| The construction of urban forest city people and nature is an important foundation of harmony. Build urban forest can create a beautiful, safe and comfortable living environment. The urban forest construction according to the current situation, city more consideration of possible development trend and the new problems of long-term planning.So in some of the construction scale, and the technology of configuration, and overall layout planning, people need to consider the future urban development demand. City-Tree are an important part of urban forest. With the urban landscape and urban beautifying culture of construction work gradually, urban landscape plant plan and the establishment of the City-Tree by the government and the citizens are increasingly attention. The City-Tree gradually as the urban forest construction scheme of the foundation.Now all the cities in building urban forest. This study is given in the construction of urban forest linked plays a more and more important role. Research in the urban forest and linked theory, practice and research on the basis of dynamic,and combined with city ecology, landscape ecology, forest ecology, landscape science knowledge. For example Zunyi,use yaahp ArcGIS, such software, analysis of the construction of urban forest zhunyi city forest construction, pointed out the shortage. On this basis, it is proposed to construct a set of quantitative and qualitative analysis and the hierarchical tree, ShiXiaoHua linked evaluation index system. Using analytic hierarchy process (AHP) to recruit for quantitative evaluation of trees. Selected species, and through linked to build urban forest culture linked. Put forward the construction of urban forest zhunyi city urban forest, countermeasures for the layout pattern and community tree species selection and configuration offers scientific basis.(1) 2000-2004,the built up area and city proper of the amount of green area has been sustained increase. Green of the cycle growth of rate is 9.32%,8.35%,5.07%,24%, The average growth rate of green is 8.67% every year。But the city of the total land area is continuing to reduce. The rapid urbanization process and provide habitats for wildlife naturally of woods and grass, the loss of farmland. Ecological green structure and functions of Zunyi in a rapid change. Need for streamlining the structure and composition of the city and improve the quality of urban environment and services, maintain ecological equilibrium.(2) 2000-2004,city greenery patches of the seven wonders of the type of the area of sustainable growth. Various patches in proportion of the landscape of differences decrease gradually. But the green area ratio is the lowest, and with other types are considerable. The road of the common indicators are lower.29 the main road of the built up area of the rate of less than 25% of the road in a majority of cases. The trees are very limited choice. Main road trees most only four. But only a roadside accounted for half of the road. Some roads are no trees, and the rich plant resources to form bright contrast. The path that the plant disposition not fully using the local plant resources advantage, and not a feature of the landscape. Proposal as soon as the selection of the City-tree. In the planning and construction, strengthen construction of the road.(3) Follow the principle of selection, construction of six linked the linked evaluation index system. The tree of appraisal target system includes of the ecological functions, cultural, or suitable and aesthetics of four target indicators and targets. on 15 factor. One of the biggest, cultural index weight is 0.4094. According to this study built linked species evaluation index system for the selection of a header values. Comprehensive test eight of these trees are five kinds of. A comprehensive test by high to low is Ginkgo biloba, Cinnamomum camphora, Osmanthus fragrans, Cupressus funebris and Pinus massoniana. Give priority to recommend alternative solution as the tree for the public choose. Suggestions in urban road construction plan or planted widely linked linked park, square. Make it become urban forest ecological culture.(4) The urban forest coverage for 37.3%. The urban forest forest coverage rate for 42.3% suburb. Per capita public greenbelt area is 9.5 square meters. Favorable rate reaches 86%. Road greening rate of 82.05%. Native species, the proportion of space for 85%. The urban forest nature of 0.5. Promulgated by the state forestry administration control index number, in coverage, forest ecological networks, forest health has reached national standards of urban forest created. Combined with the land use planning, and put forward the construction of urban forest layout is"One more, trinity, three forest and three layers, 5color harmony." According to the theory of urban forest construction. And on this basis, the main types of the green tree species selection and configuration Ensure the urban forest resources in spatial layout, reasonable configuration. |
