Optimizing Indoor Hemp Cultivation Efficiency through Differential Day–Night Temperature Treatment
This study was conducted to determine the optimal temperature difference in day–night indoor cultivation conditions to enhance the flower yield and functional component contents of female hemp plants. Hemp clones were cultivated under five distinct day and night temperature differences (DIF) during...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-10-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/13/10/2636 |
| _version_ | 1797574996595310592 |
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| author | Gwonjeong Bok Seungyong Hahm Juhyung Shin Jongseok Park |
| author_facet | Gwonjeong Bok Seungyong Hahm Juhyung Shin Jongseok Park |
| author_sort | Gwonjeong Bok |
| collection | DOAJ |
| description | This study was conducted to determine the optimal temperature difference in day–night indoor cultivation conditions to enhance the flower yield and functional component contents of female hemp plants. Hemp clones were cultivated under five distinct day and night temperature differences (DIF) during the reproductive stage. The daytime and nighttime temperature settings were as follows: 18:30 °C (negative 12 DIF), 21:27 °C (negative 6 DIF), 24:24 °C (0 DIF), 27:21 °C (positive 6 DIF), and 30:18 °C (positive 12 DIF). Seven weeks after transplantation, the growth parameters, leaf gas exchange, total phenolic compounds, 2,2-diphenylpicrylhydrazyl scavenging activity, and cannabinoid contents were analyzed. The total shoot biomass based on dry weight was highest at 21:27, reaching 41.76 g, and lowest at 30:18, measuring 24.46 g. However, the flower biomass, which is the primary production site, was highest at 24:24 and lowest at 18:30, showing a 4.7-fold difference. The photosynthesis-related parameters were temperature-dependent and strongly correlated with biomass production. The cannabinoid content of the hemp leaves increased at 21:27, whereas that of the hemp flowers increased at 27:21. The findings of this study indicate that the optimal temperature condition for female hemp flower production in a limited space is positive 6 DIF treatment, which corresponds to 27:21 °C. These results can contribute to advancements in indoor crop cultivation technology. |
| first_indexed | 2024-03-10T21:30:04Z |
| format | Article |
| id | doaj.art-1eab0139e1f04633816d14c1f5807dc7 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-03-10T21:30:04Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-1eab0139e1f04633816d14c1f5807dc72023-11-19T15:22:58ZengMDPI AGAgronomy2073-43952023-10-011310263610.3390/agronomy13102636Optimizing Indoor Hemp Cultivation Efficiency through Differential Day–Night Temperature TreatmentGwonjeong Bok0Seungyong Hahm1Juhyung Shin2Jongseok Park3Department of Bio-AI Convergence, Chungnam National University, Daejeon 34134, Republic of KoreaDepartment of Horticultural Science, Chungnam National University, Daejeon 34134, Republic of KoreaDepartment of Bio-AI Convergence, Chungnam National University, Daejeon 34134, Republic of KoreaDepartment of Bio-AI Convergence, Chungnam National University, Daejeon 34134, Republic of KoreaThis study was conducted to determine the optimal temperature difference in day–night indoor cultivation conditions to enhance the flower yield and functional component contents of female hemp plants. Hemp clones were cultivated under five distinct day and night temperature differences (DIF) during the reproductive stage. The daytime and nighttime temperature settings were as follows: 18:30 °C (negative 12 DIF), 21:27 °C (negative 6 DIF), 24:24 °C (0 DIF), 27:21 °C (positive 6 DIF), and 30:18 °C (positive 12 DIF). Seven weeks after transplantation, the growth parameters, leaf gas exchange, total phenolic compounds, 2,2-diphenylpicrylhydrazyl scavenging activity, and cannabinoid contents were analyzed. The total shoot biomass based on dry weight was highest at 21:27, reaching 41.76 g, and lowest at 30:18, measuring 24.46 g. However, the flower biomass, which is the primary production site, was highest at 24:24 and lowest at 18:30, showing a 4.7-fold difference. The photosynthesis-related parameters were temperature-dependent and strongly correlated with biomass production. The cannabinoid content of the hemp leaves increased at 21:27, whereas that of the hemp flowers increased at 27:21. The findings of this study indicate that the optimal temperature condition for female hemp flower production in a limited space is positive 6 DIF treatment, which corresponds to 27:21 °C. These results can contribute to advancements in indoor crop cultivation technology.https://www.mdpi.com/2073-4395/13/10/2636Δ9-tetrahydrocannabinolcannabidiolbiomassindoor farmingindustrial hemp |
| spellingShingle | Gwonjeong Bok Seungyong Hahm Juhyung Shin Jongseok Park Optimizing Indoor Hemp Cultivation Efficiency through Differential Day–Night Temperature Treatment Agronomy Δ9-tetrahydrocannabinol cannabidiol biomass indoor farming industrial hemp |
| title | Optimizing Indoor Hemp Cultivation Efficiency through Differential Day–Night Temperature Treatment |
| title_full | Optimizing Indoor Hemp Cultivation Efficiency through Differential Day–Night Temperature Treatment |
| title_fullStr | Optimizing Indoor Hemp Cultivation Efficiency through Differential Day–Night Temperature Treatment |
| title_full_unstemmed | Optimizing Indoor Hemp Cultivation Efficiency through Differential Day–Night Temperature Treatment |
| title_short | Optimizing Indoor Hemp Cultivation Efficiency through Differential Day–Night Temperature Treatment |
| title_sort | optimizing indoor hemp cultivation efficiency through differential day night temperature treatment |
| topic | Δ9-tetrahydrocannabinol cannabidiol biomass indoor farming industrial hemp |
| url | https://www.mdpi.com/2073-4395/13/10/2636 |
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