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Effects of the Mixing Ratio of Substrates and Cuttings on the Growth of Virus-free Sweetpotato Seedlings in Hydroponic Bag Culture  

Yoo, Kyoung-Ran (Division of Horticulture and Pet Animal-Plant Science, Wonkwang University)
Bae, Jong-Hyang (Division of Horticulture and Pet Animal-Plant Science, Wonkwang University)
Lee, Seung-Yeob (Division of Horticulture and Pet Animal-Plant Science, Wonkwang University)
Publication Information
Journal of Bio-Environment Control / v.20, no.3, 2011 , pp. 197-203 More about this Journal
Abstract
This experiment was carried out to investigate the growth characteristics of virus-free sweetpotato in hydroponic bag culture. The rooted one-node and upper-shoot cuttings of 'Yeonhwangmi' and 'Mannamiwere' transplanted into the plastic bag (0.5 mm of thickness, $W300{\times}L1,200{\times}H120mm$) culture system filled with commercial horticultural media (TKS-2, Flora Gard Co.) and cocopeat + perlite (3 : 7, 5 : 5, 7 : 3, (v/v). Nutrient solution of National Horticultural Research Station in Japan was separately irrigated $3times{\times}30minutes$ per day (10:00, 14:00 and 20:00 with timer control) by the drip irrigation. The growth of two varieties was not significantly different among four substrates in 15 days, but it was excellent in commercial horticultural media (TKS-2) and cocopeat 3 : perlite 7 (v/v) in 20 days. The growth in 'Yeonhwangmiwas' promoted than that in 'Mannami', and the upper-shoot cuttings of 'Yeonhwangmi' and 'Mannami' showed a significant vine elongation (over 10 and 2 cm, respectively) compared to the one-node cuttings. Fresh weight and dry weight in cocopeat 3 : perlite 7 (v/v) were significant increased than that in cocopeat 7 : perlite 3 (v/v). Therefore, the bag culture system filed with cocopeat 3 : perlite 7 (v/v) was successfully applied on propagation of virus-free sweetpotato seedling, and the result expected that the bag culture system could be commercialized without high financial costs for farmers.
Keywords
hose drip-irrigation; Ipomoea batatas; mixed substrates; vine elongation;
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Times Cited By KSCI : 4  (Citation Analysis)
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