Korean Journal of Agricultural and Forest Meteorology (한국농림기상학회지)

Korean Society of Agricultural and Forest Meteorology (한국농림기상학회)
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Changes of Soil Temperature and Moisture under the Agrivoltaic Systems in Fallow Paddy Field during Spring Season

봄철 영농형 태양광 시설 하부 휴경논 토양의 온도와 수분 변화

  • Yuna Cho (Department of Applied Plant Science, Chonnam National University) ;
  • Euni Cho (Department of Applied Plant Science, Chonnam National University) ;
  • Jae-Hyeok Jeong (National Institute of Crop Science, Rural Development Administration) ;
  • Hoejeong Jeong (Crop Production Technology Research Division, National Institute of Crop Science, Rural Development Administration) ;
  • Woon-Ha Hwang (National Institute of Crop Science, Rural Development Administration) ;
  • Jaeil Cho (Department of Applied Plant Science, Chonnam National University)
  • 조유나 (전남대학교 농업생명과학대학 응용식물학과) ;
  • 조은이 (전남대학교 농업생명과학대학 응용식물학과) ;
  • 정재혁 (농촌진흥청 국립식량과학원) ;
  • 정회정 (농촌진흥청 국립식량과학원 생산기술개발과) ;
  • 황운하 (농촌진흥청 국립식량과학원) ;
  • 조재일 (전남대학교 농업생명과학대학 응용식물학과)
  • Received : 2022.07.20
  • Accepted : 2023.08.22
  • Published : 2023.09.30
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Abstract

An agrivoltaic system (AVS) is a combined system that generates power through photovoltaic panels (PVPs) installed above a field where a crop is cultivated. Although soil moisture is an important limiting factor for open-field crop production, particularly during spring season in Korea, it is not well considered in the utilization of AVS. Indeed, the application of water-energy-food nexus on the AVS should be necessary. In this study, the changes of soil moisture and temperature under the AVS was investigated in fallow paddy field during spring season. The AVS that has partial shading condition by PV panels was decreased soil temperature and increased soil moisture compared to open-field. Furthermore, the maximum of the change in soil moisture to the change in soil temperature had a negative correlation both on open-field and AVS under wet condition. It represents that the micro-climate under the AVS is in energy-limited condition. The open-field of relatively high soil temperature was in water-limited condition. The different behavior of soil moisture on the AVS should be considered for the sustainable agricultural system as related to water-energy-food nexus.

영농형 태양광 시스템은 노지 작물 경작과 동일한 토지 상부에 설치된 태양광 패널을 통한 발전을 동시에 하는 시스템이다. 지금까지 영농형 태양광은 에너지와 식량의 양자구도로만 집중되어있다. 영농환경 중 하나인 토양수분은 강우 또는 관개수로 증발 및 유출⋅침투로 손실된 수분을 공급받아 노지 작물 생산에 기여한다. 본 연구는 식량, 에너지와 함께 물의 개념을 포함하여 영농형 태양광 시설을 보고자 하였으며, 미기상 관측을 통해 봄 기간 동안 휴경논에서 영농형 태양광 시설 하부의 토양수분과 지온의 변화를 분석하였다. 영농형 태양광 하부는 패널로 인한 부분차광 조건으로 지면에 입사되는 광 에너지량이 감소하여 지온이 낮아질 뿐만 아니라 토양수분 손실이 적어 대조구인 노지에 비해 습윤한 조건을 보인다. 또한, 태양광 하부는 에너지 제한 환경이며, 상대적으로 지온이 높은 노지는 수분 제한 환경으로 설명된다. 노지와 태양광 하부의 상이한 토양수분 환경은 필연적으로 작물에 영향을 미칠 것이며, 농업 환경과 농촌 경제를 고려한 지속가능한 대처가 필요하겠다.

Keywords

Acknowledgement

이 논문은 농촌진흥청의 영농형 태양광 유형별 벼 적정 재배기술 개발 및 밭작물 차광 영향 구명(PJ01678001) 지원을 받았으며, 이에 감사드립니다.

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