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http://dx.doi.org/10.12791/KSBEC.2013.22.1.043

Effect of Different Day Length on the Production of Onion (Allium cepa L.) Set  

Ahn, Su Ran (Department of Horticulture, Kyungpook National University)
Suh, Jun Kyu (Department of Horticulture, Kyungpook National University)
Publication Information
Journal of Bio-Environment Control / v.22, no.1, 2013 , pp. 43-47 More about this Journal
Abstract
This study was conducted to develop the most effective method in promoting onion set in cultivars 'Josaengsseondebol' and 'Daeji' for all year-round production. This was done by extending the day length for 41 days. For both cultivars, the period to reach the maximum number of leaves developed was shortened as the exposure to day length increased. Between the two cultivars, 'Josaengsseondebol' reaches its maximum leaf formation for a shorter duration compared with 'Daeji'. In effect to bulb size, cultivar 'Josaengsseondebol' having a night break of 1, 2, and 16 hours light condition had better bulb enlargement compared with the non-treated bulbs. In the case of cultivar 'Daeji', only bulbs exposed to a night break of 2 and 16 hours light condition had better bulb enlargement. The percentage of marketable set yield in cultivar 'Josaengsseondebol' having a night break of 1 hr, 2 hrs, 16 hrs light condition, and control or untreated bulbs were 84%, 92%, 90%, and 6% respectively. In the case of cultivar 'Daeji', treated with a night break of 1 hr, 2 hrs, 16 hrs light condition, and untreated bulbs had a percentage marketable set yield of 7%, 55%, 64%, and 0% respectively. Based on these results, it is therefore concluded that night break treatment is considered to be effective method in promoting off-season onion set cultivation in cultivar 'Josaengsseondebol'.
Keywords
bulb shape index; cultivar; marketable set yield; night break;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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