Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Growth and Physiological Response in Container of Daphniphyllum macropodum by Shading Level

피음 수준에 따른 굴거리나무의 용기 내 생장 및 생리적 반응

  • Song, Ki Seon (Forestry Knowledge Service Division, Korea Forestry Promotion Institute) ;
  • Kim, Jong Jin (Department of Forestry and Landscape Architecture, Konkuk University)
  • 송기선 (한국임업진흥원 임업지식서비스단) ;
  • 김종진 (건국대학교 산림조경학과)
  • Received : 2017.01.23
  • Accepted : 2017.03.14
  • Published : 2017.03.31
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Abstract

This study was carried out in order to closely examine the growth and the physiological response by shading levels of a container seedling of Daphniphyllum macropodum which is known as the species of having shade tolerance in a warm temperature evergreen broad-leaved tree. The shading treatment was regulated with the shading level of full sunlight, and 35%, 55%, 75% of full sunlight. As a result of surveying the height and the root collar diameter growth by the shading level, the height was the highest with 13.2 cm under 35% of shading. The root collar diameter was the highest with 4.99 mm under full sunlight. The organ-based (leaves, shoot and root) dry mass production and the whole dry mass production were higher with 1.38 g, 0.47 g, 0.87 g, 2.72 g, respectively, in order of 35% shading. As for chlorophyll a, b, and the total chlorophyll content, the highest chlorophyll content was shown under 75% of shading with the relatively highest shading level. The ratio of chlorophyll a to chlorophyll b (a/b) was the highest under 35% of shading. The photosynthetic rate, stomatal conductance and water use efficiency were the highest with $12.3{\mu}molCO_2{\cdot}m^{-2}{\cdot}s^{-1}$, $0.27molH_2O{\cdot}m^{-2}{\cdot}s^{-1}$, $3.53{\mu}molCO_2{\cdot}mmol^{-1}H_2O$, respectively, under 35% of shading. As a result of surveying the whole experiment, D. macropodum grows nicely by maintaining 35% shading.

본 연구는 내음성이 있는 수종으로 알려진 난대 상록활엽수인 굴거리나무 용기묘를 대상으로, 피음 수준에 따른 생장과 생리적 반응을 알아보고자 실시되었다. 피음은 전광과 전광의 35%, 55%, 75% 수준으로 조절하여 처리하였다. 피음 수준에 따른 1년생 용기묘의 간장과 근원경 생장 조사 결과, 간장은 35% 피음에서 13.2 cm로 가장 컸으며, 근원경은 전광에서 4.99 mm로 가장 굵었다. 잎, 줄기, 뿌리 및 전체 건물생산량은 모두 35% 피음에서 각각 1.38 g, 0.47 g, 0.87 g, 2.72 g으로 높았다. 엽록소 a, b 및 총 엽록소 함량은 상대적으로 피음 수준이 가장 높은 75% 피음에서 가장 높았으며, 엽록소 a/b율은 35% 피음에서 가장 높게 조사되었다. 광합성 속도, 기공전도도 및 수분이용효율은 35% 피음에서 각각 $12.3{\mu}molCO_2{\cdot}m^{-2}{\cdot}s^{-1}$, $0.27molH_2O{\cdot}m^{-2}{\cdot}s^{-1}$, $3.53{\mu}molCO_2{\cdot}mmol^{-1}H_2O$로 가장 높았다. 이러한 결과를 종합하면, 내음성이 있는 굴거리나무는 35% 피음 수준이 생육에 적정한 것으로 판단된다.

Keywords

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