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Changes of Plant Biomass and Proximate Composition of Radish Exposed to Elevated Temperature and $CO_2$ Concentration  

Seo, Tae-Cheol (Vegetable Research Division, National Institute of Horticultural and Herbal Science, RDA)
Jang, Yoon-Ah (Vegetable Research Division, National Institute of Horticultural and Herbal Science, RDA)
Nam, Chun-Woo (Vegetable Research Division, National Institute of Horticultural and Herbal Science, RDA)
Oh, Sang-Seok (Vegetable Research Division, National Institute of Horticultural and Herbal Science, RDA)
Um, Yeong-Cheol (Vegetable Research Division, National Institute of Horticultural and Herbal Science, RDA)
Han, Jeom-Hwa (Fruit Research Division, National Institute of Horticultural and Herbal Science, RDA)
Publication Information
Journal of Bio-Environment Control / v.21, no.1, 2012 , pp. 20-27 More about this Journal
Abstract
This experiment was conducted to evaluate the long-term effect of the elevated temperature and $CO_2$ concentration on the plant biomass, C/N ratio, and proximate composition of radish. Elevated temperature by 2~2.5 higher than ambient temperature decreased plant biomass by 39% in the spring and 26% in the autumn, respectively. Elevated $CO_2$ concentration by $220{\sim}230{\mu}mol\;mol^{-1}$ higher than ambient $CO_2$ concentration increased plant biomass especially in root. The elevated $CO_2$ concentration, however, could not compensate for the negative effect of elevated temperature on the plant biomass entirely. Elevated temperature increased T/R ratio by 86% in the spring and 60% in the autumn, respectively. Elevated temperature lowered C/N ratio and raised crude protein, crude fat, and ash content in radish root. On the contrary, elevated $CO_2$ concentration raised C/N ratio and lowered the crude protein, crude fiber, and ash contents. These results indicate that climate change affect the biomass yield and internal materials of radish depending on the extent of temperature and $CO_2$ concentration rise in the future.
Keywords
biomass; elevated $CO_2$; elevated temperature; proximate composition; radish;
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