Abstract: Efects of pretreatments by ultrasonic wave or／with preservative solution on water conditions in cut
rose ‘Samantha’ were studied．The results showed that the water condition in flower stem in 6 h after vase and
during vase were improved obviously by three types of treatments compared with control， such as it is increased in
var)ring degrees to the water potential of diferent position of flower stem，the fresh nlass，the relative water content．
and the balan ce between water uptake an d lOSS amount in the flower stem， SO tllat be tter water conditions are
kept，an d vase life is prolonged in varying degrees． Among thre typ~s of pretreatm ents the efect by ultrasonic
wave combined wi th preservative solution Was the be st， then were pretreatments by the preservative solution an d ultrasonic
wave respectively． Possible mechanism on keeping better water conditions after treatm ents by ultrasonic
wave alone an d comb ined with preservative solution Was discussed according to hollow action of ultrasonic wave and
the components an d role of preservative solution．

Key words: Cut rose, Ultrasonic wave, Preservative solution, Pretreatm ent, Water condition