The Investigation And Research On Plant Community Of Heritage Parks In Nanjing

Nanjing is a famous historical and cultural city built more than 2500 years,it is called"six dynasties","ten dynasties metropolis".Nanjing has long been the political and cultural center of south China and it has a profound cultural background and rich historical heritage.The research of heritage parks mainly concentrated in plant landscape and the overall planning,but making the system analysis and comprehensive evaluation for the plant community of heritage parks by sample plot method is still rare.This article will research within the scope of heritage parks in Nanjing.I selected 40 sample plots from 6 types of greenbelt of the 8 heritage parks in Nanjing and did extensive fieldwork by means of consulting documents and data.Use the theory of phytocoenology,plant taxonomy and urban landscape ecology to investigate the species composition,community structure and configuration mode of the plant community at heritage parks.At the same time,using the analytic hierarchy process(AHP)which is a combination of qualitative analysis and quantitative analysis to make a comprehensive evaluation analysis for 40 plant communities,and finally get a result of the status and characteristics of plant communities at heritage parks in Nanjing.Identify shortcomings and propose appropriate optimization recommendations,provide a reference and theoretical basis for the construction of plant communities at heritage parks.The research content and main conclusions can be listed as follows:(1)According to the spot investigation and detailed analysis of community characteristi cs in terms of 40 green spaces,the 8 heritage parks have a total of 69 families,128 genera a nd 185 species of plants.The proportion of native plants is 34.6%,and the proportion of nat ive trees is higher than that of native shrubs.As the similarity of plants applied in those par ks is 15%-35%,it is obvious that the landscape heterogeneity among each park is better.(2)Through the field investigation and the analysis of typical cases on the six types of green spaces including of entrance green space,road green space,heritage green space,buil ding green space,waterfront green space and main green space,the characteristics of applic ation for different types of plant materials and the plant planting patterns can be obtained.(3)In the light of the evaluation of the comprehensive quality for heritage park green s pace,20 green spaces result in comprehensive quality level Ⅰ,17 green spaces level Ⅱ,an d only 3 green space turn out to be Ⅲ level.It is obvious that the comprehensive quality of green space in heritage parks is in good condition.