Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Long-term Elevated Temperature Affects the Growth and Quality of 'Shiranuhi' Mandarin Grown in a Green House

장기간 온도상승이 시설재배 '부지화'의 수체 생장 및 과실 품질에 미치는 영향

  • Misun Kim (Citrus Research Institute, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Young-Eel Moon (Citrus Research Institute, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Sang Suk Kim (Citrus Research Institute, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Jaeho Joa (Citrus Research Institute, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Seok Kyu Yun (Climate Change and Agriculture, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • YoSup Park (Citrus Research Institute, National Institute of Horticultural & Herbal Science, Rural Development Administration)
  • 김미선 (농촌진흥청 국립원예특작과학원 감귤연구소) ;
  • 문영일 (농촌진흥청 국립원예특작과학원 감귤연구소) ;
  • 김상숙 (농촌진흥청 국립원예특작과학원 감귤연구소) ;
  • 좌재호 (농촌진흥청 국립원예특작과학원 감귤연구소) ;
  • 윤석규 (농촌진흥청 국립원예특작과학원 온난화대응농업연구소) ;
  • 박요섭 (농촌진흥청 국립원예특작과학원 감귤연구소)
  • Received : 2022.10.07
  • Accepted : 2022.12.20
  • Published : 2022.12.31
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Abstract

BACKGROUND: The mean annual temperature of the Korean Peninsula will continue to rise due to global warming. 'Shiranuhi' mandarin-a late-harvest cultivar-is primarily cultivated in plastic greenhouses where high temperatures cannot be directly avoided. Therefore, growth and fruit quality changes under elevated temperatures must be investigated. METHODS AND RESULTS: Elevated temperatures were divided into three groups [2℃ (T-I), 4℃ (T-II), and 6℃ (T-III) above the ambient temperature] during the 2019-2020 season. Mean temperatures were 17.1℃, 18.6℃, and 20.2℃ in T-I, T-II, and T-III, respectively. The bud bursts in T-II and T-III were earlier than that in T-I at 7 days and 11 days, respectibely. And the full blooms in T-II and T-III were earlier than that in T-I at 11 days and 23 days, respectively. Fruit size significantly increased with increased temperature. The citrus color index in the coloring phase markedly differed across treatments. Further, total soluble solid and acid contents markedly changed with temperature rise but the sugar-to-acid ratio did not. Sucrose content tended to decrease with increase in temperature, but citric acid content remained unaffected. CONCLUSION(S): Elevated temperature accelerated plant growth and development but delayed rind color development in 'Shiranuhi' mandarin. Therefore, rise in ambient temperature by >4.6℃ may negatively affect yield and fruit quality.

Keywords

Acknowledgement

This study was supported by the Research Program for Horticultural Science and Technology Development, National Institute of Horticultural and Herbal Science, Rural Development Administration (RDA), Republic of Korea (PJ 01414603). In addition, this study was supported by the 2019-2020 RDA Fellowship Program of the National Institute of Horticultural and Herbal Science, Rural Development Administration (RDA), Republic of Korea.

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