Investigation And Analysis Of Landscape Plants In Hechi Jinchengjiang District Of Guangxi

Landscape plants are the foundation and theme of garden greening,they play a key role in the construction of garden green space,but the study of landscape plants in Jinchengjiang district is still blank.In this paper,36 typical green spaces in Jinchengjiang district are investigated by means of field sampling and random sampling,the species of garden plants,life type,Ecological type and ornamental characteristics are sorted out,and the plant resources and application configuration status of landscape Plants are explored;88 representative areas are carried out to investigate every tree and analyze the plant species diversity in the plant community of Jinchengjiang district.Based on the investigation and statistical results,this paper summarizes the application configuration of landscape plants in Jinchengjiang district,analyzes the existing problems,and puts forward some preliminary Suggestions.The results are as follows:1.There are 245 landscape plants in Jinchengjiang district,belonging to 86 families 185 genera.Among them,228 species of angiosperms,belonging to 75 families 170 genera(174 species of dicotyledonous plants,belonging to 61 families 132 genera;54 species of mono cotyledonous plants,belonging to 14 families 38 genera);3 species of ferns,belonging to 3 families 3 genera;14 species of gymnosperms,belonging to 8 families 12 genera.In plant life style,there are 113 trees,83 shrubs and 46 herbs in landscape plants,herbs and lianas are deficient in application;In the phase of the season,there are 153 evergreen trees and 46 deciduous trees.Evergreen trees:Deciduous trees = 3.33:1,the seasonal variation is not obvious;In the source of plants,There are 58 native plants and 187 alien plants,the proportion of native plants and alien plants are 1:3.22,The alien plants are advantage;In terms of ornamental characteristics,the ornamental foliage plants are the dominant ones,and the application of fruit viewing plants is less,only accounting for 7.76%,There are 68 landscape plants with two or more types of ornamental features(including 2 categories),which account for 27.76%of the total number of landscape plants,Some landscape plants can either view the leaves or look at the shape,such as sabal,podocarpus and so on.Most of the landscape plants are tropical Plants.2.In the diversity of landscape plants,plant community Patrick index S value ranged from 1 to 19,The highest S value is in the residential green space,the S value is as high as 19,the S value of road green space is the lowest,only 1.There are 23 communities(Patrick index S?10),accounting for 26.14%of the total number of the communities.The maximum and minimum values of the Shannon-Wiener index(H')and the Sinpson index(D)are both in the unit green space,The maximum value of the Shannon-Wiener index(H')is 3.22 in the arbor layer,the minimum value of the Shannon-Wiener index(H')is 0.3 in the herb layer.The maximum value of the Sinpson index(D)value is 0.95 in the arbor layer.the minimum value of the Sinpson index(D)is 0.14 in the herb layer.In the different types of green space,except the road green space,the Sinpson index(D)change trend is broadly consistent with the Shannon-Wiener index(H'),show as:arbor layer>shrub layer>herb layer,the maximum value of Sinpson index(D)and shannon-wiener index(H')in road green space are in the shrub layer.The Pielou evenness index's Change(Jsw and Jsi)is different in the road green space.In other types of green space,the change trend of Pielou evenness index Jsi is the same as the Pielou evenness index Jsw.The change trend is:arbor layer>shrub layer>herb layer.In the road green space,the maximum values of Pielou evenness index(Jsw and Jsi)are both in the herb layer,and the least of the Pielou evenness index(Jsw)is the shrub layer and the l east of the Pielou evenness index(Jsi)is the arbor layer.On the whole,The plant diversity in Jinchengjiang District of Hechi is relatively low,the repetition rate of green space is high,need to enrich plant diversity,and scientific configuration of garden plants,create a variety of plant landscapes.