Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Growth of Cucumber and Tomato Seedlings by Different Light Intensities and CO2 Concentrations in Closed-type Plant Production System

밀폐형 식물생산시스템 내 CO2와 광도에 따른 오이 및 토마토 묘의 생육

  • Ji Hye Yun (Division of Applied Life Science, Graduate School of Gyeongsang National University) ;
  • Hyeon Woo Jeong (Division of Applied Life Science, Graduate School of Gyeongsang National University) ;
  • So Yeong Hwang (Division of Applied Life Science, Graduate School of Gyeongsang National University) ;
  • Jin Yu (Division of Applied Life Science, Graduate School of Gyeongsang National University) ;
  • Hee Sung Hwang (Division of Crop Science, Graduate School of Gyeongsang National University) ;
  • Seung Jae Hwang (Division of Horticultural Science, College of Agriculture & Life Science, Gyeongsang National University)
  • 윤지혜 (경상국립대학교 대학원 응용생명과학부) ;
  • 정현우 (경상국립대학교 대학원 응용생명과학부) ;
  • 황소영 (경상국립대학교 대학원 응용생명과학부) ;
  • 유진 (경상국립대학교 대학원 응용생명과학부) ;
  • 황희성 (경상국립대학교 대학원 작물생산과학부 ) ;
  • 황승재 (경상국립대학교 농업생명과학대학 원예과학부)
  • Received : 2023.06.26
  • Accepted : 2023.08.12
  • Published : 2023.10.31
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Abstract

This study was conducted to investigate the growth characteristics of cucumber (Cucumis sativus L. 'Joeunbaekdadagi') and tomato (Solanum lycopersicum L. 'Dotaerang Dia') seedlings by light intensities and CO2 concentrations in a closed-type plant production system (CPPS). Cucumber and tomato seeds were sown in 50-cell trays and germinated in CPPS at air temperature 25 ± 1℃ and relative humidity 50 ± 10% for 4 days. After germination, the CO2 concentrations and light intensity treatment were treated at 500 (ambient), 1,000, and 1,500 µmol·mol-1 and 100, 200, and 300 µmol·m-2·s-1 photosynthetic photon flux density (PPFD), respectively. The leaf area of cucumber showed the highest value in CO2 1,500 μmol·mol-1. However, the leaf area of the tomato had no significant difference in CO2 concentrations and light intensities treatments. In cucumber and tomato both seedlings, the growth and quality such as compactness and leaf area rate were increased with the increase of light intensity, and there were highest in 300 µmol·m-2·s-1. The root surface and number of root tips of cucumber and tomato seedlings were significantly increased with the increase in light intensity. In conclusion, the regulation of the CO2 concentrations and light intensity can control the growth and quality of cucumber and tomato seedlings in CPPS, especially, increasing the light intensity can improve more significantly the growth and quality of seedlings.

본 연구는 밀폐형 식물생산 시스템(CPPS)에서 광도와 CO2 농도에 따른 오이와 토마토 묘의 생육을 조사하기 위해 수행되었다. 오이(Cucumis sativus L. 'Joeunbaekdadagi')와 토마토(Solanum lycopersicum L. 'Dotaerang Dia')를 50구 트레이에 파종하여 CPPS에서 25℃, 50% 상대습도에서 4일 동안 발아시켰다. 발아 후 CO2 농도 처리 및 광도는 각각500(무처리구), 1,000, 그리고 1,500µmol·mol-1 와 100, 200, 그리고 300µmol·m-2·s-1로 재배하였다. 오이의 엽면적은 광도보다 CO2 농도 변화에 영향을 받으며 1,500µmol·mol-1 CO2 농도 조건에서 엽면적이 가장 넓었다. 반면에 토마토의 엽면적은 CO2 농도와 광도 변화에 따른 유의미한 차이를 나타내지 않았다. 광도가 증가함에 따라, 오이와 토마토의 생육과 묘소질(충실도와 엽면적비)이 유의적으로 증가하는 경향을 나타냈고, 광도 300µmol·m-2·s-1에서 가장 높았다. 오이와 토마토 묘의 근권 표면적, 근단 수는 광도의 증가에 따라 유의적으로 증가하였다. 결론적으로 CO2 농도와 광도의 조절은 오이와 토마토 묘의 생육과 묘소질을 조절할 수 있으나, CO2 농도보다 광도의 영향을 크게 받았으며, 광도가 증가함에 따라 생육, 묘소질, 그리고 뿌리가 발달하는 경향이 나타났다.

Keywords

Acknowledgement

본 연구는 농촌진흥청 공동연구사업(과제번호: RS-2022-RD010412)의 지원으로 수행되었음.

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