한국산림과학회지 (Journal of Korean Society of Forest Science)

한국산림과학회 (Korean Society of Forest Science)
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실외 실험적 온난화 및 강수 처리에 따른 소나무와 낙엽송 유묘의 초기 생장 특성

The Early Growth Performances of Pinus densiflora and Larix kaempferi Seedlings Under Open-field Experimental Warming and Precipitation Manipulation

  • 권보람 (국립산림과학원 산림기술경영연구소) ;
  • 조민석 (국립산림과학원 산림기술경영연구소) ;
  • 양아람 (국립산림과학원 국제산림연구과) ;
  • 장한나 (고려대학교 환경생태공학과) ;
  • 안지애 (국립생태원 복원연구실) ;
  • 손요환 (고려대학교 환경생태공학과)
  • Kwon, Boram (Forest Technology and Management Research Center, National Institute of Forest Science) ;
  • Cho, Min Seok (Forest Technology and Management Research Center, National Institute of Forest Science) ;
  • Yang, A-Ram (Division of Global Forestry, National Institute of Forest Science) ;
  • Chang, Hanna (Department of Environmental Science and Ecological Engineering, Korea University) ;
  • An, Jiae (Division of Restoration Research, National Institute of Ecology) ;
  • Son, Yowhan (Department of Environmental Science and Ecological Engineering, Korea University)
  • 투고 : 2020.01.22
  • 심사 : 2020.03.10
  • 발행 : 2020.03.31
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초록

본 연구는 기후변화와 관련하여 양묘과정에서 온도와 강수 변화에 따른 주요 침엽수의 생존 및 생장 특성 변화를 알아보고자 수행하였다. 소나무와 낙엽송 노지묘(1-0)를 대상으로 대조구 기준 3℃의 온도를 상승시키거나 ±40%의 강수를 조절한 6처리 생육환경[온도 2처리(대조: TC, 증가: TW) × 강수 3처리(대조: PC, 감소: PD, 증가: PI)] 실외 실험구를 조성하였으며, 생존율, 근원경, 묘고, 물질생산량 및 묘목품질지수 변화를 조사하여 이원분산분석을 수행하였다. 소나무는 온도와 강수 처리에 따른 생존율 차이가 없었지만, 강수가 증가할수록 묘목품질지수가 낮아지는 경향을 보였다. 낙엽송은 온도 상승과 강수 감소에 따라 고사율이 증가하였으며, 묘목품질지수는 두 요인 간 상호작용을 보이면서 온도대조-강수증가 처리구에서 가장 낮게 나타났다. 따라서 양묘과정에서 소나무는 강수 증가, 낙엽송은 온도 증가 또는 강수 감소에서 낮은 묘목 생산량과 품질이 예상되며, 기후변화에 따른 두 수종의 특이적 민감도를 확인할 수 있었다. 향후 지구온난화와 가뭄·폭우 등의 강수 변화에 의해 수종별 묘목 생존과 품질의 변화가 예상되기 때문에 각 수종의 생육 반응 특성에 따른 적합한 양묘시업 대응 전략이 필요할 것으로 판단된다.

This study aimed to investigate the effects of climate change on the survival and growth performance of Pinus densiflora and Larix kaempferi seedlings using open-field experimental warming and precipitation manipulation. We measured the survival rate, root-collar diameter, and height, and then calculated the seedling quality index (SQI) of 2-year-old seedlings under 6 treatments [2 temperatures (TC: Control; TW: Warming) × 3 precipitation manipulations (PC: Control; PD: Decreased; PI: Increased)] and performed a two-way ANOVA to test for differences.The air temperature of the warming plots was 3℃ higher than that of the control plots, while the precipitation manipulation plots received ±40% of the precipitation received by the control plots. Temperature and precipitation treatments did not significantly affect the survival rate of P. densiflora; however, the SQI of P. densiflora decreased with increasing precipitation. In contrast, the mortality rate of L. kaempferi increased with increasing temperature and decreasing precipitation. Furthermore, in L. kaempferi, TC × PI treatment resulted in the lowest SQI with a significant interaction effect observed between the two factors. In summary, low seedling production and quality should be expected in P. densiflora as precipitation increases and in L. kaempferi as temperature increases or precipitation decreases. These results indicate species-specific sensitivities to climate change of two plant species at the nursery stage. With the occurrence of global warming, the frequencies of drought and heavy rainfall events are increased, and this could affect the survival and seedling quality of tree species. Therefore, it is necessary to improve nursery techniques by establishing new adaptation strategies based on species-specific growth performance responses.

키워드

참고문헌

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