Research Of Ecological Landscape Greening Plants In Jinchang City

City is an organic system made from human activities and nature laws. Urban greening influences city environmental quality and has direct effect on citizen health. As development of the west regions is brought into effect, the urbanization process dramatically was increased, and concomitant environmental problems emerged gradually. Making local landscaping better is important to improve ecological environment. Landscaping is closely related with landscape planning. Landscape planning is based on plants investigation and scientific analysis. In recent years, the significant achievement of landscaping work in Jinchang city of Gansu province won the garden city of Gansu in2010province. Taking landscaping work in Jinchang city for example, this study analyzed landscaping plant resources current situation and existing problems, and gave suggestions for Jinchang landscape work in the future, as well as provided important reference other urban landscaping work in northwest.Through collecting natural climate data, wild plant species resources, and urban greening plant data in recent years in Jinchang city, and carrying in-the-spot investigation or collecting specimens, we identified plant species after consult relevant reference, and according to documents and records or relevant departments or staff, we determined the time of tree planting introduction. On-the-spot investigation included urban and suburban parks, green community, highway green belts, demonstrates the woods, organ and residential greening area, specific location including green xinhua road, jinchuan park, smelter and so on.The ornamental plants in Jinchang consist of52families,88genera,147kinds, including plants species of larger families respectively:Rosaceae, Salicaceae, Oleaceae, Cupressaceae, Pinaceae, Leguminosae, Ulmaceae, and Compositae, all species every class of total species are respectively,17.4%、9.0%、6.9%、5.6%、5.6%、4.9%、4.9%和4.2%。The ornamental tree species in Jinchang were37families,62genera,117kinds, including plants species of larger families respectively:rosaceae, Salicaceae, Oleaceae, Ulmaceae, Leguminosae, and Cupressaceae, all species each class of total species are respectively,11.1%,8.5%,21.4%6.0%,6.0%6.8. Most of this plant are deciduous arbors including19families,27genera,59species, of which the most types are Salicaceae and Ulmaceae; evergreen woody plants including2families, and7genus,16species, including Pinaceae for9species, Cupressaceae for7species, of which the most types are deciduous shrubs for16 families,30genera,40species, of which the most types are rosaceae and Ulmaceae families; Evergreen shrubs for3families,4genera,7species, of which the most types are Celastraceae for3species, Buxaceae for2species; Woody vines plants for3families,4genera,5species; Herb for14genera,20families,22species, mainly are flower plants, including most types are compositae. Evergreen and deciduous plants proportion approximately1:5. Indigenous plants for17families,24genera,30, of which the most families are Cupressaceae, Salicaceae, Rosaceae, Pinaceae, and Leguminosae, accounting for the total species in the garden plants as20.4%.The landscaping in Jinchang city has reached:four seasons stand green trees, three quarter bloom flowers.plant species of the city greening are generally less, indigenous plants are partially less and evergreen trees and deciduous trees old tree species account for smaller proportion, evergreen trees species even smaller proportion. According to this problem, the Hexi region Qilian Mountain is wild plant natural treasure. On the one hand, actively introduce tree species; on the other hand, it is positive domesticated local varieties, to further increase urban biodiversity. Jinchang is located in the northwest arid with little rainfall, although there are a lot of water-saving plant varieties, but for the require to further increase the proportion of water-saving plants, as an industrial city with severe pollution, heavy metal accumulated species are recommended planted in area of serious environmental pollution.