The Investigation Of Garden Plants Species In Baoji City And The Research On Construction Of Forest City

Based on the investigation of the baisc variety of trees in Baoji city, this article mainly analyzed the structure characteristic and the ecology function of trees in Baoji city, and carried on the landscape appraisal of several typical groups. Simultaneously,proposed suggestions of the optimizes way of green system structure.The main conclusion is as follows:1.Baoji city have 75 branches 189 genus and 335 kinds of garden plants altogether,among which have 60 branches 146 genus 258 kinds of double seed leaf plant. The mainly branches are Pinaceae,Cupressaceae,Cadrifoliaceae,Salicaceae,Rosaceae,Leguminosae,Oleaceae and so on. The indigenous plant ocupies 138 kinds and the introduced plant ocupies 197 kinds in 355 sorts of sub-plants,the introduced plant account for a higher proportion in the plant composition.2.There are 197 kinds foreign plants and 138 kinds indigenous plants among garden plants in Baoji, account for 41 percent of the total, and the degree of nature is not well.3. The diameter level structure of flora are most in grade 3 (the chest diameter 10～20cm), which presents a shuttle structure and belongs to a stable diameter level disposition in Baoji.4. Among the hight level structure of flora in Baoji, the quantity of trees which of 1.00～2.99m locate the second sub-grade of trees and bushes are most,which account for 32.79 percent and of 16.00～25.00m which locate the first sub-grade of bushes are lowest, which only account for 1.61 percent.5. According to the appearance of Baoji city's flora,Weihe River, park and the north slope are primarily foliage.6. Judging from the whole species multiplicity of plants in Baoji city,the species multiply index in the park is the highest,following which are Wei river,aquare and the area of factory.The index of the north slope is the worst,The species multiple index of arbor is higher than of bushes.7. Six kinds trees have higher important value, are Prunus cerasifera,Cedrus deodara, Salix matsudana,Ligustrum lucidum,Ailanthus altissima,Prunus davidiana,Catalpa ovata,Cornus alba,Sopnorajaponlca.cuchlnensis, Chaenomeles speciosa,Phyllostachys nigra,Albizzia julibrissin,Pittosporum tobira which have the lowest important value.8. Through research of the anti-pollution ability of six kinds trees which have higher important value, the conclusion revealed the ability of anti-pollution is that Cedrus deodara>Ligustrum lucidum>Prunus cerasifera>Salix matsudana>Ailanthus altissima>Prunus davidiana.9. I use the AHP to evaluate the plants community , judged from the whole aspect ,the flora landscape appraisal of Baoji is not very good,the highest flora landscape value is 6.8019 which belongs to the parks, this explained the whole flora landscape of Baoji need to enhance .10.I put forward a better method to construct forest city in Baoji city.