| Taking the parks and green spaces of Hefei City as the research object,selecting appropriate sample plots for sampling survey and analyzing the urban forest structure is not only of great significance for promoting the further optimization of the plant configuration of Hefei City’s parks,but also for Hefei City and similar surrounding areas.Provide basic information and reference basis for the planning and construction of urban forest parks.With reference to the research method of the Farui School,a total of148 sample plots were selected from 13 parks in Hefei to investigate the status of urban park plant communities.The results are as follows:(1)A total of 137 species of plants belong to 61 families and 110 genera.The top five dominant families are Rosaceae,Gramineae,Liliaceae,Leguminosae,Pinaceae,and the top five dominant genera are Acer,Heather,Pinus,Rhododendron,and Ulmus;(2)ratio of trees,shrubs and grasses It is 3.64:1.59:1.A total of 80 species of trees,35 species of shrubs,22 species of herbs,the ratio of evergreen and deciduous species is about 1:1.59,and the ratio of coniferous and broad-leaved species is 1:8.46;(3)There are 73 species of native plants,accounting for the total 53.28%,native plants in trees accounted for 60% of the total;native plants in shrubs accounted for 45.71%;native plants in herbs accounted for 40.91%;(4)The top ten dominant species are Osmanthus fragrans and Fragrant.Camphor,coral tree,privet,Pittosporum,Metasequoia,palm,purple leaf plum,cedar,cherry blossom.Cinnamomum camphora and sweet-scented osmanthus,shrubs,Pittosporum and Nantian bamboo,and herbaceous grass and bermudagrass have the highest application frequency;(5)Tree layer richness,uniformity index and Shannon-wienner diversity index relative to shrub grass The layer is relatively high and relatively stable.The Simpson index of most parks presents the rule of tree layer>shrub layer>herb layer;(6)Among the community types,the evergreen and deciduous broad-leaved mixed forest accounts for 60.81% of the total,the highest proportion;Followed by coniferous and broad-leaved mixed forest,evergreen broad-leaved forest,deciduous broad-leaved forest,bamboo forest accounted for the smallest proportion of less than 1%;(7)about59% of the tree species DBH is in the range of 10 ～ 30 cm,crown width in The largest proportion is in the range of 4～6m,and the height of arbor trees is mainly concentrated in the range of 3～10m;(8)The average DBH of evergreen plants is larger than that of deciduous plants and crowns of deciduous plants in the plant communities of park green spaces in Hefei.The width is larger than evergreen plants,and the average height of deciduous trees and evergreen shrubs is relatively higher;(9)Trees are in good health,with a health level of 1 accounting for 68.03% of the whole. |
