Identification of Appropriate Light Intensity and Daytime Temperature for Cucumber ( Cucumis sativus L.) Seedlings in a Plant Factory with Artificial Lighting for Use as Grafting Material

Hwi-Chan Yang, Young-Ho Kim, Hyo-Jeung Byun, In-Lee Choi, Ngoc-Thang Vu, Dea-Hoon Kim, Hyuk-Sung Yoon () and Dong-Cheol Jang ()
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Hwi-Chan Yang: Department of Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon 24341, Republic of Korea
Young-Ho Kim: Department of Horticulture, Kangwon National University, Chuncheon 24341, Republic of Korea
Hyo-Jeung Byun: Dongbangagro Co., Ltd., Buyeo 323-932, Republic of Korea
In-Lee Choi: Agricultural and Life Science Research Institute, Kangwon National University, Chuncheon 24341, Republic of Korea
Ngoc-Thang Vu: Faculty of Agronomy, Vietnam National University of Agriculture, Hanoi 131000, Vietnam
Dea-Hoon Kim: Hoban Agriculture Corporation, Chuncheon 24211, Republic of Korea
Hyuk-Sung Yoon: The Waksman Institute of Microbiology, Rutgers the State University of New Jersey, Piscataway, NJ 08854, USA
Dong-Cheol Jang: Department of Interdisciplinary Program in Smart Agriculture, Kangwon National University, Chuncheon 24341, Republic of Korea

Sustainability, 2023, vol. 15, issue 5, 1-15

Abstract: In this study, an experiment was conducted to suggest optimal daytime temperature and light intensity for cucumber scion and rootstock production in a plant factory with artificial light. Plant growth of cucumber scions and rootstocks at a day/night temperature of 26/18 °C and photosynthetic photon fluxes of 50, 120, 190, 260, 330, and 400 μmol·m −2 ·s −1 was investigated. Plant growth under daytime temperatures of 25/18, 26/18, 27/18, and 28/18 °C at a photosynthetic photon flux of 260 μmol·m −2 ·s −1 was investigated. As the photosynthetic photon flux increased, hypocotyl length was shortened in cucumber scions and rootstocks, but Dickson quality index, compactness, and Seedling Health Index were improved. As the daytime temperature increased, the hypocotyl length of cucumber scions increased, but the quality of seedlings decreased. The root growth of scions decreased as the daytime temperature increased. As for the correlation between the major growth indicators, Dickson quality index, compactness, and Seedling Health Index showed a high correlation of more than 0.8 in stem diameter, leaf, and root weight. Therefore, it is judged that it is most efficient to maintain the photosynthetic photon flux at 260 μmol·m −2 ·s −1 throughout the year and adjust the daytime temperature to 25 to 28 °C according to the season for farms and commercial nurseries that produce cucumber seedlings by installing plant factories with artificial light.

Keywords: correlation; environment; quality; RGR; rootstock; scion (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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