The Phenological Change And Planning Of Color-Leafed Trees In Nanjing

Color-leafed trees make up the city with its colorful leaves,stable and lasting viewing when in the season which has less flowers to see,especially the fall-color trees.As the most widely used colorful trees,fall-color trees play an irreplaceable role in garden landscaping.When autumn comes,their leaves change from green to yellow,red or brown,showing the beauty of dynamic seasonal landscape.In recent years,Color-leafed trees attract people's attention more and more.But the available literature is more focused on their survey of urban green space or quantitative research of their leaves,lacking the research on aspects of color changing sequence,color cycle,and complete planning guidance.In order to better play the role of Color-leafed species in Nanj:ing City Landscaping,forming the corresponding species planning is needed to further explore its potential,identify the characteristics of its application and finish the basis work of looking for the application of the rule of color-leafed plants.In this study,choose Beijige Plaza,the Liangzhou of Xuanwu Lake Park and Stone Ruins Park as the survey sample,and 20 plots in the four survey samples to investigate and observe.The main research and analytical work were launched from the following three aspects:(1)Record species types,number of trees,height,diameter and crown coverage within each sample as the original data,mathematically calculated their summed dominance ratio in each plots,and focus on the application of colcor-leafed species.(2)Take color-leafed species which grow well as the main object of study,observe and record their color's changing time node,discoloration process and so on,master their color's changing in one year period of typical Color-leafed trees in Nanjing Greenland to provide reference for the choice and design of Color-leafed trees.(3)Recommend good color-leafed trees for Nanjing,format the "The list of suitable color-leafed trees in Nanjing Greenland "," The list of native color-leafed trees in Nanjing " and other basic information,and provide a more scientific basis for the application of Nanjing color-leafed species.