Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Comparison of Growth Characteristics of Strawberry according to Integrated Solar Radiation Control by Growth Stages

딸기 생육단계별 일사비례제어 급액 방법에 따른 딸기 생육 비교

  • Kim, So Hui (Protected Horticulture Research Institute, NIHHS, RDA) ;
  • Roh, Mi Young (Protected Horticulture Research Institute, NIHHS, RDA) ;
  • Choi, Gyeong Lee (Protected Horticulture Research Institute, NIHHS, RDA) ;
  • Lim, Mi Young (Protected Horticulture Research Institute, NIHHS, RDA)
  • 김소희 (국립원예특작과학원 시설원예연구소) ;
  • 노미영 (국립원예특작과학원 시설원예연구소) ;
  • 최경이 (국립원예특작과학원 시설원예연구소) ;
  • 임미영 (국립원예특작과학원 시설원예연구소)
  • Received : 2021.09.07
  • Accepted : 2022.09.27
  • Published : 2022.10.31
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Abstract

This study was carried out to establish proper irrigation standards by growth stages using integrated solar radiation (ISR) for strawberry hydroponics cultivation. The irrigation methods were automatically controlled when it reached ISR values based on the external solar irradiance. The ISR standards were set at 150 J·cm-2 and 200 J·cm-2, and as the last treatment, ISR value was changed from 200 J·cm-2 to 150 J·cm-2 according to growth stage. The timer-automated irrigation system was applied as a control. The monthly average irrigation frequency of 150 J·cm-2, growth stages (150 J·cm-2) treatment in March were 5.6 times, that of 200 J·cm-2, growth stages (200 J·cm-2) treatment in December were 2.7 times, and that of timer system was 3.6-3.8 times. The water use efficiency (WUE) of timer was 19.8 g·L-1 lower than ISR. There was no significant difference in growth and fruit characteristics between ISR and timer. The total yield and rate of marketable fruit of treatments by growth stages was the highest 328 g/10 a and 85.3 %, respectively. Therefore, in case of strawberry hydroponic cultivation, controlling ISR by growth stages was more helpful to improve yield rather than applying same ISR standard during cultivation.

딸기 수경재배 시 일사비례제어를 이용하여 생육단계별 적정 누적일사량 기준을 설정하고자 수행하였다. 급액 방법은 외부 일사량을 기준으로 일정 누적 일사량에 도달하면 급액하였고 누적 일사량 기준은 150, 200J·cm-2과 생육단계에 따라 200J·cm-2에서 150J·cm-2로 변경하는 처리를 두었다. 타이머 제어는 대조구로 설정하였다. 월별 평균 급액 횟수는 누적 일사량이 많은 3월에 150 J·cm-2과 생육단계별(150J·cm-2) 처리구가 5.6회, 누적일사량이 적은 12월에 200J·cm-2과 생육단계별(200J·cm-2) 처리구가 2.7회, 타이머는 3.6-3.8회였다. 수분이용효율은 주당 총 급액량이 적었던 타이머 처리구가 19.8g·L-1로 일사제어 처리구에 비해 낮았다. 일사제어에 따른 생육 및 과실 특성은 차이가 없었다. 생육단계별 처리구가 총 상품과 수량은 주당 328g, 상품과율 85.3%로 가장 높았다. 딸기 수경재배 시 일사비례 급액제어 방식은 재배기간 동안 동일한 누적일사량 기준보다 생육단계별로 누적일사량을 조절하는 것이 과실의 수량 향상에 도움이 되었다.

Keywords

Acknowledgement

본 연구는 농촌진흥청 연구개발사업(과제번호: PJ01425601)의 지원에 의해 수행되었음.

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