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http://dx.doi.org/10.7235/hort.2014.13121

Fruit Quality and Harvest Time of 'Heukboseok' Grape by Fruit Load  

Jung, MyungHee (Department of Integrative Plant Science, School of Bioresource and Bioscience, Chung-Ang University)
Kwon, YongHee (Pear Research Station, National Institute of Horticultural & Herbal Science, Rural Development Administration)
Lee, ByulHaNa (Department of Integrative Plant Science, School of Bioresource and Bioscience, Chung-Ang University)
Park, YoSup (Department of Integrative Plant Science, School of Bioresource and Bioscience, Chung-Ang University)
Park, Hee-Seung (Department of Integrative Plant Science, School of Bioresource and Bioscience, Chung-Ang University)
Publication Information
Horticultural Science & Technology / v.32, no.3, 2014 , pp. 289-295 More about this Journal
Abstract
This research was conducted to investigate a difference in quality according to control of fruit load and cluster weight when seeded 'Heukboseok' grape was grown in a conventional cultivation system. Clusters per vine were set to harvest 1,500 kg, 1,800 kg, and 2,200 kg grapes per $990m^2$. In p lots t reated t o produce 1,800 kg grapes, clusters were set to 3 grades produce grapes with 350 g, 500 g, and 700 g in cluster weight. Based on color chart (National Institute of Horticultural & Herbal Science, Rural Development Admnistration) which show maturation stage for 'Kyoho' grape, grapes with higher than grade 9 were harvested at 80 and 90 days after full bloom, and the r est of them were harvested a t 100 days after full bloom. The final yield of 'Heukboseok' grape was the lowest in target yield of 1,800 kg with 700 g clusters with 75.5% of target yield, but 92.1%-100.1% of target yield were harvested in other treatments. Among treatments with several fruit setting, 83.3% of grapes harvested in treatment to produce 1,500 kg grapes as a target yield at 90 days after full bloom. Among the treatments with different cluster weights, 93.5% grapes were harvested in the treatment with 350 g in cluster weight. 'Heukboseok' grape showed rapid maturation pattern with no significant difference in either soluble solids content or acidity between 90 days from 80 days after full bloom. Therefore, to prevent flesh softening, it is appropriate to harvest fruit at 90 days after full blooms, and both yield and cluster weight were important factors influencing the quality of the fruits in 'Heukboseok' grape. It is confirmed that coloring and firmness was influenced by the final yield and weight per cluster, respectively. Therefore, the yield should be set as grape of 1,500 kg per $990m^2$ in target yield, and cluster weight should be adjusted to 350 g to produce grape of 1,800 kg with the fruits of high quality. It is considered to be hard to produce grape of high quality with 700 g in cluster weight in 'Heukboseok' grape.
Keywords
cluster weight; fruit load; harvest rate; seeded fruit;
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Times Cited By KSCI : 6  (Citation Analysis)
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