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논문 기본 정보

자료유형
학술저널
저자정보
John T. A. Proctor (University of Guelph) John W. Palmer (Plant and Food Research Ltd.) John M. Follett (AgResearch)
저널정보
고려인삼학회 Journal of Ginseng Research Journal of Ginseng Research Vol.34 No.3
발행연도
2010.9
수록면
175 - 182 (8page)

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초록· 키워드

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North American ginseng seedlings (Panax quinquefolius L.) were grown in pots in heated greenhouses, in a cool greenhouse, or in the field, in 11 experiments at various times over 16 years. Crop establishment, dry matter partitioning, photosynthesis, radiation use efficiency and carbon budget were measured and/or calculated in some years. Once the seedling canopy, of about 20 ㎠ per seedling, and a leaf area index of 0.37, was established, about 40 days after germination, full canopy display lasted about 87 days. Only 16.6% of the incoming solar radiation was intercepted by the crop, the remainder falling on the mulched soil surface. Total and root dry matter accumulations in the cool greenhouse and in the field were about double that in the heated greenhouses. Partitioning of dry matter to roots (economic yield or harvest index) in the cool greenhouse and in the field was 73% whereas it was 62.5% in the heated greenhouses. The relationship between root dry matter and radiation interception during the full canopy period was linear with growth efficiencies of 2.92 ㎎ MJ?¹ at 4.8% of incoming radiation and 0.30 ㎎ MJ?¹ at 68% of incoming radiation. A photosynthetic rate of 0.39 g m?² h?¹ was attained at light saturation of about 150 μ㏖ m?² s?¹ (7.5% of full sunlight); dark respiration was 0.03 g m?² h?¹, about 8.5% of maximum assimilation rate. Estimates of dry matter accumulation by growth analysis and by CO₂ uptake were similar, 6.21 vs. 7.62 ㎎ CO₂, despite several assumptions in CO₂ uptake calculations.

목차

INTRODUCTION
MATERIALS AND METHODS
RESULTS AND DISCUSSION
ACKNOWLEDGEMENTS
REFERENCES

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UCI(KEPA) : I410-ECN-0101-2012-524-003668304