Journal of Climate Change Research (한국기후변화학회지)

The Korean Society of Climate Change Research (한국기후변화학회)
권호 표지
DOI QR코드

DOI QR Code

Effect of Experimental Warming on Physiological and Growth Responses of Larix kaempferi Seedlings

실외 온난화 처리에 따른 낙엽송 묘목의 생리 및 생장 반응

  • An, Jiae (Dept. of Environmental Science and Ecological Engineering, Graduate School, Korea University) ;
  • Chang, Hanna (Dept. of Environmental Science and Ecological Engineering, Graduate School, Korea University) ;
  • Park, Min Ji (Dept. of Environmental Science and Ecological Engineering, Graduate School, Korea University) ;
  • Han, Seung Hyun (Dept. of Environmental Science and Ecological Engineering, Graduate School, Korea University) ;
  • Hwang, Jaehong (Forest Practice Research Center, National Institute of Forest Science) ;
  • Cho, Min Seok (Forest Practice Research Center, National Institute of Forest Science) ;
  • Son, Yowhan (Dept. of Environmental Science and Ecological Engineering, Graduate School, Korea University)
  • 안지애 (고려대학교 대학원 환경생태공학과) ;
  • 장한나 (고려대학교 대학원 환경생태공학과) ;
  • 박민지 (고려대학교 대학원 환경생태공학과) ;
  • 한승현 (고려대학교 대학원 환경생태공학과) ;
  • 황재홍 (국립산림과학원 산림생산기술연구소) ;
  • 조민석 (국립산림과학원 산림생산기술연구소) ;
  • 손요환 (고려대학교 대학원 환경생태공학과)
  • Received : 2016.01.22
  • Accepted : 2016.02.26
  • Published : 2016.03.31
⟨ Previous Next ⟩

Abstract

Seedling stage is particularly important for tree survival and is easily influenced by warming. Therefore, air temperature being increased due to climate change may affect physiological traits and growth of seedlings. This study was conducted to investigate the physiological and growth responses of Larix kaempferi seedlings to open-field experimental warming. 1-year-old and 2-year-old L. kaempferi seedlings were warmed with infrared lamps since April 2015 and April 2014, respectively. The seedlings in the warmed plots were warmed to maintain the air temperature to be $3^{\circ}C$ higher than that of the control plots. Physiological responses (stomatal conductance, transpiration rate, net photosynthetic rate and total chlorophyll content) and growth responses (root collar diameter (RCD), height and biomass) to experimental warming were measured. Physiological and growth responses varied with the seedling ages. For 2-year-old L. kaempferi seedlings, stomatal conductance, transpiration rate and net photosynthetic rate decreased following the warming treatment, whereas there were no changes for 1-year-old L. kaempferi seedlings. Meanwhile, total chlorophyll content was higher in warmed plots regardless of the seedling ages. Net photosynthetic rate linked with stomatal conductance also decreased due to the drought stress and decrease of photosynthetic efficiency. In response to warming, RCD, height and biomass did not show significant differences between the treatments. It seems that the growth responses were not affected as much as physiological responses were, since the physiological responses were not consistent, nor the warming treatment period was enough to have significant results. In addition, multifactorial experiments considering the impact of decreased soil moisture resulting from elevated temperatures is needed to explicate the impacts of a wide range of possible climate change scenarios.

Keywords

Acknowledgement

Grant : 인위적 온난화 처리를 통한 산림의 영향분석 및 기후변화 대응 적응대책 연구

Supported by : 산림청