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초록· 키워드

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‘Superior’ potato (Solanum tuberosum L.) is the most predominant cultivar for ware production occupying more than 60% in Korea. The basic seed tubers are produced by meristem-tip culture followed by hydroponics. To investigate the growth patterns of this cultivar including tuber number, size, and quality under hydroponics, potato tubers were sampled at 60, 70, 80, and 90 days after transplanting (DAT), and were sorted by fresh weight into six classes of tuber size: 1?5, 5?10, 10?20, 20?30, 30?50, and ≥ 50 g. Compared with the conventional harvesting date (90 DAT), the earlier harvests at 70 or 80 DAT increased the number of tubers in the range of 5?30 g. The total number of tubers produced per plant remained similar. However, total tuber weight per plant significantly decreased in earlier harvests. Specific gravity increased with the tuber size up to 10 g, but the difference between 10 and 50 g tubers was not significant. The specific gravity increased over time to 90 DAT. Shoot growth was maximum at the early harvesting date (60 or 70 DAT) and declined thereafter. Except for tubers from 60 DAT, the dormant period of early harvest tubers was not different with that of late harvest tubers of 90 DAT. These results clearly represented an economic advantage of early harvesting of 70 or 80 DAT because of cost reduction in hydroponics.

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Abstract
Introduction
Materials and Methods
Results and Discussion
Acknowledgements
Literature Cited

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UCI(KEPA) : I410-ECN-0101-2009-525-016909110