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자료유형
학술저널
저자정보
저널정보
한국원예학회 HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY Vol.48 No.1
발행연도
2007.2
수록면
60 - 67 (8page)

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This study was conducted to determine the effects of CO₂ on stock plant growth and cutting production in Kalanchoe blossfeldiana Poelln. ‘Margrethe’. Stock plants were grown at ambient (450 ± 50 μ㏖ㆍ㏖?¹) and elevated (850 ± 50 μ㏖ㆍ㏖?¹) CO₂ levels. CO₂ assimilation rate increased with sunrise and decreased with sunset according to light intensity change pattern, whereas CO₂ gas exchange showed the opposite pattern. However, temperature did not greatly influence CO₂ assimilation rate, which was highest at 400 μ㏖ㆍm?²ㆍs?¹ photosynthetically active radiation (PAR) at 20°C, and 300-400 μ㏖ㆍm?²ㆍs?¹ PAR at 25 and 30°C. In addition, the highest CO₂ assimilation rate was recorded with 1,200 μ㏖ㆍm?²ㆍs?¹ at 25°C and 400 μ㏖ㆍm?²ㆍs?¹ PAR. With 800 μ㏖ㆍ㏖?¹ CO₂, the CO₂ assimilation rate was 70-80% of that with 1,200 μ㏖-㏖?¹CO₂. Elevated CO₂ promoted stock plant growth, the number of cuttings, and cutting quality. Cuttings harvested from CO₂-enriched stock plant resulted in promoted rooting and growth after 21 days of growth. This resulted from the accumulation of carbohydrates by increase in photosynthesis under high CO₂. Elevated CO₂ reduced stomatal conductance and transpiration of stock plant, and thereby inhibited mineral nutrient uptake. In conclusion, CO₂ enrichment could be recommended to improve stock plant growth and cutting yield and quality in ‘Margrethe’ kalanchoe.

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Abstract
Introduction
Materials and Methods
Results and Discussion
Aknowledgements
Literature Cited

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