Introduction And Cultivation Of 10 Resistant Peonies In Changchun

10 cultivated cold resistant peonies ‘Yeguang Bei’‘Heping Lian’‘Juhua Fen’‘lan He’‘Heitian E’‘Wulong Pengsheng’‘Hu Hong’‘Zhao Fen’‘Shanhu Tai’‘Zangzhi Hong’ were used as experimental materiols to examine the phenological period,growth characteristics and ornamental comprehensive evaluation in this studry and the cold resistant varieties were investigated and evaluated in order to provide theoretial basis for the further development and utilization of cold resistant peony which would enrich the varieties of Changchun flower seedlings and landscape colors.The main results are as follows:(1)The phenological periods of 10 resistant peonies introduced and cultivated areas are quite different,but with the extension of planting time and the protection of cold prevention measures,the adaptability of each peony variety is gradually enhanced,and the phenological period basically tends to be stable;The number of flowering branches reaches 3-9;The growth of persistent branches is more than 12 cm,and some can reach 23cm;There was no obvious change in leaf morphology;The length of sprouting branches in that year can reach 20-40cm;The design and color basically maintain the original design and color;The flowering period was within 9-11 days,and these aspects showed a good growth state.The analysis of variance of the data from 2017 to 2019 shows that there are significant differences between each period of phenology and cold resistance.(2)The tolerance of 10 cold resistant peonies was comprehensively evaluated.It was concluded that the cold tolerance of 10 cold resistant peonies was from weak to strong: Tibetan branch red < coral platform < Zhao powder < Hu Hong < Oolong holding Sheng < peace lotus< chrysanthemum powder < luminous cup < blue lotus < black swan.The analysis of variance of the average cold resistance index from 2017 to 2019 showed that there were significant differences between varieties and cold resistance.(3)The analytic hierarchy process was used to comprehensively evaluate the ornamental characters of 10 cold resistant peonies.After establishing a comprehensive evaluation model suitable for cold resistant peony,combined with 8 ornamental evaluation indexes,the weight of stress resistance accounts for 19.2%,followed by 18.44% of germination ability and 17.88% of flowering period.The weight of residual factors such as growth is relatively small.Through the model evaluation,the ornamental grades of cold resistant peony varieties are divided into four kinds.Grade I(3-2.8): there are 4 species with excellent ornamental ability.are "luminous cup","chrysanthemum powder","black swan" and "Blue Lotus".Grade II(2.8-2.5): a kind of ’peace Lotus’ with good ornamental ability.Grade III(2.5-2): 4 species with good ornamental performance.are "Wulong Pengsheng","Hu Hong","coral Taiwan" and "Zang Zhi Hong".Grade IV(< 2): one species with general ornamental,named "Zhao Fen".