Study On Green Space Plant Community In Xinxiu Park Of Nanning City

Urban green space is a collection of various types of green space with plant community as a unit.This paper takes the green space of Xinxiu Park in Nanning as the research object,and makes a systematic investigation on the plant community in the whole park.First of all,through the field survey of various types of green space in the early stage,the plant communities of Park(artificial)green space are divided into 6 types: Centralized plant community,Plant community beside building,Roadside-tree community,Hygrophyte community,Aquatic macrophyte community and other plant communities,and the division standards and principles are formulated;On this basis,the method of community science was used to investigate the sample plots of the whole garden by taking each plant community unit as a unit;Quantitative study on species composition,community structure and species diversity of plant communities,and in-depth study on typical plant communities in park green space;On the basis of comprehensive analysis,the advantages and disadvantages of plant communities in Xinxiu park were summarized.The main results are as follows:(1)According to the division rules,there are 81 plant communities(including 4 aquatic communities)that meet the community standards in the green space of Xinxiu park.(2)There are 72 families,164 genera and 225 species of plants in the plant community of the park green space.In terms of the composition of families,genera and species,the proportion of the total number of families,genera and species of dicotyledons is the highest,the phenomenon of dominant families of plants is obvious,and the plants are mainly concentrated in few species and single species;The life forms of plants are relatively complete,the shrub species are the most abundant,the woody plants are dominated by evergreen trees,the herbaceous plants are dominated by perennial plants,and there are many kinds of weeds;As for the source,there are few native plants,and the overall application proportion is only 48.00%;The ornamental characteristics are as follows: the ornamental types are relatively complete,mainly leaf plants,followed by flower plants and fruit plants,and the fragrant plants are the least;The quantitative characteristics of plants are as follows:the arbor layer is dominated by Ficus microcarpa,Livistona chinensis and Ficus benjamina,while the shrub layer has no obvious dominant plants,and the herb layer is dominated by Ophiopogon bodinieri and Zoysia matrella.(3)In terms of the structural characteristics of the plant community in the park green space,the horizontal structure is dominated by the Centralized plant community,with Ficus microcarpa,Livistona chinensis,Ficus benjamina,Bougainvillea glabra,Ficus microcarpa’Golden Leaves’,Osmanthus fragrans var.semperflorens,Hibiscus rosa-sinensis,Cycas revoluta,Ixora chinensis,Carmona microphylla,Ophiopogon bodinieri,Zoysia matrella,Alocasia odora,Syngonium podophyllum,Axonopus compressus and Nephrolepis cordifolia as the main construction plants.The vertical structure is dominated by arbor shrub grass community,and the typical construction modes are palm tree shrub grass vegetation,banyan tree shrub grass vegetation,Myrtle tree shrub grass vegetation(4)In terms of the species diversity of the plant community in the park green space,the richness,diversity index and evenness index of each layer of the community are basically the same.The herb layer is the highest,and the average value of the three layers of trees,shrubs and grasses is close to that of the shrub layer.(5)In terms of the characteristic plant communities of the park green space,the communities with both plant diversity and landscape effects are mainly two types:recreational and ecological.(6)The plant communities in the green space of Xinxiu Park show the following characteristics: prominent banyan landscape,good landscape effect of micro terrain design,and good construction of undergrowth space;There are also some problems,such as less application of ferns,weak heterogeneity of plant landscape,lack of native plants,and relatively small species diversity of large communities.