A Preliminary Study On The Tree Species Planning Of The Delta Plain Of Yangtze River And Hilly Town Areas In South Of Jiangsu(Area D)

Today,the environmental pollution is increasingly serious,people are requiring high standards for environmental quality and ecological functions are increasingly stressed,ecological urban construction has become the theme of our times.As main part of urban greening tree species,garden tree species are one of the important components of urban soft landscape,and also only the material basis of life,represents a characteristic of a region,so the application and planning of tree species not only relates to the effect of urban green landscape,but also related to the ecological functions of urban green landscape.The delta plain of Yangtze River and hilly town areas in south of Jiangsu(area D)belongs to north subtropical evergreen and deciduous broad-leaved mixed forest zone,the zonal plant species are more abundant.In recent years,the development of landscape greening in Jiangsu Province is rapid,landscaping tree species are becoming more and more abundant,but due to the lack of landscape tree species planning,existing urban tree species planning is not perfect,there are some probems in the ornamental plant planning in cities,such as the green form is monotonous,the lack of urban landscape features,application of tree species is not reasonable and so on.Aiming at these problems,this paper based on the ecological function of the delta plain of Yangtze River and hilly town areas in south of Jiangsu(area D)to do tree planning research.In the introduction and domestication theory,habitat factor analysis method,pollution ecology,plant communities,landscape ecology,biodiversity protection theory guidance,choose a suitable growth of tree species for the delta plain of Yangtze River and hilly town areas in south of Jiangsu(area D).This kind of tree species should be able to adapt to the natural environment conditions,effectively improve the urban ecological environment,maintain urban ecological balance,reflect the diversity of urban landscape and other aspects of the requirements.Mainly from the following aspects of the research and exposition.1.Study the status and development of tree species planning at home and abroad,and analyze the significance of tree species planning in the delta plain of Yangtze River and hilly town areas in south of Jiangsu(area D).2.The basic situation of the delta plain of Yangtze River and hilly town areas in south of Jiangsu(area D)from the geographical position,geological and geomorphological conditions,climatic conditions,soil conditions,hydrological conditions,natural vegetation resources were discussed,in order to better the regional planning of tree species.3.Based on the ecological habit of the tree species planning,the anti pollution adaptation ability of tree species planning and the biodiversity protection function of tree species planning to elaborate the delta plain of Yangtze River and hilly town areas in south of Jiangsu(area D),provides reference for different types of green tree species selection.4.Summed up city landscaping tree species application problems and put forward related solutions of the delta plain of Yangtze River and hilly town areas in south of Jiangsu(area D).5.Through the research analysis,make recommendations to the proportion of the proportion of gymnosperms and angiosperms,evergreen species and deciduous species,trees and shrubs and recommend species of urban fundamental key species,key species and general species.6.Summarized and discussed this article,based on in a more comprehensive understanding of the delta plain of Yangtze River and hilly town areas in south of Jiangsu(area D)tree species,master the existing tree species in the application of the delta plain of Yangtze River and hilly town areas in south of Jiangsu(area D),make a discussion,and put forward to the future direction of development.