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2025 Vol.34, Issue 4 Preview Page

Original Articles

Impact of Supplemental LED Lighting Regimes on Sweet Pepper Growth under Winter Light Deficit

겨울철 광 부족 조건에서 LED 보광 기간이 파프리카 생장에 미치는 영향

Tae Kyeong Jeong1
,
Sang Rim Kim1
,
Faraaz Ahmed Mohammad1
,
Mac Cheryl Sulan Charles Emparang1
,
Ji Gu Lee1
,
Jum Soon Kang2*
정 태경1
,
김 상림1
,
모함마드 파라즈 아흐메드1
,
엠파랑 맥 셰릴 술란 찰스1
,
이 지구1
,
강 점순2*
1Graduate student, Department of Horticultural Bioscience, Pusan National University, Miryang 50463, Korea
2Professor, Department of Horticultural Bioscience, Pusan National University, Miryang 50463, Korea
1부산대학교 원예생명과학과 대학원생
2부산대학교 원예생명과학과 교수
*Corresponding Author
31 October 2025. pp. 647-660
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Abstract

This study investigated the effects of supplemental LED lighting regime (morning, afternoon, and all-day) on the vegetative growth, reproductive development, yield, and water-soluble vitamin content of sweet pepper (Capsicum annuum L.) grown in winter season under deficit sunlight hours. Supplemental lighting regimes included morning lighting from 05:00 to 10:00 (T1), afternoon lighting from 16:00 to 21:00 (T2), all-day lighting for 16 hours from 06:00 to 22:00 (T3), and a control with no supplemental lighting (T0). Results demonstrated that morning lighting (T1) significantly enhanced plant height, leaf length, number of leaves and leaf area, indicating effective promotion of vigorous vegetative growth during early development. In contrast, all-day lighting (T3) reduced vegetative growth but significantly increased stem diameter, node length to first flower, and fruit set, suggesting facilitation of the transition to reproductive growth. Accordingly, T3 resulted in significantly higher cumulative yield and fruit weight compared to the control, with a marketable fruit rate of 92.0%. Afternoon lighting (T2) showed positive effects on overall growth and yield, particularly contributing to increased fruit size during the enlargement stage. Analysis of fruit water-soluble vitamins revealed distinct responses to lighting periods: T1 elevated vitamins B1 and B5 contents, while T3 markedly increased vitamin B2 concentration. Vitamin C content was highest in T3 and T0, possibly reflecting physiological stress and antioxidant accumulation under differing light environments. These findings suggest that a growth stage specific supplemental lighting strategy such as morning lighting to maintain vegetative vigor during early growth and all-day lighting to enhance reproductive growth and yield can optimize sweet pepper production under winter light deficit conditions in a greenhouse.

Keywords
Capsicum annuum
Fruit quality
Photosynthetic activity
Supplemental lighting
Vitamin content

본 연구에서는 겨울철 일조량이 부족한 환경에서 재배된 파프리카(Capsicum annuum L.)를 대상으로, 조조(05:00–10:00, T1), 오후(16:00–21:00, T2), 전일(06:00–22:00, T3) LED 보광 처리 기간이 초기 생육, 생식 발달, 수량 및 수용성 비타민 함량에 미치는 영향을 평가하였다. 조조 보광(T1)은 초장, 엽장, 엽수 및 엽면적을 유의적으로 증가시켜 초기 단계에서 활발한 영양생장을 유도하였다. 반면 전일 보광(T3)은 초장 신장을 억제하였으나, 줄기 직경, 첫 개화 마디 길이 및 과실 착과율을 증가시켜 생식기로의 전환을 촉진하였다. 그 결과 T3 처리구는 대조구 대비 누적 수량과 과실 중량이 유의하게 높았으며, 상품과율은 92.0%에 달했다. 오후 보광(T2)은 전체적인 생육 지표와 수량을 개선하였으며, 특히 과실 비대기에 과실 크기 증가에 기여하였다. 과실의 수용성 비타민 분석에서는, T1이 비타민 B1과 B5 함량을 증가시켰고, T3은 비타민 B2 함량을 크게 높였다. 비타민 C는 T3과 무처리(T0)에서 가장 높게 나타났는데, 이는 서로 다른 광 환경에서 유도된 생리적 스트레스와 항산화 물질 축적에 따른 것으로 해석된다. 본 연구 결과는 생육 단계별로 차별화된 LED 보광 전략의 유효성을 보여준다. 즉, 초기 생육기에는 초장 생장을 유지하기 위한 조조 보광이, 이후 생식기로의 전환과 수량 증대를 위해서는 전일 보광이 적합하며, 이는 겨울철 광 부족 환경에서 파프리카 생산성을 향상시키는 데 기여할 수 있다.

키워드
과실 품질
광합성 활성
보광
비타민 함량
파프리카
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Information
  • Publisher :The Korean Society for Bio-Environment Control
  • Publisher(Ko) :(사)한국생물환경조절학회
  • Journal Title :Journal of Bio-Environment Control
  • Journal Title(Ko) :생물환경조절학회지
  • Volume : 34
  • No :4
  • Pages :647-660
  • Received Date : 2025-09-29
  • Revised Date : 2025-10-30
  • Accepted Date : 2025-10-31
  • DOI :https://doi.org/10.12791/KSBEC.2025.34.4.647
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