Abstract: In order to investigate the effect of edible fungus residue application with chemical fertilizer on photosynthesis characteristics of flag leaf and grain yield of rice， a pot experiment was carried out including 9 treatments with different proportions of edible fungus in combination with chemical fertilizers. The changes in photosynthetic rate and SPAD index of flag leaf during grain filling period as well as grain yield were also analyzed. The results were as follows: During the grain filling period， the highest SPAD index was observed in the treatment with 100% chemical fertilizer and 100% edible fungus residue， while the highest photosynthetic rate of flag leaf was in the treatment with 100% chemical fertilizer and 50% edible fungus residue. In addition， the highest grain yield was found in treatment with 100% chemical fertilizer and 100% edible fungus residue. As a result， application of edible fungus residue in combination with chemical fertilizers could improve the leaf photosynthesis of rice during grain filling period， at the same time the grain yield was also increased.

Key words: edible fungus residue, chemical fertilizer, photosynthetic rate, SPAD, rice yield