Study On Plant Scenic Beauty Estimation In Central Park Of Chongqing

Plant landscape is the most important part of the urban park landscape.To evaluate the beauty of the landscape,to understand the landscape elements of the landscape,to establish a landscape assessment model,and to propose an optimization plan for plant allocation,it not only improves and complements the landscape aesthetic evaluation theory,but also To build a reasonable city park plant landscape provides a scientific basis.In this study,the plant landscape of Chongqing Central Park was taken as the research object to investigate the current status of plant landscapes in the park.The plant species,life style,community structure,spatial form,and seasonal changes of the community were investigated and analyzed,and the beauty of the typical plant landscape was evaluated.On this basis,the evaluation explores the landscape elements and their weights that affect the beauty of the park’s plant landscape,and then proposes a landscape optimization plan.A total of 65 plant communities were investigated in Chongqing Central Park.The results are as follows:（1）There are 136 common plants in the Central Park,including 67trees,38 shrubs,27 herbaceous plants,3 bamboo plants,and 1 vine plant.（2）There are abundant types of plant communities in Central Park,including 16 evergreen and deciduous broad-leaved mixed forests,10 evergreen broad-leaved forests,3 deciduous broad-leaved forests,5 evergreen coniferous forests,and deciduous coniferous forests.2There were 13 coniferous and broad-leaved mixed forests,5 palm forests,2 bamboo forests,5 sparse forest meadows and 4 grasslands.（3）The horizontal structure of plant communities was dominated by mixed type,with 49 mixed communities and 16 pure forest communities.The vertical structure of the plant community was a multi-layered community pattern,including 33“tree-shrub-herb”types,7“tree-shrub”types,23“tree-herb”types,and 2“shrub-herb”types.（4）Various spatial forms of plant communities are abundant in Chongqing Central Park.There were 38 semi-open-space plant communities,9 closed-space plant communities,8 open-space plant communities,5 cover-type plant communities,and 5 vertical-space plant communities.（5）The seasonal changes of the plant landscape in Chongqing Central Park are reflected by the ornamental characteristics and time series of the plants.The survey shows that there are 63 species of parks,99species of view plants,15 species of view plants,and observations.There are 20 other species of ornamental plants;32 species of spring flowers,25 species of summer flowers,12 species of autumn flowers,and 4 species of winter flowers.Decompose the landscape elements and establish a landscape evaluation model.Based on the correlation analysis of the factors and beauty evaluation results,we found that the landscape factors that mainly affect the evaluation of landscape beauty are:color richness,plant species,life form,space form,trunk shape and growth potential,and thus get the plant landscape evaluation model:SBE=49.367+9.178x₂+17.014x₄+16.739x₆-6.498x₇-34.176x₉-25.356x₁₄.The main landscape elements affecting the beauty of plant landscapes were separately studied with the effects of landscape beauty.The results were as follows:（1）From the perspective of“color richness”,the beauty values decreased first with the increase of color richness.The trend then increases with the increase in color richness.（2）From the point of view of“plant types”,the value of beauty values increases with the increase of plant species,and then decreases.Finally,it increases with the increase of plant species.（3）From the point of view of“lifestyle composition”,with the change in life style composition from“tree-shrub-herb”type to“tree-shrub”type,the value of beauty is reduced;when the life type composition is changed to“tree-herb”type,the value of beauty increases again.（4）From the“space form”point of view,the beauty value increases when the space shape is changed from open to semi-open;then,when it is changed to covered space type and enclosed space type,the beauty value decreases;finally,it turns to vertical space.At the time of appearance,the value of beauty increases again.（5）From the“trunk shape”,the beauty value decreases as the trunk is bent straight.（6）From the point of view of“growth potential”,the value of beautifulness decreases as the growth potential weakens.Based on the research and summary analysis of the above-mentioned plant groups,the evaluation of the landscape beauty of the plant landscape,the establishment of the model,and the analysis of the main impacts of the landscape elements,according to the different spatial patterns of the previous classification,the plant landscape selection,configuration,and An optimization plan was put forward on the plane composition,which was used as a reference for the summarization and optimization of plant landscapes in Chongqing Central Park and the creation and optimization of plant landscapes in other parks in Chongqing.