다양한 광환경에 대한 음나무 유묘의 생장특성과 엽록소 함량, 파장별 흡광도, 광합성 속도 등 광합성 특성을 조사하였다. 엽면적, 엽병길이 , RGR은 낮은 광조건에서 생장시킨 개체에서 크게 나타났고, SLW는 강한 광조건에서 각각 생장한 개체에서 높았다. 엽록소 함량은 염록소 a, 엽록소 b, 엽록소 a+b 함량 등은 낮은 광조건에서 생장시킨 개체에서 높았고, 엽록소 a/b 율은 강한 광조건에서 각각 생장한 개체에서 높았다. 광합성 유효파장역에서 평균 흡광값은 음엽이 0.75로 양엽의 0.70보다 높았다. 광합성 속도는 강한 광조건에서 생장한 개체가 높은 광합성 속도를 나타내었다. 광포화점은 전광조건 하에서 생육시킨 유묘에서 $700;{mu}mol{cdot}m^{-2}{cdot}s^{-1}$, 임내광 조건에서 생육시킨 조건에서 $300;{mu}mol{cdot}m^{-2}{cdot}s^{-1}$이었고, 생장상의 강광조건에서는 $500{;}{mu}mol{cdot}m^{-2}{cdot}s^{-1}$, 약광조건에서는 $300{;}{mu}mol{cdot}m^{-2}{cdot}s^{-1}$이었다.
This study was carried out to determine leaf photosynthetic capacity and growth characteristics of Kalopanax picturs Nakai seedlings under the different light condition. The seedlings grown under low light condition showed larger leaf area and petiole, and higher relative growth rate than those grown under high light condition. Chlorophyll contents as chlorophyll a, chlorophyll b, and chlorophyll a + b were high in the seedlings grown under highlight condition compared to those grown in low light conditions. The mean absorption value of shade leaf within photosynthetically active radiation (400-700 nm) was slightly higher than that of sun leaf, Leaf photosynthetic capacity of seedling was variable under the different light conditions. Seedling grown under high light condition had the higher photosynthetic capacity. Leaf photosynthetic rates under forestry and nursery were 700 and $300;{mu}mol{cdot}m^{-2}{cdot}s^{-1}$, respectively. However, leaf photosynthetic rates under high and low light conditions were 500 and $300;{mu}mol{cdot}m^{-2}{cdot}s^{-1}$, respectively.
