한국농림기상학회지, 제 14권 제3호(2012) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 14, No. 3, (2012), pp. 108~118
DOI: 10.5532/KJAFM.2012.14.3.108
ⓒ Author(s) 2014. CC Attribution 3.0 License.


대기 이산화탄소 증가와 질소 시비가 백합나무 유묘의 생장과 탄소
흡수에 미치는 영향

정미숙(1,2), 한심희(1), 김두현(1), 이재천(1), 김판기(2)
(1)국립산림과학원 산림유전자원부, (2)경북대학교 산림환경자원학과

(2012년 02월 15일 접수; 2012년 08월 28일 수정; 2012년 09월 07일 수락)

Effects of Elevated Atmospheric CO2 and Nitrogen Fertilization on
Growth and Carbon Uptake of Yellow Poplar Seedlings

Mi-Sook Chung(1,2), Sim-Hee Han(1), Du-Hyun Kim(1), Jae-Cheon Lee(1), Pan-Gi Kim(2)
(1)Department of Forest Genetic Resources, Korea Forest Research Institute, Suwon, 441-847, Korea
(2)Department of Forest Resources and Environment, Kyungpook National University, Sangju, 742-711, Korea

(Received February 15, 2012; Revised August 28, 2012; Accepted September 07, 2012)

ABSTRACT
To investigate the responses of yellow poplar (Liriodendron tulipifera L.) seedlings to the interactive effects of the elevated atmospheric CO2 level and nitrogen addition, we measured biomass, photosynthetic pigments, photosynthesis, and the contents of nitrogen (N) and carbon (C) from the seedlings after 16 weeks of the treatments. Yellow poplar seedlings were grown under the ambient (400μmol mol-1) and the elevated (560 and 720 μmol mol-1) CO2 concentratoins with three different N addition levels (1.2, 2.4, and 3.6 g kg-1) in the Open Top Chambers (OTC). The dry weight of the seedlings enhanced with the increased N levels under the elevated CO2 concentrations and the increment of the dry weight differed among the different N levels. Photosynthetic pigment content of the yellow poplar leaves also increased with the increase of the CO2 concentration levels. The effects of the N levels on the photosynthetic pigment content, however, were significantly different among the CO2 levels. Photosynthetic rates were affected by the levels of CO2 and N concentrations. Stomatal conductance and transpiration rates increased with increasing CO2 concentration. The carboxylation efficiency of the seedlings without N addition increased under the higher CO2 concentrations whereas that with N addition decreased under the elevated CO2 concentrations. Nitrogen and carbon uptake in leaf, stem, and root increased with the elevated CO2 concentration level and N addition. In conclusion, under the elevated CO2 concentrations, physiological characteristics and carbon uptake of the yellow poplar seedling were improved and increased with N addition.

Keyword: Biomass, Photosynthetic rate, Nitrogen fertilization, Stomatal conductance, Carboxlation efficiency

MAIN

적요

본 연구는 기후변화 하에서 우리나라 기후와 산림토양에 적합한 수종을 개발하기 위해서, 상부 개방형 온실(Open Top Chamber)을 이용하여, CO2 농도를 대기보다 1.4배와 1.8배 증가시킨 상태에서, 질소 농도에 따른 백합나무의 생리적 반응을 조사하고자 실시하였다. 백합나무 유묘의 건중량은 모든 CO2 농도 하에서, 질소 시비량의 증가와 함께 증가하였다. 그러나 CO2 농도 증가에 따른 백합나무 건중량 변화는 질소 시비 농도에 따라 다른 결과를 보였다. 총 엽록소와 카로테노이드 함량은 모든 질소 시비구에서 CO2 농도증가와 함께 증가하였으나, 질소 시비에 대한 효과는 CO2 농도에 따라 차이가 있었다. 백합나무의 광합성 특성은 CO2 측정 농도, CO2 처리 농도 및 질소 시비 농도에 따라 차이를 보였으며, 기공전도도와 증산속도는 CO2 처리에 의해 증가하였다. 백합나무의 탄소고정효율은 CO2 농도 증가와 함께 증가하는 경향을 보였으나, 질소 시비구에서는 CO2 농도 증가에 의해 오히려 감소하였다. 백합나무의 잎, 줄기, 뿌리에 축적된 질소와 탄소 함량은 CO2 증가와 질소 시비와 함께 증가하였다. 결론적으로 CO2 농도가 높은 상태에서 백합나무의 생리적 특성과 탄소 흡수 능력은 질소시비에 의해서 개선되거나 증가하였지만, CO2 농도에
따라 크게 영향을 받았다.

감사의 글

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