| Ecological garden city is the urban construction concept put forward by our country,which aims to guide the urban planning and construction with the thought of ecology,and build a human settlement environment with ecological balance,beautiful environment and civilized society.As key in the construction of ecological garden city,the city landscape design has the optimization of the urban environment,expressing urban culture's important role,but in recent years,some urban gardens have become a mere formality and lack of ecological function to strive for newly,plant selection,of excessive dependence on the introduction of plant and the lack of cultural connotation,has affected the construction of ecological garden city.Native plants are recognized for their unique regional characteristics and good ecological functions,and the application of native plant gardens has gradually become a research hotspot.In addition,the ecological garden city attaches great importance to the ecological environment quality of the whole city,puts forward clear requirements for "local plant index" and "comprehensive species index" in its construction standard,which also indicates that local plants play a very important role in the construction of ecological garden city.Therefore,this paper takes the application of native plants in the construction of ecological garden city as the main research content,selects and selects the research site in yinchuan,and USES the methods of literature research,questionnaire survey,data analysis and AHP to systematically study the application of native plants in yinchuan.It provides a reference for the application of native plants in the construction of urban gardens and ecological gardens in northwest China.The main research results are as follows:(1)This study investigated the composition and application status of garden plants in 6 types of green Spaces(including park,square,residence,office area,road and street leisure green space)in central urban area of yinchuan city.150 samples and291 garden plants were investigated.Among them,72 kinds of local plants account for24.74% of the total number of urban garden plants,which is far away from the 70%index of local plants.According to local frequency 43 species research,application of high frequency(F 0.6 or later),four a day,9.30% of the total,the application of frequency(0.3 or less F < 0.6)there were 11 species,which account for 25.58%,low frequency applications(0.08 or less F < 0.3),there were 28 species,accounting for65.12%,thus come to the conclusion that the actual application in addition to individual native plants in landscape more frequent,quantity is more,the use of nativeplants are mostly low frequency,small number.In the construction of ecological garden city in yinchuan city,native plant species should be selected,wild native ornamental plant resources should be cultivated,and the application proportion of native plants in ecological garden city construction should be enhanced.(2)According to the analysis of the proportion of each life type plant in local plants,it is concluded that the local plants in yinchuan city are the most arboreal plants,accounting for 40.27%,shrubs and herbaceous plants,accounting for 29.17%and 27.78%,respectively,and at least lianas,accounting for only 2.78%.Through the comparison and analysis of the current application status of local plants and native plants,the actual application of arbor plants in various green Spaces is more than that of native plants,with an average of 57.13%.The application of herbage flowers is less than that of native plants,with an average of 32.14%,which is only half of that of native plants.The results showed that the morphological composition and application of native plants in yinchuan were unbalanced.In the practical application of garden,we should attach importance to increasing the application of native plants in herbaceous flowers,so as to quicken the balance of native plants' life type composition and application form.(3)Through the questionnaire survey on the local plant awareness and garden satisfaction of 207 citizens,the results show that 42.51% of respondents have a vague concept of local plants,and 74.88% prefer the landscape composed of introduced plants.34.30% of respondents are not satisfied with the landscape greening in yinchuan city,among which 36.62% and 35.21% think that the current urban greening situation has problems such as low greening amount and less distinct regional characteristics.The results showed that yinchuan residents generally have a low awareness of native plants.Poor acceptance of native plant landscape;Not satisfied with the status quo of urban gardens.Should strengthen the education of native plants,improve the public's acceptance of native plants in landscape,and need to increase the application of native plants in urban gardens,improve the amount of landscaping and landscape regional characteristics,improve the quality of urban gardens.(4)In this paper,through the establishment of local plant landscape application evaluation system of yinchuan,yinchuan 95 species of native plants(including 72 species of native plants and have been used 23 kinds of not using wild native plant)has carried on the quantitative evaluation,and according to the quantitative score has carried on the classification to participate in the evaluation of native plants,including? level represents has excellent landscape application value of plants,is recommended to apply such plants for urban landscape;Grade ? said good landscape application value of the plant,because the culture connotation,ecological function grade is slightly inferior to the ?,is recommended to apply such plants in city landscaping;? level have some applied value of garden plants,not due to habitat widely degrees,application form,the less will not recommend this kind ofplant is widely used in city landscape,according to the actual situation in a few application in city gardening;Grade ? said do not have good landscape application value of the plant,due to the immature development research,ornamental period is shorter and blind application of this kind of plant is not recommended in the urban landscape.The results of the evaluation is: by evaluation of the native plants,?level,a total of 19 species accounted for 20.00%,including pagoda tree and meadow plants;?level up to 42 species,accounted for 40.48%,including roses,abele and euonymus plants;?level 22 species,accounted for 23.16%,including twotooth achyranthes root,sheep spear and hollyhocks plants;? level at least,for 12,12.63%,including tooth yarrow,etc.This study provides scientific basis for selection of native plants for the construction of ecological garden city in yinchuan. |
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