| In this paper,124 roads in Baoan district of Shenzhen are selected as the research objects,and 7 aspects such as the layout of the road cross section,the species of the garden plants,the ornamental characteristics of the plants,the frequency of plant application of the road greening belt,the plant configuration mode of the road greening belt,the landscape evaluation of the plant community and the characteristics of the soil in the road green space are investigated and studied.Through the analysis and summary of the research results,this paper discusses the existing problems of road greening in Baoan of Shenzhen and the suggestions for optimization and improvement of the plant species,and the specific results are as follows:1.A total of 124 roads(sections)were surveyed in the survey.The survey found that there are four types of cross-section layouts in the area: One road plate with two greenbelts,Two road plates with three greenbelts,Three road plates with four greenbelbelts,Four road plates with five greenbelts.Through statistics,it is concluded that the crosssection layout of roads in this area has the largest number of roads with one road plate with two greenbelts,and the minimum is Four road plates with five greenbelts.2.There are 171 kinds of landscape plants were investigated.According to the plant classification system,167 species of angiosperms,3 species of gymnosperms and 1 species of pteridophyte were classified;there were 57 families and 128 genera were divided according to ecological habits,including 75 species of trees,65 species of shrubs,and31 species of herbs.Among the arbor species,there are 15 deciduous species trees and 60 species evergreen trees species tree.The ratio of deciduous trees to evergreen trees is 1:4.In native plants,there are 90 native plants and 81 exotic plants;in terms of ornamental characteristics,there are 77 species of flowering plants,12 species of ornamental fruit plants,53 species of foliage plants,and 40 species of beautiful Posture plants.3.A total of 37 species of roadside trees belonged to 18 families and 27 genera.the maximum use frequency was Terminalia neotaliala and Ficus microcarpa,both reaching23.39%.The top ten tree species with application frequency is: Terminalia neotaliala,Ficus microcarpa> Cinnamomum camphora> Khaya senegalensis> Bischofia javanica>Khaya senegalensis>Ficus altissima> Ficus virens var.sublanceolata> Dracontomelon duperreanum> Mangifera indica> Roystonea regia.4.Statistics on the types of green-belt plants and the frequency of their application.The central separation green-belt has the most abundant species that including 123 kinds of garden plants,the roadside green-belt has 103 kinds,and 33 kinds on traffic island.Regarding the frequency of plant applications.Also,the top ten plant species in the frequency of green belt use are all common garden plants in South China.5.The road greenbelt plant configuration pattern : The central separation greenbelt plant configuration mode is arbor + shrub,arbor + shrub + herb,shrub + shrub,shrub +herb;the roadside greenbelt plant configuration mode is arbor + shrub + herb,arbor +shrub,arbor,shrub + herb;traffic island green plant configuration model for arbor + shrub+ herb,shrub + herb,herb.6.The AHP analytic hierarchy process was used to evaluate 24 typical plant landscape in Baoan district road greening.The results showed that the landscape quality was one level are 4 samples,accounting for 16.6% of the total number,the landscape quality was second level are 12 samples,accounted for 50% of the total number,and the landscape quality was three level and 8 samples,accounted for 33.4% of the total number.It shows that plant landscaping level of road greening in Baoan district is general.Most plant landscaping plants are more common.7.Sampling tests were conducted on some road greenbelt soils in Baoan district.The soil texture of the road greenbelt tested in Baoan district was dominated by sandy loam and sandy soil;the pH of road greenbelt tested in Baoan district was alkaline;the Baoan district was tested.Soil organic matter content in road green space was at a moderately lower level;road greenbelt soil in Baoan district was not affected by salt damage;road greenbelt tested in Baoan district had low levels of nitrogen and phosphorus,and potassium was at a uppermiddle level.8.At the end of the article,discussedthe problems existing in the road greening in the region,and the suggestions for optimization and recommendations for plant species were made. |
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