This study was conducted to evaluate the growth and quality of grafted watermelon seedlings under different controlled light intensities in a plant factory nursery system. The watermelon scion cultivars were used ‘BravoKkul (BK)’ for the high-temperature season and ‘SantaKkul (SK)’ for the low-temperature season. For rootstocks, ‘BullojangSaeng (BS)’ was used for the high-temperature season and ‘DongjangGun (DG)’ for the low-temperature season. Light intensity treatments were applied 125 ± 25, 225 ± 25, and 325 ± 25 μmol·m-2·s-1. The highest plant height was observed at 125 ± 25 μmol·m-2·s-1 for the high-temperature season grafted seedlings (BK+BS) and at 225 ± 25 μmol·m-2·s-1 for the lowtemperature season grafted seedlings (SK+DG). Both BK+BS and SK+DG seedlings showed the largest stem diameter and highest number of nodes at 225 ± 25 μmol·m-2·s-1. Root length and leaf area were greatest at 325 ± 25 μmol·m-2·s-1 for BK+BS and at 225 ± 25 μmol·m-2·s-1 for SK+DG. Shoot and root fresh and dry weights were highest at 225 ± 25 μmol·m-2·s-1 during both high- and low-temperature seasons. The compactness of seedlings increased with higher light intensities in both cultivars, particularly noticeable in BK+BS. Leaf area ratio (LAR) significantly increased with increasing light intensity in BK+BS but showed no significant difference in SK+DG. Overall, the growth characteristics were optimal at 225 ± 25 μmol·m-2·s-1, although considering seedling quality, more robust seedlings were produced at 325 ± 25 μmol·m-2·s-1.

본 연구는 식물공장형 육묘시스템에서 광도 조절에 따른 수 박 접목묘의 생육 및 품질을 평가하기 위해 수행되었다. 수박 접수는 고온기 품종 ‘부라보꿀(BK)’, 저온기 품종 ‘산타꿀 (SK)’을 사용하였고, 대목으로 고온기 품종 ‘불로장생(BS)’, 저온기 품종 ‘동장군(DG)’을 사용하였다. 광도는 125 ± 25, 225 ± 25 및 325 ± 25μmol·m-2·s-1 3처리로 조정하여 실험을 진행하였다. 초장은 고온기 접목묘가 125 ± 25μmol·m-2·s-1, 저온기 접목묘가 225 ± 25μmol·m-2·s-1에서 가장 높았고, 줄 기 직경과 마디수는 고온기 접목묘, 저온기 접목묘 모두 225 ± 25μmol·m-2·s-1에서 가장 높았다. 근장과 엽면적은 고온기 접 목묘에서 325 ± 25μmol·m-2·s-1, 저온기 접목묘는 225 ± 25 μmol·m-2·s-1에서 가장 높았다. 또한 지상부 및 지하부 생체중 과 건물중은 225 ± 25μmol·m-2·s-1 처리에서 가장 높게 나타 났다. 충실도는 두 품종 모두 광도가 증가함에 따라 높아졌으 며, 특히 고온기 접목묘에서 그 효과가 두드러졌다. 엽면적비 (LAR)는 고온기 접목묘에서 광도 증가와 함께 유의하게 증가 하였으나, 저온기 접목묘에서 유의한 차이가 없었다. 종합적 으로 생육 특성은 225 ± 25μmol·m-2·s-1에서 높았으나, 묘소 질을 고려했을 때 325 ± 25μmol·m-2·s-1에서 더욱 강건한 묘 가 형성된 것으로 판단된다.

Abstract
서 론
재료 및 방법
    1. 실험재료 및 식물공장 육묘시스템 내 환경
    2. 광도
    3. 생육조사 항목 및 측정방법
    4. 통계 분석
결과 및 고찰
적 요
사 사
Literature Cited

• 나해영(국립목포대학교 생명, 의과학대학 원예산림학부 교수) | Haeyoung Na (Professor, Department of Horticulture and Forestry, College of Life and Medical Sciences, Mokpo National University, Muan 58554, Korea) Corresponding author
• 이범선(국립순천대학교 그린스마트팜스쿨 원예학과 교수) | Beom Seon Lee (Professor, Department of Horticulture, School of Green Smart Farm, Sunchon National University, Sunchon 57922, Korea)
• 김영제(국립목포대학교 일반대학원 원예학과 대학원생) | Young Je Kim (Graduate Student, Department of Horticultural Science, Graduate School of Mokpo National University, Muan 58554, Korea)
• 김은지(국립목포대학교 일반대학원 생명자원개발이용학협동과정 대학원생) | Eun Ji Kim (Graduate Student, Interdisciplinary Program of Development and Utilization of Biological Resources, Graduate School of Mokpo National University, Muan 58554, Korea)
• 주세훈(국립목포대학교 일반대학원 생명자원개발이용학협동과정 대학원생) | Se Hun Ju (Graduate Student, Interdisciplinary Program of Development and Utilization of Biological Resources, Graduate School of Mokpo National University, Muan 58554, Korea)
• 고윤(국립목포대학교 일반대학원 원예학과 대학원생) | Yoon Go (Graduate Student, Department of Horticultural Science, Graduate School of Mokpo National University, Muan 58554, Korea)