| The paper selects the urban green space landscape of Huhhot city as research target, with most information originated from Quick bird image. The study is based on the remote sensing images analysis and ground investigation of the current situation of urban green space in Huhhot city, as well as the related theories of statistics, plant physiology, landscape ecology and ecology of urban green space system, and the research methods adopted include 3 S technology, field investigation, and scientific experiment. The paper mainly studies makeup of species and comprehensive assessment and gradation of urban green landscape plants, as well as the seed selection and stress resistance of limber pine, the ability of main evergreen trees to remove dusts, and the pattern of urban green space. On the basis of all above, with the purpose of perfecting the urban ecological functions, improving urban environmental quality, and promoting urban sustainable development, the paper proposes the principles and blue print of urban green space landscape programming for the city of Huhhot. The main research findings are as following.(1) Landscape plants include 122 species, in Huhhot City. On the basis of the survey on the plant resource, the main index factors are fixed and assessment factors system is established. The paper also comprehensively assesses and categorizes the 122 kinds of plants. The main trees selected are Pinus tabuliformis, savin, juniper, arborvitae, populusbolleana, Saffron robinia, Sophora japonica, and Chinese scholartree. The propotion of evergreen trees is low, which, to certain degree, leads to the dullness of plant levels and the depression of landscape, and impairs the effect of plant landscape. In the following years, the introduction of evergreen tree breeds would be a very significant job.(2) The difference between dust removal functions of different evergreen trees is large, and the difference can be four times sometimes. The dust removal function is influenced by the crown shape, the leaf arrangement, the characteristics of leaf shape, and cross section of the leaf. The dusts-removing abilities of four types of evergreen trees are ranked as: spruce, needle juniper, Sabina chinensis, and pitch pine. Different heights and different directions can also lead to different abilities to remove dust. This can provide consulting information for the selection of trees breed of Huhhot city.(3) The distribution and pattern of urban green space landscape in Huhhot city is not reasonable enough. The shortcomings include: distribution of green space in the park is not equal; the street green space and residence green space are not sufficient; The distribution of large green belt is unbalanced, for most large green belts are located in the middle and east area, while the west and southern area are in great shortage; the number of small greenbelt is a great advantage, and the rate of green belt fragmentation is high; the area of linear green space is small, and the density of corridor landscape is low, which is a disadvantage to protect the diversity of urban species and perform the ecological function of landscape.(4) The paper puts forward the reasonable pattern of green space in the city of Huhhot, which includes two circles, two belts, multi-gardens, crossing, and ring and radial system. In order to improve the environmental quality and ecological function of the city of Huhhot, green space rate should reach 38%, and the proportion of large green belt should be raised, while the fragmentation rate of landscape should be reduced. Great effort should be made to construct green corridor landscape, meanwhile the proportion of various plants should be fixed, and the main tree breeds of urban green space should be selected scientifically. |
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