Investigation And Research On The Chracteristic Trees And Shrubs Of The Urban Park Green Space In Nanjing

Urban parks green space is an important part of city green ecosystem of urban constructive area, green system and municipal public facilities.For the ecological and landscape benefit, the ground covers will be more and more attached important to application in urban construction. Urban park, as an important part of city ecosystem, plays an important role in reliefing current city environment question and protecting the urban ecology. Taking the Nanjing urban park green space as the objects of investigation and research, this paper makes a great deal of field investigation, data collection, construction of the green space of residential building groups and gives an objective evaluation on the application of the characteristic trees and shrubs of the urban park green space in Nanjing. This paper divide the grden green space into four types,including road-greenbelts, waterfront green space, green space around the buildings and ornamental green space. First of all, it applies section character theory and style character theory, analyzes the configuration of garden plants from ornamental elements, color composition and seasonal changes; it applies vegetation ecology methods such as community species composition, structue and other community quantitative features etc, analyzes plant community of the arboreal-layer and the bush-layer respectively.On the basic study of community characteristic,The evaluation system was established through AHP to evaluates 30 typical communities landscape.By the preceding analysis, we know present state and characteristics of the green space of the urban parks in Nanjing, and give a optimizational suggestion.The main conclusions of this paper were as follows:1,According to the analysis of the configuration of plants planted in the 13 pieces of greenbelts in Nanjing gardens, it was concluded that the traits of the successful garden green space is the impressive visual effect and the sense of macrocosm,which have a tight relationship with location,background environment,choice and combination of the plant material and cultural trait.2,It shows that the application of the characteristic trees and shrubs in the arbor-layer of the parks in Nanjing focus on several species relatively,among which, Ligustrum lucidum, Magnolia grandiflora and Cinnamomum camphora have the highest usage frequency.The same situation happened in the bush-layer too.According to comprehensive data,it was concluted that the species used in the parks is monotone relatively and most of them are the popular species of road-greenbelt,plaza and residential region in Nanjing.So the characteristics are not obvious among the green space with different functions, lacking diversity.However,the regional feature of the plant landscape is obvious relatively.3,Using AHP with fuzzy synthesis evaluation to assess Nanjing urban parks green space. From four aspects of ecology, landscape, social service and cultural connotation, this paper formulates comprehensive index system of Nanjing urban parks green space quality and sets up the model of AHP with fuzzy synthesis evaluation on urban parks green space. Then it gives comprehensive evaluation indexes of 30 Nanjing parks green space.4,The suggestions of improving Nanjing parks green space. According to the results of configuration of garden plants analysis, plant community analysis and quality comprehensive evaluation, this paper gives several advices of Nanjing urban waterfront green space.