| In recent years,with the rapid development of urbanization in northwest China,the ecological problems brought about by the urbanization process have put forward more ecological functional needs for the urban green landscape construction in northwest China.In view of the characteristics of urban ecological environment in northwest China,the ecological factors affecting the growth of plant communities are improved by means of site design,and the site habitat conditions suitable for the natural succession of biological communities are constructed by artificial construction.Among them,soil is an important direct influence factor in site habitat conditions,and terrain,as an important design element of urban green space construction,will have an impact on soil environment,thus indirectly affecting the growth of plant communities.Therefore,looking for the relationship between terrain design and plant community planting design,exploring the influence of terrain design on soil environmental conditions,and carrying out the research of topographic design method based on the concept of habitat construction are the problems faced and needed to be solved in the study of "habitat construction" of the scale ecological design of environmental site construction in northwest China.Based on the multi-disciplinary research perspective,this study summarizes the research results on the influence of topography on soil environment in other related disciplines,constructs the theoretical model basis of research,and explores the influence of terrain design on the soil environment and the species of suitable plants on the surface of terrain space by means of field investigation and test,laboratory quantitative analysis and software analysis.Finally,an attempt is made to construct a topographic design method and a design process for habitats that create suitable habitat conditions for different onshore plant types through topographic design.The main research contents and conclusions are as follows:Firstly,based on the multi-disciplinary perspective,by combing the research results of the spatial heterogeneity distribution of soil environment under the influence of topographic factors,this paper summarizes the concrete contents and methods of the influence of topographic factors on soil environment in the environment,and then based on the basic theory and results of "site habitat Zoning",The classification of habitat types under the influence of soil moisture and soil bulk weight was constructed,which was used as the basic theoretical model of investigation and research.Secondly,through the data analysis of field investigation and test and the analysis of vegetation status,the influence of terrain slope,slope position,slope shape and slope on soil moisture and soil bulk weight on the surface of urban green space terrain is verified,and its influence is analyzed by the method of site habitat type Division.Based on this,this paper summarizes the types of soil factor habitat common to four kinds of urban green space terrain--"soil moisture suitability-soil tightening area","soil moisture humidification-soil tightening area","soil moisture suitability-soil compaction area" and "soil moisture light drought-soil compaction zone",and puts forward the corresponding topographic design method for each habitat type.,Combined with the investigation of plant landscape status,the planting design strategy of terrain space is put forward.Finally,combining with the practical application,this paper puts forward the terrain design process of habitat construction-site soil factor investigation and evaluation,site soil factor habitat Type Division,site soil Resources protection and utilization and optimization improvement,terrain optimization layout and habitat construction,habitat zoning and plant community structure,site sustainable management and continuity design. |
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