Abstract: Taking E pear No.2 as the experimental material, the effects of canopy relative light intensity, leaf photosynthetic efficiency of trellis transformed shape, spindle shape and small and sparse canopy shape on fruit quality and field yield were studied. The results showed that the average relative light intensity in the canopy was 71.58%, 72.78% and 50.96% for trellis transformed shape, spindle shape and small and sparse canopy shape respectively, and small and sparse canopy shape had ineffective light areas; the average net photosynthetic rates of leaves were 11.56, 11.39, 8.08 μmol CO₂/（m²·s）, respectively. The single fruit weight and soluble solid content of fruit with trellis transformed shape were 17.59% and 6.61% higher than those with small and sparse canopy shape; the field yield of the modified spindle shape was 47.80% higher than that of the reconstructed tree with trellis, and the field yield of the small and sparse canopy shape was 11.90% higher than that of the reconstructed tree with trellis, showing significant differences. The modified trellis shape and spindle shape of E pear No.2 significantly improved the wind and light permeability conditions of the tree, and the leaf photosynthetic efficiency was high, which laid the material foundation for improving the fruit quality and increasing the field yield.

Key words: E pear No.2, trellis transformation, simplified tree shape, yield, net photosynthetic rates