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KMID : 0903519970400020117
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
1997 Volume.40 No. 2 p.117 ~ p.122
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Cold Stroage Characteristics of Early Variety of Citrus unshiu Produced in Cheju with Various Treatments
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양영택/Yang, Young Taek
김성학/고정심/송상철/김지용/Kim, Seong Hak/Koh, Jeong Sam/Song, Sang Cherl/Kim, Ji Yong
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Abstract
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The conditions of cold stroage of Citrus unshiu Marc. var. miyagawa produced in Cheju were investigated. Compared to the citrus fruits stored at room temperature, the content of soluble solids, total sugar, vitamin C and specific gravity decreased slightly on the fruits stored at 4℃ and 87% relative humidity. Decay ratio and weight loss were below 10% on keeping freshness relatively till late of March during cold storage. Weight loss, decrease of firmness and soluble solids occurred gradually during cold storage. Nevertherless seal-packaging with 0.02 ㎜ LDPE film or wax-coating of citrus fruits were effective on weight loss and appearance, decay ratio increased for long-term storage. It was needed to control humidity in cold chamber for preventing from decay and weight loss. Edible part ratio was decreased gradually by respiration, and peel and tissue of fruits were softened slightly by 60 days of cold storage. Decay ratio and weight loss of full-ripened citrus fruits were little during the storage for 100 days, compared to the fruits harvested early. Appearance and taste of citrus fruits stored for 4 month were good relatively, but decay occurred rapidly on seal-packaging fruits putting out of cold room for a few days. Because of the difficulty of long-term storage for early variety of Citrus unshiu, the conditions and periods of cold storage would be determined after considering the physicochemical properties of fruits.
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