Study On Landscape Construction Strategy Of Urban Green Land Based On Communities Analysis And Landscape Evaluation

With the continuous advancement of urbanization throughout the country and the continuous improvement of the level of urbanization,the ecological functions of the urban environment have been destroyed,more and more urban residents are increasingly pursuing a plant landscape environment that can both improve the appearance of the city and the quality of the city.At present,research on the construction of urban green space plant landscape has been valued because of its effect of improving urban ecological greening and accelerating sustainable urban development.Therefore,in order to comprehensively understand and master the basic application situations and current situations of garden plants in Turfan,the four types of urban green space including park green space,green space affiliated to units,residential greenbelt and road greenbelt in Gaochang District,Turpan City are selected as research objects,we use field surveys to investigate the plant species,the life forms,the ornamental characteristics,the plant configuration and other aspect in the study are,use the analytic hierarchy process(AHP)to evaluate and analyze the plant landscape and construction status in Turpan’s urban green space,propose the optimization strategies,which provide reference materials for the green space construction of Turpan’s ecological garden city in the future and provide theoretical basis to help local garden construction departments to plan and design urban green space and landscaping in the future.The main researched results are as follows:(1)There are 109 plants in four types of green spaces in Gaochang District,Turpan City,belonging to 37 families,61 genera,67 species of trees,45 species of shrubs,and 12 species of herbs.Among them,angiosperms include 33 families,54 genera and 100 species,and gymnosperms include 4 families,7 genera and 9 species.The four types of green land in Gaochang District are mainly angiosperms.There are two types of monocotyledonous plants in angiosperms,belonging to 2 families and 2 genera,and 98 dicotyledons,belonging to 32 families and 53 genera.(2)The four green spaces in Gaochang District,Turfan City follow the combination of"arbor-shrub-herb" in plant configuration,among this four green spaces,the plant configuration of park green space is abundant and varied,which adopts scattered planting,cluster planting,group planting and other planting methods of garden plants to enhance the richness of configuration forms and express the individual beauty and overall beauty of garden plants in landscaping.(3)In terms of plant ornamental characteristics,there are 25 species of fruit plants,37 types of flowering plants,14 types of evergreen leaf plants,and 33 types of seasonal-phase leaf-color plants.In terms of plant sources,native plants accounts for 20.18%,domestically introduced species accounts for 61.47%,and foreign introduced species accounts for 18.35%,among them,foliage plants and domestically introduced species are the main plants in Gaochang District,Turpan City.(4)In terms of the types of urban green space,there are 101 types of plants in the park green space,accounting for 92.66%of the total number of plants;53 types of plants in the residential greenbelt,accounting for 48.62%;36 types of plants in the green space affiliated to units,accounting for 33.03%;there are 26 plant species in the road greenbelt,accounting for 23.85%.In terms of the configuration of trees and shrubs,the proportion of trees and shrubs in the green space of the park is 1:0.68,with the most abundant landscape levels,In terms of the allocation of evergreen and deciduous trees,the ratio of evergreen and deciduous tree species in the residential greenbelt is 0.06,which is within the range of commonly used proportions of northern tree species.(5)According to China’s CJJ/T85-2017 "City Green Space Classification Standards",we divided the green land in Turpan Gaochang District City into different types,set up a total of 100 plots using the sampling method,and measured the plots based on indicators such as plant species,diversity and ornamental characteristics.We build a model that takes 3 criteria layers based on the ecological,landscape,and social levels,9 qualitative indicators,and 6 quantitative indicators as factors by applying Analytic Hierarchy Process(AHP)to carry out comprehensive evaluation analysis and classification of plant landscape.The results show that of the 100 plots,there are 8 grade Ⅰ landscapes,of which the types of plots are park green spaces,with the highest landscape score of 83.37 points,and 52 grade Ⅱ landscapes,the types of plots include park green spaces and road greenbelt,there are 23 Grade Ⅲ landscapes in green land,of which there are more green spaces in residential greenbelt,and 17 Grade Ⅳ landscapes.By investigating and evaluating the plant landscape community in Turpan Gaochang District City urban green space,the meantime combining the current status of plant landscape construction with different levels of comprehensive quality and benefits in Turpan Gaochang District City we propose an optimization strategy for these issues,hoping to provide guidance for the construction and management of plant landscapes in urban green space in Turpan in the future.