였다. 27일간 저장이 가능하였던 8℃는 이산화탄소 농도, 외관상 품질과 당도를 고려해 볼 때 그린키위와 골드키위는 20,000 cc가 적합하다고 판단된다.

다국어 초록 (Multilingual Abstract)

This study was carried out to identify of effectiveness on non-perforated breathable film types and storage temperature in green kiwifruits (Actinidia deliciosa var. Deliciosa Hayward) and gold kiwifruits (Actinidia chinensis var. Hort16A). Kiwifruits was made little ethylene gas during storage but it had higher sensitivity of ethylene. On these studies had applied two temperature stages and two storage periods as a 8℃ for 27 days and 20℃ for 7 days and these conditions had used six types of film as 5,000 cc, 10,000 cc, 20,000 cc, 30,000 cc, 40,000 cc, and 50,000 cc/m2·day·atm films. At the green kiwifruits, every film treatments and both temperatures had under 0.4% of fresh weight loss rate during storage, these result explained films and temperatures didn`t effected the quality by the lost of humidity during storage. The 20,000 cc film was satisfied CA and MA storage condition by carbon dioxide concentration at 8℃, but 40,000 cc and 50,000 cc films had lower carbon dioxide concentration as a 6% at 20℃. After 27 days storage at 8℃, 50,000 cc film had lowest concentration of ethylene, 20,000 cc film showed highest visual quality, off-flavor was lowest point at 50,000 cc film, and high contents of soluble solid appeared at 20,000 cc and 40,000 cc film. In the 20℃ storage after 7 days treats, 40,000 cc film had lowest concentration of ethylene, 10,000 cc film got the highest result of visual quality, and soluble solid contents was higher at 40,000 cc film. In the gold kiwifruits, every film treatments and both temperatures had less than 0.6% of fresh weight loss rate during storage. The loss of humidity at treated film packages didn`t change the quality. An atmosphere composition of storage at 8℃, carbon dioxide contents kept the 5% area at the 20,000 cc and 30,000 cc film. The 20℃ storage temperature had around 6% contents of carbon dioxide at 50,000 cc film. Oxygen contents took the over 2% at the 8℃ and 20℃ treats with every film types. Ethylene concentration after storage at 8℃ and 20℃ were highest at 40,000 cc film. Each 5,000 cc film and 40,000 cc film had higher visual quality of 8℃ and 20℃. The 50,000 cc film had best result on off-flavor in 8℃ condition, also 40,000 cc film had best soluble solid content in same temperature. As results, 8℃ and 20,000 cc non-perforated breathable film had been suitable condition of MA storage for green and gold kiwifruits in long term storage.