The Research Of Urban Forest Construction In Qingdao City

The concept,historical development and current status of urban forestry have been introduced in this thesis.The tree species selection ,species planning and other urgent problems meted in the development of Qingdao urban forestry have been discussed in detail.1.Concept of urban forestry is comprehensive and dynamics in nature;it was developed from long historical process.Urban forestry generally means plant flora and ecosystem of the entire areas.It plays a very important rule in improving ecological conditions and sustainable development.2.Tree species resources of Qingdao city consists of 400 plant species,including 200 species of arbor,139 species of bush,34 species of ground cover and 3 species of bamboo.The forest populations consists of mixed needle-coniferous tree stands,evergreen broad-leaf forest and evergreen needle forest.Based on the theoretical basis and principal requirement of Qingdao urban forestry,the following tree species are selections as principal tree species:Robinia pseudoacacia L., Platanus orientalis L., Pinus thunbergii Parl., Cedrus deodara G.Don., Populus tomentosa Carr., Sabina chinensis cv.Kaizuca, Camellia japonica L.,Ginkgo biloba L., Celtis sinensis Pers., Zelkova schneideriana Hand.-Mazz., Acer truncatum Bunge, Albizia julibrissin Durazz., Ailanthus altissima(Mill.) Swingle, Cerasus serrulata (Lindal.)G.,Pistacia chinensis Bunge, Euonymas japonicus Thunb.Sabina konarovii Chent at W.T.Wang, Sabina chinensis cv.Pfitzeriana.3.Tree planning on urban forestry construction of Qingdao city is based on trees investigation,analyses, appraise and under the guidance of the theories on city ecology, ecological landscape, scenic aesthetics, city planning and etc.Also it synthesize the natural law on vegetation distribution and the present situation on urban forestry construction to define the main proportion on urban species actually:the proportion between aiphyllus tree and deciduous tree is 3:7; the proportion between arbor and shrub is 2:1; the proportion between coniferous tree and broadleaf tree is 1:4; the proportion between fast-growing trees and slow-growing trees is 1:1.The following tree species programmed in urban forestry construction of Qingdao on the above-mentioned demanding on trees planning in this thesis...