수확 후 저장환경에 따른 수박줄기의 생리변화
Evaluation of Physiological Changes in Watermelon Stalk during Storage under Various Conditions of Treatments after Harvesting
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참고문헌
초록
저장환경에 따른 수박줄기의 변화를 조사하기 위해 수박을 수확한 후 저장온도를 7℃ 저온, 18℃ 실온, 30℃ 상온으로 하여 수박줄기의 시듦 현상을 조사하였다. 저장온도를 30℃의 상온으로 한 경우 수확 7일 이후, 18℃로 한 경우에는 수확 15일 이후, 그리고 7℃의 저온으로 한 경우에는 수확 19일 이후 완전히 시들었는데, 수박의 저장온도를 7℃의 저온으로 하였을 경우 수박줄기의 시듦 현상이 현저히 지연되었다. 저장온도에 따른 수박줄기의 수분함량도 비슷한 결과였는데, 저장온도를 30℃의 상온으로 한 결과, 수확 7일째에 수분함량이 21.1%로 감소하였다. 반면 저장온도를 7℃의 저온으로 한 경우 수분함량이 완만하게 감소하였는데 수확 19일째 71.2%를 나타내었다.상온에서 수박줄기의 시듦 현상을 지연시킬 수 있는 방안을 강구하고자 수박줄기에 몇 가지 처리를 하였는데, 수박줄기에 아무 처리를 하지 않은 대조구의 경우 수확 9일 이후에 완전히 시들었으며, 바셀린을 처리한 경우 수확 15일후, 대두유와 밀가루의 혼합제를 처리한 경우 수확 12일후 완전히 시들었는데, 대조구에 비해 3～6일 정도 시듦 현상을 지연시키는 효과는 있었으나 외관이 좋지 못하였다. 반면 접착 라벨지의 경우 대조구에 비해 약 3일 정도 시듦 현상을 지연시키는 효과가 있었으며, 접착 라벨지의 포장 효과로 인해 외관이 좋아지는 장점도 있어 상품성을 증대시키는 효과를 가져 왔다.
Abstract
In order to increase the storage stability of watermelon stalk, storage environments such as temperature and other treatments such as vaseline, mixture of soybean oil and wheat flour, and coated paper label were tested separately after harvesting. At different storage temperatures (7, 18 and 30℃) shelf-life of stalk was inversely proportional to temperature. The results showed that during storage at 30℃ they were completely wilted in 7 days, at 18℃ in 15 days and at 7℃ in 19 days. Our data also showed that stability of watermelon stalk depending on temperature was very closely correlated with water content of watermelon stalk; during storage at 30℃ the water content of watermelon stalk was decreased to 21.1% in 7 days, whereas at 7℃ the water content was decreased gradually to 71.2% for 19 days of storage. In order to reduce the physiological changes in watermelon stalk at 30℃, following treatments such as vaseline, mixture of soybean oil and wheat flour, and coated paper label were tested. As a result, watermelon stalk without any treatment was completely wilted in 9 days, while stalks treated with vaseline and mixture of soybean oil with wheat flour were wilted in 15 and 12 days, respectively. The wilt delay was noted in the watermelon stalk for 3~6 days during both treatments but the outward quality was found detracted, whereas when treated with coated paper label, the wilt of stalk was delayed for 3 days along with the improvement in the outward quality. Therefore this data indicate that the treatment of coated paper label during storage at 30℃ can be considered as a potent method for maintaining the physiology of watermelon stalk.
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