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http://dx.doi.org/10.5333/KGFS.2021.41.3.183

An Open Top Chamber for Forage Maize to Study the Effect of Elevated Temperature by Global Warming  

Min, Chang-Woo (Division of Applied Life Science (BK21) and Institute of Agriculture & Life Science (IALS), Gyeongsang National University)
Khan, Inam (Division of Applied Life Science (BK21) and Institute of Agriculture & Life Science (IALS), Gyeongsang National University)
Kim, Min-Jun (Division of Applied Life Science (BK21) and Institute of Agriculture & Life Science (IALS), Gyeongsang National University)
Yoon, Il-Kyu (Division of Applied Life Science (BK21) and Institute of Agriculture & Life Science (IALS), Gyeongsang National University)
Jung, Jeong Sung (Grassland and Forage Division, National Institute of Animal Science, RDA)
Lee, Byung-Hyun (Division of Applied Life Science (BK21) and Institute of Agriculture & Life Science (IALS), Gyeongsang National University)
Publication Information
Journal of The Korean Society of Grassland and Forage Science / v.41, no.3, 2021 , pp. 183-188 More about this Journal
Abstract
The increase in temperature due to climate warming is predicted to affect crop yields in the future. Until now, various types of OTC (open top chamber) that simulate the future climate condition have been developed and used to study the effect of temperature increase due to global warming on maize growth. However, in most OTCs, high equipment and maintenance costs were required to artificially increase the temperature. This study was carried to develop a cost-effective and simple OTC suitable for climate warming experiments for forage maize. Three octagonal OTCs with a height of 3.5 m × a diameter of 4.08 m and a partially covered top were constructed. The lower part of OTC covered film was opened at a height of 26 cm (OTC-26), 12 cm (OTC-12) from the ground surface, or not opened (0 cm, OTC-0). Mean air temperatures during the daytime on a sunny day in OTC-0, OTC-12 and OTC-26 increased to 3.23℃, 1.33℃, and 0.89℃, respectively, compared to the ambient control plot. For a pilot test, forage maize, 'Gwangpyeongok' was grown at OTCs and ambient control plots. As a result, in the late maize vegetative growth phase (July 30), the plant height was increased more than 45% higher than the ambient control plot in all OTC plots, and the stem diameter also increased in all OTC plots. These results indicate that it is possible to set the temperature inside the OTC by adjusting the opening height of the lower end of the OTC, and it can be applied to study the response of forage maize to elevated temperature. An OTC, with its advantages of energy free, low maintenance cost, and simple temperature setting, will be helpful in studying maize growth responsiveness to climate warming in the future.
Keywords
Climate warming; Forage maize; Open-top chamber; Temperature;
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Times Cited By KSCI : 1  (Citation Analysis)
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