Abstract: Dianthus caryohyllus was used as experimental subject in the present study. Based on the different preservative mechanism of regents , the effect of chemical preservative on Dianthus caryophyllus wasexplored by comparing different reagent formulations and concentration combinations. The results showedthat the experimental group IV with sugar ( SUC) (8 g/L) + quinolin-8-l sulfate (8-HOS) (0. 3 g/L)+ gibberellin A3 ( GA3 ) (15 g/L) + vitamin C ( VC) (50 mg/L) had the best preservation effect oncarnation flowers. Comparing to the control ( CK1 ), the vase life of cut-flowers increased from 10 days to18 days under group IV. Compared with the commercially available flower agent ( CK2 ) , although thepreservation time was similar, however, the dosage of SUG and GA was effectively reduced while CaCl.replaced byvitamin C simultaneously. The new cut-flower preservative recipe reduces the production costwhich has a practical market application prospect.

Key words: Dianthus caryohyllus, preservative, Gibberellin