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Changes in Growth and Yield of Strawberry (cv. Maehyang and Seolhyang) in Response to Defoliation during Nursery Period  

Kim, Dae-Young (National Institute of Horticultural & Herbal Science, RDA)
Kim, Tae-Il (Chungchongnam-do Agricultural Research and Extension Services)
Kim, Woon-Seop (Chungchongnam-do Agricultural Research and Extension Services)
Kang, Yun-Im (National Institute of Horticultural & Herbal Science, RDA)
Yun, Hyung-Kweon (National Institute of Horticultural & Herbal Science, RDA)
Choi, Jong-Myung (Department of Horticulture, Chungnam National University)
Yoon, Moo-Kyung (National Institute of Horticultural & Herbal Science, RDA)
Publication Information
Journal of Bio-Environment Control / v.20, no.4, 2011 , pp. 283-289 More about this Journal
Abstract
This study was conducted to examine the effects of defoliation treatment on the growth and yield of strawberry ($Fragaria{\times}ananassa$ cv. Maehyang and Seolhyang) during nursery period. Leaves of strawberry plantlet had been removed except two, three and four fully expanded leaves until planting date. As the intensity of defoliation was strong, the petiole length was reduced and overgrowth of strawberry plantlet was suppressed. Outer diameter of crown in defoliation treatments significantly decreased but inner diameter of crown was not significant. Number of primary roots of the 3 leaves or 4 leaves defoliation treatment generally tended to increase, but there was not significantly different among treatments. Fresh weight and leaf area in the defoliation treatments significantly decreased and the root weight were higher in partial 3 leaves or 4 leaves defoliation treatment but was not significantly different among treatments. Because T/R ratio decreased significantly as growth inhibition of above-ground part compared to underground part, it is considered easy to take rooting after plantlet plating. As the intensity of defoliation was strong, chlorophyll contents tended to decrease significantly. Reduction of the endogenous nitrogen by defoliation effectively led to promote floral differentiation at low temperature and short day condition. This promoted timing of budding and flowering and also induced uniform flowering after plantlet planting. Marketable fruit yield of 3 leaves defoliation treatment tended to be higher than the control.
Keywords
$Fragaria{\times}ananassa$; flowering; nursery method; plantlet quality; T/R ratio;
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Times Cited By KSCI : 1  (Citation Analysis)
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