To investigate an effective way to break dormancy in Lily bulbs,Siberian Lily bulbs were used to study the effects of low temperature and GA3 on the morphological and physiological changes,the change of endogenous GA3 in different temperature and different parts of lily bulbs.The results showed that,the ratio of bud length and total height of bulbs reached 67.954%,the bud growth point located at the 2/3 vertical height of bulb,and the time spent on dormancy releasing was minimum under the treatment of low t...