| In this paper,15 urban parks in Zhengzhou are taken as the research object.Combined with the field investigation,SBE and SD methods are used to evaluate the colorful leaf plant landscape comprehensively,and the problems existing in the application of colorful leaf plants are summarized and suggestions are put forward.The main conclusions are as follows:(1)Field investigation shows that the applied species of color-leafed plants in Zhengzhou city parks belong to 64 families,139 generas and 202 species,there were 107 species(52.45%)of color-leafed trees,56 species(27.45%)of color-leafed shrubs,30 species(15.69%)of color-leafed herbs and 9species(4.41%)of color-leafed vines;In ornamental season,there were 45species(22.28%)of spring-leafed plants,104 species(51.49%)of autumn-leafed plants,and 53 species(26.24%)of normal-leafed plants;There were 102 species(50.50%)of yellow(orange)plants,72 species(35.64%)of red(purple)plants,18 species(8.91%)of polychromatic plants and 10 species(4.95%)ofornamental plants;96 species(47.52%)of native plants and 106 species(52.48%)of imported plants There were 109 species with good adaptability(54.0%),83 species with good adaptability(41.1%),9 species with good adaptability(4.5%)and 1 species with poor adaptability(0.5%).The application frequency was 15 species(7.43%)in grade I,44 species(21.78%)in grade II and 143 species(70.79%)in grade III.(2)15 city parks with color-leafed plant species ranked by richness were the Bayside Ridge park(94 species)> People’s Park(81 species)> Zijing Mountain park(78 species)> Zhengzhou Sculpture park(75 species)> Zhengzhou Forest(71 species)/Red and White flower park(71 species)> Yangtze River park(55 species)> Dongfeng Riverside park(51 species)> Zhengzhou Wetland park(50 species)>The May Day park(49 species)> Rose park/Shangdu Site park(46 species)> Lvyin park(45species)> Green city square(39species)> Green city park(36species).The common configuration methods of color-leafed plants are solitary planting and cluster planting,group(sheet)planting,column planting,pattern/foundation planting,stereoscopic greening,combination with waterscape / structure / stone setting or sculpture and other 9 categories.(3)Using SBE method and SD method to evaluate 45 photos of color-leafed plants,it was found that the evaluation values of professional group students,non-professional group students and social groups were basically the same,and the difference of group evaluation values between Zhengzhou and non-Zhengzhou was also similar,which indicates that the aesthetic values ofdifferent types of people were consistent;the first five items with higher evaluation indexes were the growth status of color-leafed plant > the overall landscape comfort>the overall landscape effect>the attraction of color-leafed plant landscape to people;The three items with lower average score of evaluation index are the expression of local/plant culture characteristics<the echo degree between plants < plant life the application of state.The parks with high comprehensive evaluation value of colorful leaf plant landscape include People’s park,Zijing Mountain park,the Bayside Ridge park and Zhengzhou Sculpture park,while the parks with low comprehensive evaluation value include green city park,green city square and Shangdu site park.(4)Analysis of four excellent cases in terms of structure and colour.In the structure,the total plant species is between 3-7 species,the color-leafed plant species is between 3-5 species,showing novelty or configuration and rich levels,among which,tree-irrigation species ratio is between 1:1 and 2:1,color-leafed plant ratio is between 1/2 and 4/5;in color,the overall color is between 5-7species,color layout is more comprehensive,contrast tone and medium green and purple are more valuable,similar tone and medium green and yellow are more valuable,complementary tone and medium purple and yellow are more valuable.(5)Finally,some suggestions are put forward to explore local tree species,embody local cultural characteristics,strengthen the introduction and popularization of color-leafed plants,attach importance to color design ofcolor-leafed plants and improve the level of conservation and management. |
