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학술대회자료
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(사)한국생물환경조절학회 한국생물환경조절학회 학술발표논문집 한국생물환경조절학회 추계학술발표논문집
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64 - 69 (6page)

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초록· 키워드

To evaluate the biological and physiological response of Picea koraiensis Nakai to elevated CO₂ and nitrogen. 3-year old seedlings were planted in an ambient and 700 ppm CO₂ at low (2mM NH₄N0₃) or high nitrogen (l6mM NH₄NO₃) supplying treatments for 3 months. Photosynthetic parameters were measured monthly. Seedlings were harvested at monthly intervals and growth parameters of root system, stem and needle fractions were evaluated. The result showed that height of the seedlings grown at both of elevated CO₂× high nitrogen and elevated CO₂× low nitrogen supplying treatments increased significantly more than that of at ambient CO₂ treatments. Seedlings grown at elevated CO₂× high nitrogen produced more root biomass than at elevated CO₂× low nitrogen and ambient CO ₂× high nitrogen treatments. This result suggested that the root growth response of Picea koraiensis seedlings was greater in elevated CO₂× high nitrogen regime, which is very important for carbon sequestration in soil. A<SUB>max</SUB>of the seedlings grown at elevated CO₂× high nitrogen increased during the three months significantly, and A<SUB>max</SUB>of the seedlings grown at the other three treatments decreased significantly, suggesting that the interaction between elevated CO₂ and high nitrogen supplying stimulates the A<SUB>max</SUB> of Picea koraiensis. A<SUB>max</SUB> of the seedlings grown at elevated CO₂× low nitrogen showed higher than other three treatments in the first month of the experiment, but decreased in succedent two months, suggesting that elevated CO₂ promotes the photosynthesis of the seedlings. However long term growth in elevated CO₂× low nitrogen supplying condition resulted in an acclimatory decreased in leaf photosynthesis.
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목차

  1. Abstract
  2. Introduction
  3. Materials and Methods
  4. References

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