Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Seed Germination and Seedling Survival Rate of Pinus densiflora and Abies holophylla in Open-field Experimental Warming Using the Infrared Lamp

적외선등을 이용한 실외 실험적 온난화 처리에 따른 소나무와 전나무의 종자 발아 및 유묘 생존율

  • Cho, Min Seok (Forest Practice Research Center, Korea Forest Research Institute) ;
  • Hwang, Jaehong (Forest Practice Research Center, Korea Forest Research Institute) ;
  • Yang, A-Ram (Forest Practice Research Center, Korea Forest Research Institute) ;
  • Han, Saerom (Department of Environmental Science and Ecological Engineering, Korea University) ;
  • Son, Yowhan (Department of Environmental Science and Ecological Engineering, Korea University)
  • 조민석 (국립산림과학원 산림생산기술연구소) ;
  • 황재홍 (국립산림과학원 산림생산기술연구소) ;
  • 양아람 (국립산림과학원 산림생산기술연구소) ;
  • 한새롬 (고려대학교 환경생태공학과) ;
  • 손요환 (고려대학교 환경생태공학과)
  • Received : 2014.03.10
  • Accepted : 2014.05.29
  • Published : 2014.06.30
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Abstract

The purpose of this study was to investigate the effect of experimental warming using infrared lamps on seed germination and seedling survival rate of Pinus densiflora and Abies holophylla. The air temperature of warmed plots had been automatically maintained 3 higher than control plots. The percent germinations (%) of the two coniferous species were higher in warmed plots than in control plots, however a significant difference appeared only in A. holophylla. In addition, P. densiflora and A. holophylla showed the shorter mean germination time (days), higher germination rate ($seed{\cdot}day^{-1}$) and germination energy (%) in warmed plots than in control plots. A. holophylla showed a higher seedling mortality rate in the warmed plots than in control plots because of increased air and soil temperatures and decreased soil moisture. However, seedling survival rate of P. densiflora showed no significant difference by experimental warming. In the future, changed air and soil temperatures and soil moisture due to global warming will induce a variety of changes in seed germination and survival rate of tree species in nursery culture. Therefore, it is necessary to establish adaptation strategies that improve techniques in nursery culture against global warming.

본 연구는 지구 온난화와 관련한 대응 대책 마련을 위해서 대기 온도 상승에 따른 주요 침엽수의 종자 발아 및 발아 후 유묘의 생존율 변화를 알아보고자 수행하였다. 소나무와 전나무를 대상으로 적외선등을 이용하여 대조구 보다 온난화 처리구의 대기 온도를 $3^{\circ}C$ 높게 유지하는 실외 실험적 온난화 처리를 실시하였다. 온난화 처리에 따른 대기 온도 상승으로 두 수종 모두 발아율이 높아지는 경향을 보였지만, 전나무에서만 유의적 차이가 나타났다. 소나무와 전나무 두 수종 모두 온난화 처리구가 대조구보다 평균발아일수는 유의적으로 감소하였으며, 온난화 처리구에서 높은 발아속도와 발아세를 보였다. 온도 상승과 토양 수분 감소에 따라 전나무 유묘의 고사율은 증가하였지만, 소나무는 온난화 처리에 따른 차이를 보이지 않았다. 향후, 지구 온난화에 따른 대기와 토양 온도 상승 및 토양 수분감소로 양묘과정에서 종자 발아 및 유묘 생존율의 변화가 예상되기 때문에 지구 온난화에 대응할 수 있는 양묘기술 개선이 필요할 것으로 판단된다.

Keywords

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