| The thesis is based on the research of species of trees that exist in Yangling county. Through collecting, clearing up and analyzing to the basal datum in Yangling, it gives a plan to the species of the garden trees there. It could provide some gist and basal materials for the construction and management of gardens and ecological agriculture in Yangling. Through the investigation, the writer has known well about the species of the landscape trees as well as the applying conditions there. The main production of this Thesis is that below:①There are about 405 kinds of landscape trees in Yangling county , it was researched about 94 kinds of landscape trees in North-west A & F University. It can be concluded that the species of landscape tree in many parts are plentiful in Yangling.②There are about 228 kinds of landscape trees which are suitable for Yangling. and among them there are 87 kinds of deciduous arbores, 19 kinds of evergreen arbores, 45 kinds of evergreen shrubs,66 kinds of deciduous shrubs, 5 kinds of lianas, 6 kinds of cover plant and 6 kinds of bamboos. There are about 4 kinds of general landscape trees and 58 kinds of major landscape trees there.③The suitable proportion of planting landscape trees in Yangling is: The proportion in application amounts of the deciduous trees to the evergreen trees should be 6:4, the kinds of it should be 2:1; The proportion in application amounts of the arbores to the shrubs should be 7:3, the kinds of it should be 1:1; The proportion in application amounts of the fast trees to the slow trees should be 7:3.④Compared with Xi'an and Baoji city, the nature conditions of Yangling county is close to theirs. So it is considered that in the future the number of species of landscape tree which have potential value of application in Yangling county is 41.⑤According to the different living conditions and requests of the garden function, it gives a plan and classification to all kinds of garden fields and garden trees. |
