Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Growth and Physiological Characteristics of Pinus densiflora Seedlings in Response to Open-field Experimental Warming using the Infrared Lamp

적외선등을 이용한 실외 실험적 온난화 처리가 소나무 묘목의 생장과 생리적 특성에 미치는 영향

  • Lee, Sun Jeoung (Department of Environmental Science and Ecological Engineering, Korea University) ;
  • Han, Saerom (Department of Environmental Science and Ecological Engineering, Korea University) ;
  • Yoon, Tae Kyung (Department of Environmental Science and Ecological Engineering, Korea University) ;
  • Han, Seung Hyun (Department of Environmental Science and Ecological Engineering, Korea University) ;
  • Jung, Yejee (Department of Environmental Science and Ecological Engineering, Korea University) ;
  • Yun, Soon Jin (Department of Environmental Science and Ecological Engineering, Korea University) ;
  • Son, Yowhan (Department of Environmental Science and Ecological Engineering, Korea University)
  • 이선정 (고려대학교 환경생태공학과) ;
  • 한새롬 (고려대학교 환경생태공학과) ;
  • 윤태경 (고려대학교 환경생태공학과) ;
  • 한승현 (고려대학교 환경생태공학과) ;
  • 정예지 (고려대학교 환경생태공학과) ;
  • 윤순진 (고려대학교 환경생태공학과) ;
  • 손요환 (고려대학교 환경생태공학과)
  • Received : 2013.07.01
  • Accepted : 2013.09.23
  • Published : 2013.12.31
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Abstract

Climate change will affect the physiological traits and growth of forest trees. This study was conducted to investigate the effects of an experimental warming on growth and physiological characteristics of Pinus densiflora S. et Z. seedlings. One-year-old P. densiflora seedlings were planted in control and warmed plots in April 2010. The air temperature of warmed plots was increased by $3^{\circ}C$ using infrared lamps from November 2010. We measured shoot height, root collar diameter, above and below ground biomass, chlorophyll contents and leaf nitrogen concentration from March 2011 to March 2013. Seedling height and root collar diameter showed no significant difference between warmed and control plots except for root collar diameter measured in June 2012. Seedling leaf biomass was lower in the warmed ($23.94{\pm}2.10g$) than in the control ($26.08{\pm}1.72g$) plots in 2013. Shoot to root ratio (S/R ratio) was lower in the warmed ($1.09{\pm}0.07$) than in the control ($1.31{\pm}0.10$) plots in 2013. Leaf nitrogen concentrations and chlorophyll contents were not significantly different between warmed and control plots except for leaf nitrogen concentration in 2011. Leaf C/N ratio was increased in 2012 under the warming treatment. Low growth and S/R ratio in warmed plots might be related to the higher temperature and water stress. In the future, the below-ground carbon allocation of P. densiflora might be increased by global warming due to temperature and water stress.

기후변화는 수목의 생장과 생리적 특성에 영향을 미칠 것으로 예상되고 있다. 본 연구는 인위적 온난화에 의한 소나무 묘목의 생장과 생리적 반응을 알아보기 위한 목적으로 수행되었다. 이를 위하여 2010년 4월 고려대학교 구내 묘포장에 1년생 소나무 묘목을 식재하고 당해 11월부터 적외선등을 이용하여 $3^{\circ}C$ 온도를 증가시키는 온난화 처리를 하였으며, 2011년부터 3월부터 2013년 3월까지 묘고 및 근원경, 지상부 및 지하부 생물량, 잎의 엽록소함량 및 질소 농도 등을 측정하였다. 묘고와 근원경의 경우 2012년 6월에 측정한 근원경을 제외하고 온난화 처리구와 대조구간 유의한 차이를 보이지 않았다. 그러나 2013년 묘목 개체당 잎의 생물량은 온난화 처리구($23.94{\pm}2.10g$)에서 대조구($26.08{\pm}1.72g$)보다 낮게 나타났으며, 줄기와 뿌리의 생물량 비율(S/R율)은 2013년에 온난화 처리구($1.09{\pm}0.07$)에서 대조구($1.31{\pm}0.10$)보다 낮게 나타났다. 한편 잎의 엽록소 함량 및 질소 농도는 2011년 잎의 질소 농도를 제외하고 온난화 처리와 대조구간 통계적으로 유의한 차이를 보이지 않았다. 그리고 잎의 C/N율은 2012년에 온난화 처리구에서 대조구보다 높게 나타났다. 온난화 처리에 따른 소나무 묘목의 일부 생장 및 S/R율 감소는 온도 및 수분 스트레스와 관련이 있을 것으로 추정된다. 본 연구결과 향후 온난화가 지속되면 국내 소나무는 온도 및 수분스트레스로 인해 지하부로의 탄소 분배를 확대시킬 가능성이 있는 것으로 사료된다.

Keywords

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