Study On The Quality Of Plant Community And Use Evaluation Of Urban Greenway

On February 19,2019,the Social Development Research Center of the Chinese Academy of Social Sciences jointly released the "Ecological City Green Paper: China's Ecological City Construction and Development Report(2019)" to further promote the construction of an ecological city.As an important link in the construction of an ecological city,the urban center greenway plays an important role in improving the urban environmental quality and maintaining ecological development.Based on the consideration of the ecological function and use function of greenway,this paper takes the greenway in the center of Huanyushan Lake in Maanshan as the research object,selects a representative sample of greenway community,and investigates its community structure,species composition and community diversity The quality of the community has been studied;the use of greenways has been investigated and recorded to establish a discussion on the relevance of functional impact.Subsequently,225 questionnaires on the use evaluation of greenways were distributed on this target plot,combined with data analysis results to analyze the impact of greenway function correlation and feedback on use feelings,and combined with the results of the greenway plant community survey on the green of Huanyushan Lake The planning and construction of Dao put forward the next optimization suggestions.The conclusions of the research on the diversity of the greenway community around the center of the Yushan Lake and its use evaluation are as follows:(1)In the sample survey of the greenway plant community in the center of Huanyushan Lake,the total number of plant species is 94,belonging to 52 families and 83 genera.The ratio of tree: shrub: herb species is 1: 0.69: 0.40,and the proportion of tree species is relatively large.Large,relatively rich in wood species,relatively few types of herbs.Tree species with higher frequency of application include Osmanthus,Camphor,Palm,Acer palmatum,Camellia,Two-ball Platanus,Rhododendron fortunei,Haitong,etc.(2)The appearance of the greenway plant community structure is dominated by evergreen broad-leaved tree species and deciduous broad-leaved tree species.The species ratio is basically maintained at about 1: 1.There are relatively clear seasonal changes,and there are fewer types of conifers.The distribution of diameter steps of the arbor and shrub in the greenway is mainly concentrated in the interval of 10cm-20 cm,and the distribution of arbores and shrubs between 3m and 10 m in the high-order distribution accounts for 40%on average.The community still has strong growth vitality,and the large-diameter steps in the greenway And the distribution of higher-order plants is also relatively healthy,forming a well-defined urban flora.(3)The Shannon-Wiener index of the greenway plant community in the Yushan Lake Park section is 4.6907,the Margalef richness index is 6.94,which is the highest among the target plots,the Shannon-Wiener index of other affiliated green areas is 2.6143,and the Margalef richness index is 3.56,relatively low.(4)Among the 221 valid questionnaires recovered from the post-use evaluation survey of the central greenway,the residents in this area accounted for up to 41.63%,and the visitors over 55 accounted for 52.04%.Nearly half of the tourists chose target plots for daily exercise For physical places,64.25% of the respondents indicated that they generally choose to walk to the target plot.(5)The overall comprehensive score after weighted evaluation of the central green road of Huanyushan Lake is 3.8389,which is close to satisfaction(4 points).Based on the target layer,the comprehensive evaluation score of ecological function(3.9656)is the highest among the first-level criteria layers.,The use function comprehensive evaluation score(3.7033)is the lowest;in the second-level indicator layer,the vegetation species species diversity comprehensive score(0.6760)is the highest and the infrastructure comprehensive score(0.0518)is the lowest.(6)According to the distribution of greenway community diversity quality and greenway usage,in urban greenways,the higher the community diversity index,the higher the community quality,the use frequency and use evaluation in this area are also relatively high.The growth of the plant community directly affects the user's experience.