Application And Screening Of Salt-tolerant Landscaping Plant Resources In The Coastal Areas Of South China

Soil salinization has become the issues of the major resources and environmental threating to the survival of human.With the urbanization process accelerated,salty soil areas in the coastal areas of south china are growing up.Soil salinization,lower vegetation coverage and poor quality of garden forestation have become the bottleneck of the construction of landscaping forestation and ecological environment in these areasLandscaping plant resources are very rich in the coastal areas of South China,but the salt Tolerances of most plants are also unclear.Many fine salt-tolerant plants do not yet obtain the use.It is necessary to screen for salt-tolerant landscaping plant as soon as possible.The direct observations of salt-tolerant plants in salty soil are the most economic and effective measures to screen for salt-tolerant landscaping plant with prospects for the development and utilization in the coastal areas of South China. It is important to develop the selection and Configuration research of salt-tolerant landscaping plant resources for improving the landscape quality,reducing the construction cost and the maintenance charge in the coastal areas of South China, protecting ecological environment and maintaining biodiversity and so on.The author records in detail the types of plant,the growth condition,the degree of salt injury,the habitat characteristic and the surrounding types of plant by field-investigating the salt-tolerant plants in the coastal areas of South China.Salt contents were measured for the acquainted soil and water sample,the salt-tolerant scope of plant was evaluated in the area of saline-alkali soil,salt-tolerant landscaping plant resources were screened and explored in the coastal areas of South China and landscaping plant selection and configuration to use the Gulf Boulevard in Xiamen. These studies aimed at providing the scientific basis for choosing and configuring landscaping plant and offering reference for salty soil greening in the coastal areas of South China.The main studies carried out in this dissertation are summarized as follows:1.Investigation and selection of salt-tolerant landscaping plant resources in the coastal areas of South China. This investigation lasted 3 years,the survey locations,including the coastline of Hainan Island,Shenzhen Guangdong,Zhanjiang Guangdong,Guangxi coastline (including Weizhou Island),Xiamen Fujian,Quanzhou Fujian and so on.In combining the field-investigating,laboratory testing and literature inspecting methods, the salt-tolerant scope of plant was evaluated in the area of saline-alkali soil,the salt-tolerant landscaping plant were screened and recorded in detail the types of plant, the growth condition,the degree of salt injury,the habitat characteristic and the surrounding types of plant.Soil salinity was determined by electrical conductivity. Based on the method of Zhao and combining the plant growth and development condition,the extent of salt-tolerant plants was divided into four levels.These results may provide a basis for further applied the salt-tolerant landscaping plant in the coastal areas of South China.2.The configuration research of salt-tolerant landscaping plant in the coastal areas of South China.The author discussed Factors affecting selection and configuration of landscaping plant species in the south China,analyzed configuration characteristics,offered the existing problems,the constructing concepts and the appropriate configuration mode, in order to provide a basic thinking for the applied research of salt-tolerant landscaping plant in the coastal area of south China s.3.To the Gulf Boulevard in Xiamen as an example,the applied research of selection and configuration of landscaping plant species in the coastal areas of South China.The author investigated the basic profiles of the Gulf Boulevard in Xiamen, analyzed and discussed the application present situation of landscaping Plants,offered the selecting principles,the appropriate plant species and the vision for the specific configuration for reference.The main results obtained in this dissertation are summarized as follows:1.This paper selected a total of 55 Familia 91 species,including 45 kinds of trees,32 kinds of shrubs,14 kinds of herbs.The results showed that,in the survey of 91 species,80 kinds of plants possesses a high degree of salt tolerance,11 kinds of plants possesses a moderate degree of salt tolerance.The degree of salt tolerance in the majority of plants is above 4 mg / g.At the same time,in the survey of 91 species, only 60 species have(?)een widely used in the landscape,accounting for 65.9 percent, while 31 species,with great promotional value,have not yet not being used.2.The new conception was proposed that the mangrove forest was taken as dominant species in the inter-tidal waters,palm plants in order to represent the coconut palm was supposed in the coast sand of the land,the salt ornamental plant construction was taken the tropics broad-leaf plant as dominant species in the slopes of the rock low earthen mound land and the cliff steep slope to bear in coastal areas of South China. The idea of applicaticn of was put forward about the coastal landscape salt-tolerant plants of 6 categories(palm plants,mangrove,semi-mangrove,coastal plants and widespread group of plants,sand plants and coastal shelterbelts).Under the influence of the sea and beach landscape,made 3 configuration modes of plant communities (including the cliff landscape plant community,the sand shore landscape plant community,the marshy bank landscape p(?)ant rise at near sea ).At the same time,the section plants of the different landscape were selected and its community structure in the horizontal and vertical was discussed,the suitable planter pattern demonstration was cited.3.The investigation showed that there are some problems(for example,failure to give full consideration to site conditions,failure to play effective functions of plants creating and a single tree shelterbelt,etc.) about configuration landscaping plant species in the Gulf Boulevard in Xiamen and six basic principles for landscaping plant selection were Fur forward in the Gulf Boulevard in Xiamen,including the principles of ecology,economic principles,the principle of regional,the principles of the right place and suitable plants,science and art combined principles and people-oriented principles.Landscaping plants suitable for the Gulf Boulevard in Xiamen were selected,of which 9 species of mangrove,6 species of semi-mangrove, 28 species of tree,21 species of shrubs and 18 species of herbs.Also,the concrete configuration ideas of landscaping plants was proposed in the 2 kind of different landscape belt(stone shore masonry and building,natural transition form) in the Gulf Boulevard in Xiamen.