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자료유형
학술저널
저자정보
저널정보
한국원예학회 HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY JOURNAL OF THE KOREAN SOCIETY FOR HORTICULTURAL SCIENCE Vol.46 No.2
발행연도
2005.4
수록면
126 - 131 (6page)

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To investigate the effects of elevated CO₂ and temperature on plant biomass production and N uptake, Chinese cabbages (Brassica campestris cv. Jangmi) were grown at two rates of N (350 and 700 ㎎ㆍ㎏?¹) under contrasting atmospheric CO₂ (360 and 650 μmol·mol?1) in combination with current ambient or elevated (ambient + 5ºC) temperature for 70 days. Temperature, CO₂, and N rate significantly affected dry-mass of Chinese cabbage. Elevated CO₂ suppressed dry-mass accumulation of the plants receiving N at 350 ㎎ㆍ㎏?¹ irrespective of temperature, but the degree of suppression was significantly reduced for the plants receiving N at 700 ㎎ㆍ㎏?¹ only when coupled with elevated temperature. Temperature and CO₂ significantly affected N content of Chinese cabbages, while N rate did not. Irrespective of temperature and CO₂ levels, N uptake efficiency was reduced with increasing N rates. However, N uptake efficiency of the plants receiving high N rates grown at elevated-temperature regimes increased at elevated CO₂ levels whereas that of their counterparts grown at ambient-temperature regimes decreased, suggesting that the N rate of 700 ㎎ㆍ㎏?¹ would be insufficient to ensure optimum growth of Chinese cabbages under elevated temperature and CO₂. Our results suggested that an alternative N fertilization for Chinese cabbages should be tested if a doubling of atmospheric CO₂ level leads to elevated temperatures.

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Abstract
Introduction
Materials and Methods
Results and Discussion
Acknowledgements
Literature Cited

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