| At present,Guangxi Garden and Garden Expo has been successfully held for twelve years,and its construction has had an important impact on the urban development and greening level of Guangxi area.This study takes 14 urban exhibition gardens in Guangxi Guigang Garden Expo Park as the research objects,and draws up the principles of artificial plant division in the green space of the garden expo park through field research;explores the structural characteristics of artificial plant communities and landscape characteristics of stable communities in urban exhibition gardens of Guigang Garden Expo Park through sample site investigation,and draws the following conclusions.1.235 sample plots were laid within the 165 communities in the Urban Exhibition Park of Guigang Garden Expo Park.A total of 311 plant species were counted in the sample plots,belonging to 232 genera of 87 families and 298 species.Dicotyledonous plants are the main components of the artificial plant community in the urban exhibition park,and gymnosperm and fern species are rare in the community;plant species are relatively concentrated in a few families and have a high dispersion in the composition of families;the proportion of each plant type varies greatly,with the most herbaceous species;the ratio of evergreen to deciduous plants is mostly around 3:1;uncommon garden plants are mainly herbaceous plants,and common Common garden plants are mainly evergreen shrubs;common garden plants are mainly exotic or cultivated plants in terms of plant origin,and the ratio of native plants to exotic or cultivated plants in common garden plants is about 1:1.3;in terms of importance,plants in the tree layer are mainly large trees with lush foliage,plants in the shrub layer are mainly flowering shrubs and foliage plants,and lawn grasses in the herb layer occupy an absolute dominant position;seasonal changes The seasonal changes are mainly flowering plants with different flowering periods,concentrated in spring and summer,with a single species of seasonal foliage plants and a serious shortage of autumn colored foliage plants in terms of species and quantity;in terms of species composition,the similarity of artificial plant communities between the regions of the secondary exhibition garden was high.2.The plant configuration has a certain degree of fit with the theme of the area in which it is located,but the degree of fit is relatively low.3.The structure of artificial plant communities is mainly a composite structure of trees,shrubs and grasses,and the artificial plant communities in different plots are mainly fast-forming communities,followed by communities around buildings and wet communities.The results of species diversity comparison are tree-irrigation-grass structure > irrigation-grass structure >tree-grass structure > grass structure;plant community around the building >fast-forming plant community > wet plant community.Artificial plant communities with a high level of diversity,especially rich in plant species in the shrub layer and herb layer,and a high number of non-target plant species and vigorous growth in the herb layer.4.The results of the survey and analysis show that the urban exhibition park of Guigang Garden is rich in plant species,diverse in characteristic plants,rich in plant community levels,both ecological and landscape,versatile in landscape,with flowers and scenery in all seasons;the shortcomings lie in the tendency of plant quantity characteristics,insufficient characteristic plant species,disordered community levels,unreasonable structure,disproportion between native plants and cultivated plants,plant configuration and The optimization suggestions are to balance the use of various plants,carry out special design for characteristic plants,scientifically sort out the plant community levels,strengthen the development and utilization of native species,combine the plant configuration with the theme of the exhibition park and its regional culture,and develop effective maintenance and management measures. |
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