Preliminary Study on the Application of Paclobutrazol in the Regulation of Phalaenopsis Flowering-time

In this experiment,the paclobutrazol(PP 333) was used to regulate the flowering time of Phalaenopsis and the results showed:paclobutrazol could advance the early flowering time for a long time. Treated with the concentration of paclobutrazol in 5 mg/L its flowering time could be 14 days early compared with the check;in 10 mg/L, 10 days early;in 20 mg/L,16 days early and in 40mg/L,13 days early.All the treatments could decelerate the nourishment growth and reduced the finally height of flower-stalk, but it had no influence on the diameter of flowers and the whole number of flowers.