가온 재배 시 "피오네" 포도( Vitis vinifera × V. labrusca)의 엽과비에 따른 과실 특성
BACKGROUND: Defoliation in grapevine cultivation is practically used to improve light environment within the canopy and thereby fruit quality. Effects of defoliation in five-year-old ‘Pione’ grapevine during cultivation with heating were investigated to find out optimum ratio of leaf area to fruit c...
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Published in | Hanguk hwangyeong nonghak hoeji Vol. 33; no. 1; pp. 57 - 62 |
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Main Authors | , , , , , , , , , , , , , , , |
Format | Journal Article |
Language | Korean |
Published |
한국환경농학회
30.03.2014
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Subjects | |
Online Access | Get full text |
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Summary: | BACKGROUND: Defoliation in grapevine cultivation is practically used to improve light environment within the canopy and thereby fruit quality. Effects of defoliation in five-year-old ‘Pione’ grapevine during cultivation with heating were investigated to find out optimum ratio of leaf area to fruit cluster weight (L/F). METHODS AND RESULTS: The grapevines were defoliated with berry-thinning 20 days after full bloom to provide various levels of L/F. At harvest, total leaf area values of fruit bearing branches were between 0.23 and 0.60 m2. With increasing L/F, soluble solids and anthocyanin contents curvilinearly increased (R2 = 0.76**). At L/F over 0.6 m2/kg, soluble solids content (SSC) leveled off. With increasing L/F, titratable acidity (TA) linearly decreased (R2 = 0.87**), but the ratio of SSC to TA linearly increased (R2 = 0.86**). Anthocyanin content was significantly 57 correlated with SSC and the ratio of SSC to TA (R2 = 0.80** and 0.82**, respectively). When total leaf area per fruit bearing branch was maintained 0.40 m2, soluble solids and anthocyanin contents linearly decreased (R2 = 0.79** and 0.85**, respectively), but TA linearly increased with increasing fruit cluster weight (R2 = 0.70**). Fruit was low in quality when the L/F was below 0.6 m2/kg. CONCLUSION: L/F is recommended to be maintained at least 0.6 m2/kg in ‘Pione’ grapevine during cultivation with heating to produce higher-quality fruits. |
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Bibliography: | The Korean Society of Environmental Agriculture KISTI1.1003/JNL.JAKO201411560020442 www.korseaj.or.kr G704-000935.2014.33.1.010 |
ISSN: | 1225-3537 2233-4173 |
DOI: | 10.5338/KJEA.2014.33.1.57 |