Abstract: Three-year-old plants of Paeonia lactiflora ‘Da Fugui’were potted after being sprayed with the different concentration combinations of gibberellin (GA₃ ) and rooting power (ABT) solution on Nov. 5 of 2003, kept in the shade until forced in a greenhouse on Feb. 5, 2004, and flowered during Ap r. 2 - 22. The results showed that the combination of GA₃ and ABT (1) Promoted the sprouting of flower buds uniformly, of which 150 mg/L GA₃ made the plants finishing sprouting in 2 - 3 days thatwasmuch less than 8 days in the control; (2) Significantly promoted flowering thatwas earlier about 10 days than in the control, but inflorescence of the population was prolonged one-fold with dispersed flowering; ( 3) Flowering rate was increased 20% and the highest was 93% in the treatment using 150 mg/L GA₃ alone, but the quality of cut-flower was totally better in 100 mg/L GA₃ ; (4) ABT promoted new-root formation and growth and had a positive effect in improving cut-flower quality. The treatment of combinated 100 mg/L GA₃ and 100 mg/L ABT had better comprehensive result for forcing culture.

Key words: Herbaceous peony, Paeonia lactiflora, Forcing culture, Gibberellin, Rooting powder