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Article

Analysis of the Rice Yield under an Agrivoltaic System: A Case Study in Japan

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Graduate Program in Sustainability Science—Global Leadership Initiative Environmental Studies Building, The University of Tokyo, 5-1-5 Kashiwanoha, Chiba 277-8563, Japan
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Faculty of Engineering, The University of Tokyo, Chiba 277-8563, Japan
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Graduate School of Frontier Sciences, The University of Tokyo, Chiba 277-8563, Japan
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Graduate School of Engineering, The University of Tokyo, Chiba 277-8563, Japan
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Faculty of Food and Nutritional Sciences, University of Shizuoka, Shizuoka 422-8526, Japan
*
Author to whom correspondence should be addressed.
Received: 5 June 2021 / Revised: 25 June 2021 / Accepted: 6 July 2021 / Published: 10 July 2021
Agrivoltaic systems, comprising photovoltaic panels placed over agricultural crops, have recently gained increasing attention. Emerging interest in these systems led us to investigate their influence on rice crops. Various factors affecting rice crop yield, including fertilizer application, temperature, and solar radiation, were directly observed, and measured to evaluate changes associated with the shading rates of photovoltaic systems installed above rice crops. The results suggest that the allowable upper limit of the shading rate for agrivoltaic installations ranges from 27 to 39%, which sustains at least 80% of the rice yield, a condition set by the Japanese Ministry of Agriculture, Forestry and Fisheries for these systems. If such systems are applied to rice paddies in Japan at 28% density, they could generate 284 million MWh/yr. This is equivalent to approximately 29% of the total Japanese electricity demand, based on 2018 calculations. This projection indicates the potential of agrivoltaic systems for efficient land use and sustainable energy generation. View Full-Text
Keywords: agrivoltaic; photovoltaic system; rice paddy field; shading; sustainable energy; land use agrivoltaic; photovoltaic system; rice paddy field; shading; sustainable energy; land use
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MDPI and ACS Style

Gonocruz, R.A.; Nakamura, R.; Yoshino, K.; Homma, M.; Doi, T.; Yoshida, Y.; Tani, A. Analysis of the Rice Yield under an Agrivoltaic System: A Case Study in Japan. Environments 2021, 8, 65. https://0-doi-org.brum.beds.ac.uk/10.3390/environments8070065

AMA Style

Gonocruz RA, Nakamura R, Yoshino K, Homma M, Doi T, Yoshida Y, Tani A. Analysis of the Rice Yield under an Agrivoltaic System: A Case Study in Japan. Environments. 2021; 8(7):65. https://0-doi-org.brum.beds.ac.uk/10.3390/environments8070065

Chicago/Turabian Style

Gonocruz, Ruth A., Ren Nakamura, Kota Yoshino, Masaru Homma, Tetsuya Doi, Yoshikuni Yoshida, and Akira Tani. 2021. "Analysis of the Rice Yield under an Agrivoltaic System: A Case Study in Japan" Environments 8, no. 7: 65. https://0-doi-org.brum.beds.ac.uk/10.3390/environments8070065

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