Construction And Application Of Suitable Plant Resources System In Park City Based On Ecological Value

In 2018,the concept of Park City and its ecological value was put forward.The content of Park City construction has been discussed concerning development strategy,economic construction,operation management,social sharing,ecological value,city brand and quality of life,ecological value.Park City construction is a frontier human settlement environment improvement project,and ecology is the background.Eco-environment value is the core of ecological value of Park City,which depends on the ecological function of the suitable plant resources in the ecological background.Based on the eco-environmental value of Park City construction,aiming at the problems in the process of Park City residential system construction,such as the shortage of suitable plant resources,different coverage of ecological space by green space system and the lack of systematicness of ecological value of Park City,relying on the domestic and foreign relevant green belt,park system,green space system and green ecological space and other ecological city construction foundation,applying the basic theories and principles of plant biological diversity,plant physiological ecology,plant community ecology and other related disciplines,adopting the research methods of field observation,literature retrieval,questionnaire,AHP,software model analysis,experimental data analysis and other research methods,this paper explores the structure of ecological green network of Park City,and reconstructs the ecological value system of Park City,and constructs the suitable plant resource system based on the classification of ecological value,and explores the application mode of typical suitable plants in ecological green network.The purpose is to enrich the connotation of the ecological value of Park City and to provide theoretical support and reference for the construction of ecological value of regional Park City.The main results are as follows:1 Based on the four ecological functions of the city's green ecological space:ecological security,protection,production and scenic recreation,the ecological green network which has the ecological value of scenic recreation and ecological protection is established with comprehensive parks,mangrove wetland and agricultural ecological pastoral by means of field observations,analysis and evaluation.Based on the four ecological functions of ecological security,protection,production and scenic recreation in the city's green ecological space,field observation,analysis and evaluation,to build an ecological green network with comprehensive parks,mangrove wetlands and agro-ecological gardens,with scenic recreation and ecological protection Ecological value.At present,it is found that urban and rural green space systems cannot effectively cover green ecological spaces.Based on the park spatial planning methods,ecological space types,and native plant resources and other theories,the paper analyzes marine ecological green network planning,ecological green networks are used to replace regional green spaces,and the ecological value of plant resourcest are studied with the help of ecological space networks.Based on the comprehensive analysis of the important habitat factors faced by regional cities and the influence of special tropical,coastal,typhoon and other natural conditions on plants and their ecological value,it is found that the wind resistance,adversity resistance and pollution prevention are the main indexes of the ecological protection category value.It's put forword that the ecological value system of green network is composed of ecological protection(wind resistance,adversity resistance,pollution prevention)and scenic recreation(ecological landscape,ecological education).2 Field observations and literature retrieval reveal that the City of Zhanjiang has 543 wild woody plant species belonging to 317 genera and 103 families;of which 25 species in 14 families belong to mangrove community and 29 species in 20 families to major tropical crops.However,suitable plants applied in ecological green network are only 202 species belonging to 79 families,of which 154 species in 47 families have been applied in parks.Especially Sonneratia apetala community is used to ecologically restore the mangrove community,and Saccharumis is the main ecological plant in the agricultural garden.The application diversity of the suitable plant resources of the green network is insufficient and foreign fast-growing woody species has been introduced excessively and that the ecological value is inadequate.3 By investigating and analyzing 543 wild woody plants and other plant resources in the city,231 species,177 genera and 72 families of suitable plants with high ecological value are collected and classified,providing material basis for the construction of suitable plant resource system.Further,according to the classification and summary of wind resistance,adversity resistance,pollution resistance,ecological landscape and ecological education,with the help of Python language code's refining advantages of reuse,free open source,modularization and functionalization,the ecological value classification database of suitable plant resources is established and updated dynamically to realize the outcome sharing of suitable plant resources system.4 Based on the evaluation of ecological value,by investigating the comprehensive parks and analyzing the characteristics of different plant resources in green network,it is found that the seasonal landscape pattern of suitable plants scenery and recreation is single,and the classification of backbone and key tree species is unclear,and that the number of foreign fast-growing tree species in mangrove wetland is too large with inefficient functions of landscape and recreation,and that the ecological products of agricultural landscape and recreation are few with low economic benefits.Based on the people-oriented demand of public ecological value of Park City,the characteristics of green network habitat and plant resources,appropriate typical suitable plant resources are selected from the resource classification,the paper reshapes the ecological value and path of the green network as follows:(1)The typical suitable plants for the construction of the ecological landscape value of the comprehensive park are:Ceiba speciose+Bauhinia blakeana+Plumeria rubra+Calliandra haematocephala+Jatropha integerrima;Terminalia catappa+B.blakeana+Callistemon rigidus+Loropetalum chinense+Ixora chinensis;Ilex rotunda+Cassia surattensis+Wodyetia bifurcata+Nerium indicum+Erythrina crista-galli+Fagraea ceilanica.(2)The typical indigenous plants for ecological education and landscape value construction of Huguang Mangrove Wetland Park are:Rhizophora stylosa,Hibiscus tiliaceus+Excoecaria agallocha(Pongamia pinnata and Thespesia populnea),Heritiera littoralis+Cerbera manghas,Avicennia marina,Aegiceras corniculatum,etc.(3)Agro-ecological garden adopts the two-layer community mode of "Artocarpus heterophyllus+Anthurium andraeanum."To construct regional suitable plant resource system,it is necessary to continuously collect the research results of plant resources with high ecological value in order to enrich the plant species in the resource pool.The study is worth further research.