| Urban park is an important part of urban green space system,which plays an important role in protecting urban biodiversity and improving residents’ quality of life.The diversity of garden plants is the premise to ensure the sustainable development of urban parks.In this paper,12 representative urban parks in Hengyang are selected as the research objects,and the species diversity of garden plants and their correlation with park factors are studied by means of census and typical sampling.and Strive to guide and learn from the construction of urban ecological civilization in Hengyang City and the creation of "forest city".The following results were obtained:(1)Record Hengyang City Park garden plants about 93 sections 205 belong to275 species,in the national urban park in the middle level.Among them,there are 187 species of woody plants,66 species of herbaceous plants(including one or two annual herbs,root and bulbous plants),6 species of ferns and 16 species of bamboo plants.There are 26 genera and 16 genera,followed by Rosaceae,12 genera and 17 species,and 5 genera and 11 species.There are 143 genera and 116 genera in 69 families and132 genera in 108 families in 53 families.There are 120 kinds of evergreen trees,83 kinds of deciduous trees,and evergreen trees: deciduous leaves The tree is 1.5:1.There are 24 fruit-watching plants,108 leaf-watching plants,92 flower-watching plants and 108 flower-watching plants.(2)There was a significant positive correlation between plant diversity and the number of green patches in the park,and there was no significant correlation with the building area of the park.The most abundant species is the comprehensive park,the least is the street green space.(3)The floristic composition of Hengyang Park is complex and diverse,and 93 families are divided into 12 geographical distribution areas with obvious pan-tropical and northern temperate properties.(4)The natural degree of plant community in Hengyang parks is as follows:Tiger Mountain Park > Dongzhou Island Park > Nanhu Park > Pinghu Park > West Lake Park > Southern suburb Park > Ecological Park > Yueping Park,Yanfeng Park >Lianxi Park > Lujia Xinwu Park > Chuanshan Park.(5)There were 93 structures,10 structures,38 structures and 3 structures.Statistics Hengyang City Park garden plant frequency,important value of the top 10 trees,shrubs,herbs.the overall characteristics of garden plant community index in hengyang park are as follows: Margalef richness index is tree > shrub > herb,Pielou evenness index herb > shrub,tree,Shannon-Wiener index shrub > herb,tree layer,Simpson index shrub,herb and tree layer.(6)There were 0 species of garden plants,7 species of plant diversity,3 species of plant diversity and 2 species of plant diversity.Grade II is the majority,indicating that the garden plant diversity of Hengyang City Park is generally in the upper and middle level.(7)In Hengyang city park,the proportion of plants used in species composition,life type and ornamental characteristics is not coordinated;the spatial distribution of plants is uneven,the three-dimensional greening and water greening need to be strengthened;the late maintenance and management of plants is improper;the regional characteristics are lacking;the public awareness of plant diversity protection is weak;lack of function of science education in parks,and so on.(8)The counter measures of plant diversity protection and development in urban parks of Hengyang city are expounded from four aspects: plant diversity protection,landscape diversity protection,community diversity protection and park green space protection. |
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