Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Changes of Plant Biomass and Proximate Composition of Radish Exposed to Elevated Temperature and $CO_2$ Concentration

온도 및 $CO_2$ 농도 상승에 따른 무의 건물생산 및 일반 영양성분 변화

  • 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)
  • 서태철 (국립원예특작과학원 채소과) ;
  • 장윤아 (국립원예특작과학원 채소과) ;
  • 남춘우 (국립원예특작과학원 채소과) ;
  • 오상석 (국립원예특작과학원 채소과) ;
  • 엄영철 (국립원예특작과학원 채소과) ;
  • 한점화 (국립원예특작과학원 과수과)
  • Received : 2011.10.13
  • Accepted : 2012.02.03
  • Published : 2012.03.31
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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.

상승 온도와 상승 $CO_2$ 농도 처리가 무의 생장량, C/N율, 그리고 식품 일반 영양성분에 미치는 효과를 검토한 결과, 대기 온도보다 $2{\sim}2.5^{\circ}C$ 범위의 온도 상승은 무의 건물생산을 26~39% 범위의 감소를 가져오며, 대기 $CO_2$ 농도가 220~230ppm 상승함에 따라서 건물생산의 감소가 9~15% 범위로 어느 정도 줄어들지만, 온도 상승에 의한 감소 효과를 극복하지 못했다. 온도 상승은 무의 T/R율을 봄에는 86%, 가을에는 60% 증가시켰으며, C/N율을 낮추고, 조단백질, 조지방, 그리고 회분의 함량을 높이는 결과를 나타내었다. 반면에 상승 $CO_2$ 처리는 C/N율은 높이고 조단백질, 조섬유, 그리고 회분의 함량을 저하시키는 결과를 나타내었다. 따라서 앞으로 온도 상승과 $CO_2$ 농도 상승 정도에 따라 무의 건물생산, T/R율, C/N율, 그리고 일반 영양성분에 상당한 영향을 미칠 것으로 판단된다.

Keywords

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