In order to screen out Camellia oleifera cultivars with high photosynthetic efficiency and to provide theoretical basis for varieties of evaluation ,introduction and cultivation of Camellia oleifera, photosynthetic parameters of fifteen Camellia oleifera cultivars were determined by Li-6400xt portable photosynthesis system, diurnal change ofphotosynthetic, photosynthetic-light response curves and photosynthetic-CO2 response curves for fifteen Camellia oleifera cultivars were determined and compared. The results showed that: (1) There are dif...