Study On The Landscape Evaluation And Configuration Mode Of Color-leaf Tree In Wenjiang Of Chengdu

Nowadays color-leaf tree species play an important role in Gardening and Greening because of its’varieties of colors.Wenjiang district, urban green lung of Chengdu city, the major ornamental plants-producing areas in western China,has been contuning to devote its efforts to the Construction of Ecological Landscape.Howerver,a series of problems pop up such as the lack of color-leaf tree species, introducing Alien Species blindly ect;so here comes the issue of this research,what kind of color-leaf tree species are most suitable for this distrct and, how can we get the most satisfying Landscape Effectiveness.In my research20species of color-leaf trees are chosen in particular based on their different sources、varieties and application frequencies in Wenjiang district to study its’ecological habits、biological characteristics、values of foliage and other values by AHP(Analytic Hierarchy Process) method, building Plant Landscape Evaluation System to evaluate each of the20species on its’landscape values.This is what the result shows:1、All the20chosen color-leaf tree species show its’ diversity in Life-form structure、 ornamental characteristics、ornamental season、flowering time ect. In this20species,1of them is Evergreen broad-leaf trees,1of them is Deciduous coniferous trees,9of them are Deciduous broad-leaf trees,1of them is Evergreen coniferous shrub,5of them are Evergreen broad-leaf shrubs,1of them is semi-evergreen shrubs,2of them are Deciduous shrubs,4of them are both foliage and flowers plants,1of them is both foliage and fruit plants,1of them is flower and foliage as well as fruit plants,the last14of them is foliage plants only.)2、There are mainly4types of Plant Configuation in Wenjiang district:arbor plus bush plus groundcover、arbor plus bush、arbor plus groundcover、bush plus groundcover.3、Building Plant Landscape Evaluation System by AHP method, the final study result shows that generally the qualities of color-leaf tree species in this area are mainly in the upper-middle level,lacking of the first class color-leaf tree species.There are10species are in the second class,another10species belongs to the third class in this investigation. Photinia fraseri、Nandina domestica and Ginkgo biloba get the highest comprehensive evaluation index among the20species,the scores are as follows:69.27%、68.06%、 67.79%;while the Elaeocarpus sylvestris (Lour.) Poir、Prunus×cistena and Metasequoia glyptostroboides scores are the lowest in this comprehensive evaluation, the scores of each of them perspectively is like:43.96%、49.20%、50.34%.4、Make a summary of the Wenjiang district’s landscape current situation on using color-leaf tree species,propose main problems existing,give suggetions on how to choose color-leaf tree species as well as configuration patterns,providing certain basis and reference for city’s landscape reconstruction in future.5、Discuss the key factors that impact on the landscape-bulid of color-leaf tree species,including light、temprerature ect;as well as the strongnesses and weaknesses of AHP method.