Abstract: Two shading treatments， aluminium foil with the shading rate of 85%-90% and blackout cloth with the shading rate of 100%， were used in the bagging experiment on Cymbidium Plair ‘Days Memory and C. Royal Red ‘Princess Nobuko in order to increase the height of flower stalk and ornamental value. The result showed that the inflorescence height， inflorescence ratio and floscule spacing of Cymbidium Plair ‘Days Memory and C. Royal Red ‘Princess Nobuko significantly increased by 7892 cm and 13125 cm， 0484 cm and 0685 cm， 0039 0 and 0038 8 respectively after bagging. Two shading treatments can both significantly increase the inflorescence quality， inflorescence height， inflorescences ratio and floscule spacing increased 662 cm， 00808 and 0688 cm in the treatment of blackout cloth with the shading rate of 100%， and increased 1276 cm， 00964 and 0958 cm in the treatment of aluminium foil with the shading rate of 85%-90%. However， the buds grew abnormally in the treatment of blackout cloth with the shading rate of 100%， which could not blossom. Compared with the control， the flowering time in the bagging treatment was delayed to 10-15 d later．

Key words: Cymbidium, bagging, inflorescence elongating