Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
권호 표지

Optimum Light Intensity and Fertilization Effects on Physiological Activities of Forsythia saxatil

산개나리의 생리적 활성에 대한 최적 광도 조건과 시비 효과

  • Kim, Gil Nam (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Han, Sim-Hee (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Kim, Du Hyun (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Yun, Chung-Weon (Department of Forest Resource, Kongju National University) ;
  • Shin, Soo Jeong (Department of Wood and Paper Science, Chungbuk National University)
  • 김길남 (국립산림과학원 산림유전자원부) ;
  • 한심희 (국립산림과학원 산림유전자원부) ;
  • 김두현 (국립산림과학원 산림유전자원부) ;
  • 윤충원 (국립공주대학교 산림자원학과) ;
  • 신수정 (충북대학교 목재종이과학과)
  • Published : 2013.09.30
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Abstract

The leaf growth and physiological characteristics of Forsythia saxatilis were investigated under different relative light intensities (RLI) and fertilization levels in order to find out the optimum environmental conditions for in-situ restoration. RLI and fertilization were four levels (30%, 43%, 63% of full sun and full sun) and three levels (non-fertilization, 2 times and 3 times of average forest soil in Korea), respectively. According to the increase of fertilization level under all RLI, leaf area increased and leaf dry weight and the ratio of leaf dry weight to leaf area decreased. As the fertilization level increased, photosynthetic pigment contents such as chlorophyll a, b and carotenoid under all RLI decreased. And pigment contents were the highest under full sun in the same fertilization level. Foliar nitrogen content under fertilization was higher than that under non-fertilization, and chlorophyll/nitrogen ratio decreased with the increase of fertilization level under all RLI. The increase of photosynthetic rate was observed with the increase of fertilization level at 63% of RLI and full sun, and dark respiration rate under fertilization was lower than under non-fertilization. Apparent quantum yield was lower at non-fertilization than that of fertilization, and it was highest at 63% of RLI under the same fertilization level. In conclusion, leaf growth and physiological characteristics of F. saxatilis could be improved under higher light conditions and fertilization.

본 연구는 산개나리의 현지 내 복원을 위한 최적 생육환경을 찾기 위하여, 광도 및 시비수준이 다른 환경에서 생육한 산개나리의 잎 특성 및 생리적 특성을 조사 및 분석하였다. 광도는 30%, 43%, 63%, 100%로 하는 4수준으로 하였고, 시비는 우리나라 평균산림토양 NPK 함량을 기준으로 무시비, 2배, 3배로 처리하였다. 산개나리의 잎 특성은 모든 피음 처리구에서 시비수준이 증가할수록 잎 면적은 뚜렷하게 증가하였고, 잎 건중량과 건중량 대 면적의 비는 시비수준이 증가할수록 감소하였다. 동일 시비수준에서는 광 증가와 함께 잎 면적이 감소하면서, 잎 건중량과 건중량 대 면적의 비는 증가하였다. 산개나리 잎 내 광색소 함량은 모든 피음 처리구에서 시비수준이 증가할수록 감소하였고, 같은 시비수준에서 잎 내 광색소 함량은 광이 증가할수록 높은 값을 보였다. 산개나리 잎 내 질소 함량은 모든 피음 처리구에서 무시비보다 시비 처리구에서 높은 값을 나타냈으며, 질소 함량에 대한 엽록소 함량의 비(Chl/N)는 시비량이 증가할수록 감소하였다. 광합성 속도는 전광의 63%와 전광 처리구에서 시비량이 증가할수록 높게 나타났으며, 암호흡 속도는 모든 피음 처리구에서 무시비보다 시비 처리구에서 낮은 값을 나타냈다. 또한, 순양자수율은 모든 피음 처리구에서 무시비보다 시비 처리구에서 높은 값을 나타냈으며, 동일 시비수준에서는 전광의 63% 처리구에서 가장 높은 값을 나타냈다. 결론적으로 산개나리의 잎 형태와 생리적 특성은 높은 광 조건 및 토양시비 처리를 통해 개선할 수 있다.

Keywords

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