The Investigation And Study On Self Growth Plants In City Proper

With the speeding up of urbanization, the deterioration of urban environment worsening, natural habitat reduction in the city, and urban biodiversity is facing a great threat, people have a strong desire to build urban natural ecological environment. Under the artificial construction management,thousands of the city faces,the botanical garden plant species, the same city park maintenance management difficult problems such as significant,but some plants in the city can adapt to the urban environment,the growth of natural reproduction. Self growth plant habitat, species diversity, and many native tree species for the city,convenient management,a beautiful landscape,with regional characteristics,and it conforms to the natural succession law of plant community,had a huge effect on urban ecological environment construction. The investigation and study on self growth plant in the city is of great significance.This article is based on the inside of Hangzhou city proper domain of 160 square kilometers within the scope of the city self growth plant species pictures on investigation and study,a total of records since 71 families, 122 genera and 130 species of plant species. Among them,Trees 43,shrubs 14,herb 61,vine 7,ferns 5 in species. Of the plant species in the frequency of frequency statistics analysis, it is concluded that the highest occurrence of Broussonetia papyrifera, have a strong sense of invasive; Ficus carica lowest frequency. According to the characteristics of different habitats of the city gives birth to classify the plant species from the plant species richness, urban land > city parks >neighborhood >city street >downtown business district. Since the number of plant species is inversely proportional to the degree of human disturbance, is proportional to the habitat area, is proportional to the original plant species richness and habitat transition area since the number of plant species > single habitat since the number of plant species. On the ecological and landscape function studies of plant, put forward the construction method of self growth plant communities, and illustrates the embellish Machilus nanmu + Paulownia tomentosa + Pseudolarix kaempferi- Osmanthus fragrans +Cercis chinensis- Jasminum mesnyi + Perilla frutescens + Solanum nigrum + Setaria viridis;Pinus massoniana+Ailanthus altissima+ Koelreuteria bipinnata ‘Integrifoliola’+ Broussonetia papyrifera-Symplocos stellaris+ Nerium oleander- Ranunculus japonicus + Pueraria montana + Indigofera bungeana + Trachelospermum jasminoides plant community configuration mode, etc.