To harvest marketable cucumbers, high quality seedlings must be used. Producing seedlings in the greenhouse during the low radiation period decreases marketability due to insufficient light for growth. Supplemental lighting with artificial light of different quality can be used to improve low light conditions and produce high quality seedlings. Therefore, this study was conducted to select the appropriate supplemental light sources on the growth and seedling quality of grafted cucumber seedlings during the low radiation period. Three cultivars of cucumber were used as scions for grafting; ‘NakWonSeongcheongjang’, ‘Sinsedae’, and ‘Goodmorning baekdadagi’. Figleaf gourd (Cucurbita ficifolia) ‘Heukjong’ was used as the rootstock. The seeds were sown on January 26, 2023, and grafted on February 9, 2023. After graft-taking, cucumbers in plug trays were treated with RB light-emitting diodes (LED, red and blue LED, red:blue = 8:2), W LED (white LED, R:G:B = 5:3:2), and HPS (high-pressure sodium lamp), respectively. Non-treatment was used as the control. Supplemental lighting was applied 2 hours before sunrise and 2 hours after sunset for 19 days. The stem diameter and fresh and dry weights of roots did not differ significantly by supplemental light sources. The plant height and hypocotyl length were decreased in W LED. However, the leaf length, leaf width, leaf area, and fresh and dry weights of shoots were the highest in the RB LED. Seedling qualities such as crop growth rate, net assimilation rate, and compactness were also increased in RB LED and W LED. After transplanting, most of the growth was not significant, but early yield of cucumber was higher in LED than non-treatment. In conclusion, using RB LED, W LED for supplemental light source during low radiation period in grafted cucumber seedlings improved growth, seedling quality, and early yield of cucumber.

서 론
재료 및 방법
    1. 식물 재료
    2. 생육 환경 및 보광 처리
    3. 생육 및 묘소질 조사
    4. 조사 및 통계분석
결과 및 고찰
    1. 약광기 보광에 따른 접목묘 생육 비교
    2. 약광기 보광 처리에 접목묘 정식 후 생육 비교
적 요
사 사

• 최형은(경상국립대학교 응용생명과학부 대학원생) | Hyeong Eun Choi (Graduate Student, Division of Applied Life Science, Graduate School of Gyeongsang National University, Jinju 52828, Korea)
• 황소영(경상국립대학교 응용생명과학부 대학원생) | So Yeong Hwang (Graduate Student, Division of Applied Life Science, Graduate School of Gyeongsang National University, Jinju 52828, Korea)
• 윤지혜(경상국립대학교 응용생명과학부 대학원생) | Ji Hye Yun (Graduate Student, Division of Applied Life Science, Graduate School of Gyeongsang National University, Jinju 52828, Korea)
• 유진(경상국립대학교 응용생명과학부 대학원생) | Jin Yu (Graduate Student, Division of Applied Life Science, Graduate School of Gyeongsang National University, Jinju 52828, Korea)
• 황정훈(경상국립대학교 응용생명과학부 대학원생) | Jeong Hun Hwang (Graduate Student, Division of Applied Life Science, Graduate School of Gyeongsang National University, Jinju 52828, Korea)
• 박은원(경상국립대학교 응용생명과학부 대학원생) | Eun Won Park (Graduate Student, Division of Applied Life Science, Graduate School of Gyeongsang National University, Jinju 52828, Korea)
• 구정길(경상국립대학교 응용생명과학부 대학원생) | Jeong Kil Koo (Graduate Student, Division of Applied Life Science, Graduate School of Gyeongsang National University, Jinju 52828, Korea)
• 황희성(경상국립대학교 작물생산과학부 대학원생, 경상국립대학교 농업생명과학연구원 연구원) | Hee Sung Hwang (Graduate Student, Division of Crop Science, Graduate School of Gyeongsang National University, Jinju 52828, Korea, Researcher, Institute of Agriculture & Life Sciences, Gyeongsang National University, Jinju 52828, Korea)
• 황승재(경상국립대학교 농업생명과학대학 원예과학부 교수, 경상국립대학교 농업생명과학연구원 교수, 경상국립대학교 생명과학연구원 교수) | Seung Jae Hwang (Professor, Division of Horticultural Science, College of Agriculture & Life Sciences, Gyeongsang National University, Jinju 52828, Korea, Professor, Institute of Agriculture & Life Sciences, Gyeongsang National University, Jinju 52828, Korea, Professor, Research Institute of Life Science, Gyeongsang National University, Jinju 52828, Korea) Corresponding author