The Research Of Plant Community Configuration Structure In Jinjiangshan Urban Park

Plant communities are the important components in urban parks,and their quality are directly related to the whole landscape quality of urban parks.And the park plant community dominated by artificial disposition,how to approach natural vegetation more structurally and functionally,then give full play to ecological and landscape functions,they are the key to the construction of urban green space system.This paper takes main garden green spaces in Dandong urbanpark as the object of investigation and analysis,based on field date.In this study,20 plant communities of Jinjiangshan urban park were chosen to analyze their floristic features,stand type and quantitative characteristics of plants and so on,summarize the phytocoenosium and landscape conditions of Jinjiangshan urban park,it provides a basis for the selection of plant species and plant designs in urban parks in Dandong city.The main findings are as follows:It turns out that:Among the 20 artificial communities,There are 61 species of plants,belonging to 26 famlies,40 plots.Among them,rosaceae has the highest application rate,next is the family of osmanthus,leguminous,pinaceae.The rate of alien introduced to artificial community was 57%,there are relatively few native tree species.There are 13 species of trees with an important value of more than 3 percent,the order is from high to low: Dandong juniper,elum of jinye,gingko,oriental arborvitae,michelia alba and so on;There are 14 species of shrubs with an important value greater than 3 percent: Lobular boxwood,texus chinensis,purple leaf barberry,juniper,flowering plum,maple and so on.These species constitute the main dominant species in Jinjiangshan urban park of Dandong city.The height of tree in artificial forest is distributed between 0 and 8.0 meters,the tree diameter grade structure is mainly distributed in 0-10cm;Shrub are highly concentrated between 0-2 meters.Overall,there are more young plants and less young adult species in the park.In the woody plants investigated,the ratio of evergreen to deciduous species is about 0.3:1.The main plant species in the park are deciduous plants.the proportion of evergreen tree and deciduous plant species is appropriate,but in the shrub layer,the proportion of evergreen plants is slightly smaller.The application frequency ratio of tree and shrub species is 1.8:1,the application frequency of tree species is generally higher than that of shrubs.The healthy plant condition in Dandong Jinjiangshan urban park at level one,the plants are in good health,individual trees and shrubs appear 3,4,5 level.Generally speaking,the maintenance management level of the park is relatively high.The vertical structure of plant communities is abundant,the density of trees and shrubs is high.In the park,there are a wide variety of plant species,such as shape,flowers and leaves.On the whole,the species diversity of the survey community is high.