Investigation And Study On The Application Of Native Tree Species In Handan City

In this paper,the object of the study is the native tree species in the broad sense,and the green area in the built-up area of Handan is taken as the research area.Based on a large number of related literatures,the stratified random sampling survey method is used to conduct field survey,and combined with local experts'.The paper analyzed the application of native tree species in garden green space of Handan City,and evaluated the native tree species in Handan City by using comprehensive evaluation system to get the application value of native tree species in local garden green spaces.The main results are as follows:(1)There were 130 native species in 84 genera and 41 families in Handan City,accounting for 62.2% of the total investigated tree species,accounting for 65.6% of the total number.There are 71 species of native trees,51 species of native shrubs and 8 species of woody vines.According to the analysis of the survey data,the native tree species were mainly distributed in Rosaceae,with 10 genera and 26 species,accounting for 20.0% of the total species of native tree species investigated,followed by a limited number of subjects,such as Leguminosae,Oleaceae,Caprifoliaceae.(2)The distribution and quantity of native tree species of five kinds of garden greenbelt types were investigated.The results showed that the distribution of native tree species was different in different types of green space.Park green space has the most types,117 kinds,followed by residential green space,traffic green space due to the limitations of the type of the least.The phenomenon of arbor more than shrub is common in all types of green land,which also shows that native trees are more widely used in the garden green land of Handan than native shrubs.(3)In the garden green land the higher frequency of the native tree species are Sophora japonica,Salix babylonica,Platanus orientalis,Lagerstroemia indica,Phellodendron amygdalus,Rose chinensis,Euonymus japonicus,Hibiscus syriacus,Punica granatum,Jasminum nudiflorum.The use of high frequency of limited native tree species play an important role in Handan City,the backbone of tree species.The order of richness index and diversity index is arbor,shrub and woody vines.And the richness index and diversity index of the tree species were the highest in the residential area,and the richness index and the diversity index were the highest in the residential area,the arbor,the shrub,the woodland,the green land,the green land and the traffic.The evenness index of residential area is the largest.(4)The comprehensive evaluation index of native tree species was Salix babylonica,Toona sinensis,Fraxinus chinensis and Gleditsia sinensis.The shrub had Lonicera maackii,Sambucus williamsii and Xanthoceras sorbifolia.The woody vines were Rosa multiflora,Mordencvs.of Chlimbers and Ramblers and Wisteria sinensis.On the basis of the comprehensive evaluation,combined with the actual application frequency analysis of native tree species in the garden,17 kinds of native tree species which were excellent but not widely used were selected and recommended.(5)Based on the investigation and analysis,this paper puts forward four suggestions for the application of native tree species in Handan.They are expanding shrub native tree species application,optimizing the local tree species structure,increasing the frequency of application of excellent native tree species,developing and expanding of application of native tree species resources reasonably,increasing the local tree species landscape and highlighting local characteristics...