가온 재배 시 "피오네" 포도( Vitis vinifera × V. labrusca)의 엽과비에 따른 과실 특성

• Published in: Hanguk hwangyeong nonghak hoeji Vol. 33; no. 1; pp. 57 - 62
• Main Authors: 윤석규, Seok Kyu Yun, 박서준, Seo Jun Park, 정성민, Sung Min Jung, 김정배, Jung Bae Kim, 윤익구, Ik Koo Yoon, 남은영, Eun Young Nam, 유덕준, Duk Jun Yu, 이희재, Hee Jae Lee
• Format: Journal Article
• Language: Korean
• Published: 한국환경농학회 30.03.2014
• Subjects: Anthocyanin content; Cultivation with heating; Grapevine; Leaf to fruit ratio; 농학; Leaf to fruit ratio; Anthocyanin content; Grapevine; Cultivation with heating
• ISSN: 1225-3537; 2233-4173
• DOI: 10.5338/KJEA.2014.33.1.57

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.