| Landscape transition of city and country is a unique ecological interface that formed in the development of urbanization,its manifestation is mainly based on plant greening,suburban vegetation and urban landscape together to create urban greening system.By its own unique plant photosynthesis and respiration,plants use and convert light energy from nature,plants create a natural material conversion and energy flow for the city,plants provide many ecological functions such as saving the carbon energy,adjust the temperature and humidity,reduce noise,keep dust,store rain and so on for the city.Plants contribute to a virtuous cycle of urban environment.With the regional economic development,urban greening model continues to extend to the suburbs and rural areas,urban and rural greening gradually integrated.Urban and rural unified green system impact and feedback effective object is the urban and rural transition landscape green.The ecological potential of plants in the transitional landscape area is an important factor to evaluate the landscape ecology of urban and rural.In this paper,taking the boundary belt of Tongchuan Town and TaLaHao Township in eastern Dongsheng District of Ordos City as an example,on the basis of climate conditions,soil conditions and humanistic construction,the local plant samples were measured.Sample establish land 14,a total of 54 major greenbelt plants were constructed,and the growth characteristics of tree height,crown width,DBH and leaf area of 41 species were recorded.Finally,we selected SophorajaponicaLinn,Populus alba,Euonymus maackii Rupr,Picea meyeri Rehd.et Wils.,Sophora japonica,Siberian Apricot,Amygdalus triloba(Lindl.)Ricker and Ulmus macrocarpa Hance as the main tree species to perform quantitative analysis.The plant height,crown width,crown height and leaf curtain thickness were used to calculate the three-dimensional green quantity and leaf area index.And to establish the regression equation between them and the correlation analysis.(1)The equation and regression equation of the green quantity of the population of SophorajaponicaLinn,Populus alba,Euonymus maackii Rupr,Picea meyeri Rehd.et Wils.,Sophora japonica,Siberian Apricot,Amygdalus triloba(Lindl.)Ricker and Ulmus macrocarpa Hance were established in Tongchuan Town and TaLaHao Township,Dongsheng District,Ordos City.(2)The order of the average Living Vegetation Volume quantity of the eight plants in(?)certain canopy height range:Populus alba(56.99m~3)>SophorajaponicaLinn(22.13m~3)>Sophora japonica(13.31m~3)>Armeniaca sibirica(L.)Lam(12.10m~3)>Ulmus macrocarpa Hance(5.51m)>Picea meyeri Rehd.et Wils.(2.34m~3)>Amygdalus triloba(Lindl.)Ricker(1.14m~3)>Euonymus maackii Rupr(0.69m~3)。The average leaf area index of the eight plants:Populus alba(233.96)>Ulmus macrocarpa Hance(161.19)>Picea meyeri Rehd.et Wils.(138.12)>Sophora japonica(18.09)>SophorajaponicaLinn(15.81)>Amygdalus triloba(Lindl.)Ricker(13.30)>Euonymus maackii Rupr(5.24)>Armeniaca sibirica(L.)Lam(3.55),From the data can be intuitively seen,although the same growth environment of plants,but the canopy saturation is significantly different,but also indirectly reflects the growth of plants.(3)The binary regression equation of green and DBH was established,and it was found that they had significant correlation.The deciduous tree index:Populus alba(0.686)>SophorajaponicaLinn(0.669)>Ulmus macrocarpa Hance(0.586)>Euonymus maackii Rupr(0.341)>Amygdalus triloba(Lindl.)Ricker(0.191)>Armeniaca sibirica(L.)Lamt(0.081);The index of coniferous trees:Sophora japonica(0.684)>Picea meyeri Rehd.et Wils.(0.261).It can be seen which indicates that the stem growth is robust and the branches with obvious layers have greater influence on the green quantity of the plant.(4)This paper studies the quantitative statistics of the plants in this area,analyzes the various morphological indexes of the tree species with the three-dimensional green quantity and leaf area indices,and provides more reference for the local landscaping combined with the main plant types. |
PDF Full Text Request