차광률이 상록활엽수 4수종의 생장특성 및 광합성에 미치는 영향

Effects of Shading Rates on Growth Characteristics and Photosynthesis in Four Broad-leaved Evergreen Trees

This study was conducted to assess the potential as indoor plants of four broad-leaved evergreen trees grown in tropical and subtropical moist forests that have ornamental value. Osmanthus fragrans var. aurantiacus Makino, Litsea japonica (Thunb.) Juss., Photinia glabra (Thunb.) Maxim., and Pittosporum tobira (Thunb.) W.T. Aiton were investigated to compare the effects of morphological and physiological changes under different shading rates. The four species were cultivated for seven months under five different shading treatments(0, 35, 50, 75, 95%) and then measured to analyze any changes in plant height, leaf length and width, the number of leaves and shoots, chlorophyll contents, photosynthetic capacity, and light compensation point. The overall growth of four species was good under 0~75% shading. L. japonica and P. tobira showed the well-grown under 95% shading and total chlorophyll contents showed similar trends to the growth. The photosynthetic capacity under 0% shading showed highest in 3 species except P. glabra. The light compensation point of O. Fragrans, L. Japonica, P. glabra, and P. tobira were relatively about 19.36μ㏖ㆍm⁻²s⁻¹(968lux), 5.46μ㏖ㆍm⁻²ㆍs⁻¹(273lux), 11.30μ㏖ㆍm⁻²s⁻¹(565lux), and 6.62μ㏖ㆍm⁻²s⁻¹(331lux).