Study On The Optimization Of Plant Disposition Models Of Green Space System In Urumqi City

Green space is the most important part in urban ecosystem, the optimization of plant disposition has an important effect on the perfect function of urban ecosystem. Urumqi is a typical arid oasis city, with fragile ecological environment originally. As the industrialization and urbanization speed up the process, the demand for green space become more and more, but in the process of the development of city, we have little cognition about the service value of green space. The number and the quality isn't satisfied the need of the city's development, according to the principle of community ecology design and optimization the urban green space system. It has an important significance to the urban green space system.This paper makes study on the road green space, the park green space and the residential green space in Urumqi city. Choose 13 plots and 69 quadrates,select 5 evaluation indexes of ecological suitability and 8 evaluation situation indexes of stability as evaluation index, Grade division and valuation about evaluation index, evaluation index weight by expert consultation, set up models about ecological suitability and stability of different green-land plants disposition, using index sum method calculate the result.The results showed that: (1) Tree Species Selection and plant disposition of three green-land plants related to site conditions and ecological function. (2) The best comprehensive evaluation in three green space is the residential green space. (3) Optimization of plant disposition models of three green space. Combined with the investigation and evaluation results, analysis the problems on plant disposition of three green space, By means of indexes of ecological suitability and stability of three green space, put forward the optimization of plant disposition Models of three Green Space Systems.This research has important significance for the functional area Planning and Construction of Urban green space, improvement and benefit of present green space, the near-natural administration with low cost, promoting the construction step of urban garden and green space system Sustainable Development.