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http://dx.doi.org/10.12791/KSBEC.2021.30.3.212

Bush Growth and Yield of Highbush Blueberry 'Duke' as Influenced by Different Pruning Times in Unheated Plastic House  

Cheon, Mi Geon (Research and Development Bureau, Gyeongnam Agricultural Research & Extension Services)
Lee, Seo Hyoun (Research and Development Bureau, Gyeongnam Agricultural Research & Extension Services)
Park, Kyung Mi (Research and Development Bureau, Gyeongnam Agricultural Research & Extension Services)
Choi, Seong-Tae (Research and Development Bureau, Gyeongnam Agricultural Research & Extension Services)
Hwang, Yeon Hyeon (Research and Development Bureau, Gyeongnam Agricultural Research & Extension Services)
Chang, Young Ho (Research and Development Bureau, Gyeongnam Agricultural Research & Extension Services)
Kim, Jin Gook (Department of Horticulture, College of Agriculture and Life Science, Gyeongsang National University)
Publication Information
Journal of Bio-Environment Control / v.30, no.3, 2021 , pp. 212-217 More about this Journal
Abstract
This experiment was conducted to compare effects of summer pruning at different times and dormant pruning on shoot growth and yield of northern highbush blueberry. Using 7 (2018) to 9 (2020) years old 'Duke' bushes grown in 180 L containers, summer pruning was treated on June 20 (around 30 days after harvest), July 20, and August 20 consecutively in both 2018 and 2019 removing 30% of the total woods, while dormant pruning (conventional) was on January 20 in both 2019 and 2020. Summer pruning reduced shoot growth the following year, especially when treated in late summer. Total shoot length per bush decreased to 47%, 37%, and 33% on October 15, 2020 in June, July, and August pruning, respectively, compared with that of dormant pruning. Summer pruning at different times in 2018 and 2019 did not affect berry characteristic in the following year. Yield per bush was not significantly changed in 2019, but it decreased by 21 to 38% in 2020 in the summer pruning treatments compared with 2.9 kg of the dormant pruning. It was concluded that consecutive summer pruning in 'Duke' under unheated plastic house could weaken the shoot growth with reducing yield.
Keywords
container culture; dormant pruning; hydroponics; summer pruning;
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