Effect of Different Irrigation Period on Photosynthesis and Growth Performances of Containerized Seedling of Eucalyptus pellita and Acacia mangium

관수 주기가 Eucalyptus pellita와 Acacia mangium 용기묘의 광합성 및 생장에 미치는 영향

  • Lee, Soo-Won (Forest Practice Research Center, Korea Forest Research Institute) ;
  • Cho, Min-Seok (Forest Practice Research Center, Korea Forest Research Institute) ;
  • Kim, Gil-Nam (Department of Environment and Forest Resources, Chungnam National University)
  • 이수원 (국립산림과학원 산림생산기술연구소) ;
  • 조민석 (국립산림과학원 산림생산기술연구소) ;
  • 김길남 (충남대학교 산림자원학)
  • Received : 2010.03.31
  • Accepted : 2010.05.03
  • Published : 2010.06.30

Abstract

The objective of this study was to find optimal water condition of containerized seedling production of two tropical species for high seedling quality. This study was conducted to investigate photosynthesis, water use efficiency(WUE), Stomatal conductance(gs) and growth performances of containerized seedlings of Eucalyptus pellita and Acacia mangium growing under three different irrigation periods (1 time/1 day, 1 time/2 days and 1 time/3 days). E. pellita showed outstanding photosynthetic capacities at 1time/1day irrigation and A. mangium showed good photosynthetic capacity at all treatments. As irrigation period were shortened, gs of two species increased, while WUE of two species decreased. Root collar diameter and height of two species were the highest at 1 time/1 day irrigation, while the lowest at 1 time/3 days irrigation. As irrigation period were shortened, H/D ratio, biomass and seedling quality index (DQI) of two species increased but T/R ratio of two species showed the opposite tendency. These results showed that 1 time/1 day irrigation is optimal water condition of containerized seedling production of two tropical species and irrigation controlling is very important for growth and seedling quality of containerized seedling.

본 연구에서는 Eucalyptus pellita와 Acacia mangium 용기묘를 대상으로 관수 주기 처리를 통해 3가지 수준(1회/1일, 1회/2일, 1회/3일)으로 수분 조건을 달리하여 광합성, 수분이용효율, 기공전도도 및 생장 특성 변화를 조사 분석하였으며, 열대림 두 수종에 대한 용기 양묘 시 최적의 수분 환경을 구명 하고자 하였다. 그 결과, E. pellita는 1회/1일 관수 처리구에서 우수한 광합성 능력을 보였으며, A. mangium은 세 처리구 모두 좋은 광합성 능력을 나타냈다. 두 수종 모두 관수 주기가 짧을수록 기공전도도는 높아진 반면, 수분이용효율은 낮은 값을 보였다. 근원경과 간장 생장은 두 수종 모두 1회/1일 관수 처리구에서 높았으며 관수 주기가 짧을수록 높은 생장을 나타냈다. H/D율, 물질생산량 및 묘목품질지수(DQI)도 같은 경향을 보였으나, T/R율은 반대의 경향을 나타냈다. 1회/1일 관수 처리구는 건전하게 양묘된 묘목으로 평가할 수 있으며, 세 처리구 중 가장 우수한 묘목을 생산할 수 있는 수분 조건으로 판단된다.

Keywords

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