Study On The Technology Of Multil-seasonal Production Of Herbaceous Peony Cut Flowers

Herbaceous peony(Paeonia lactiflora)is a traditional famous flower in China, and the multi-seasonal production of its cut flowers forms an important part of herbaceous peony industrilasiton. Selecting the proper cultivars endurable for storage lays the foundation of providing abundant high-qualitied cut flowers, as well as the effecitve forcing culture technology and procedure for the Spring Festival. The storage durability of 24 cultivars of herbaceous peony was evaluated by the low-temperature storage experiment; and the technology and procedure of forcing culture for Spring Festival on'Taohuafeixue'and'Dafugui'which is feasible for cut flower is studied. The main results are as follows:1.storage-endurable cutivars'Ling long yu'and'Tao hua fei xue', whose storage duration was 130 days and 120 days respectively, was selected from 24 herbaceous peony cultivars according to their vase-life, flower diameter, flower rate and infection rate after low–temperature storage, comparing with'Qiao ling', whose storage duration was 40 days. The storage durability is directly related to cultivars, but not directly related to flower type, florescence and flower colour. The environmental temperature is another important factor to vase-life of flower besides storage duration, proved by the prolonged vase-life under lower environmental temperature and vice verse.2.GA3 is effective to release the dormancy of flower bud and promote the branches and leaves grow. Herbaceous peony with GA3 treatment within a certain range of density can germinate and develop under proper temperature, and the growing speed is in positive correlation with GA3 density, but relatively more easily to abort in later stage.3. Dormancy of'Tao hua fei xue'is released and flowers indution is completed under the condition of 4℃storage for 6-7 weeks. Predating florescence and maximum flower rate require different storage duration respectively: 7 weeks storage is optimum for predating florescence while 6 weeks storage for the latter.4. Flowering rate and qulity of cut flower is improved by GA3 treatment, and the most benefit GA3 density is determined by the particular cultivar: for'Tao hua fei xue', it is 200mg/L, and'Da fu gui'150mg/L.