Effects of Shading on Photosynthetic Characteristics of Young Peach Trees

Photosynthetic characteristics under different shading treatments were investigated in different peach culti-vars with different low light-tolerance. The result showed that the trees could adapt to stress by decreasing light compensation point and night respiration rate, and increassing Gs. ,Tr. , relative Chl. b content. The results also showed that the adjustment ability of trees 30% shading was more obvious than that under 70% shading. Significant differences of adaptability were found among different varieties.