Survey And Research On Landscape Plant In Fengcheng City

With the rapid development of economy,urban environmental problems have become increasingly prominent.Urban space is facing expansion,greening can not supply the current needs,adding green with the addition of colors has become the development trend of our country.Under the general trend,it is necessary to master the present situation of greening in every urban area,in order to guide the construction of local garden greenbelt.Taking Fengcheng city as an example,this paper makes a survey on urban garden greenbelt,in order to provide reference materials for improving the greening level in urban area.In this paper,through the field investigation by present situation of the application of landscape greening tree species,selecting the sample quads conduct field survey of plant communities.The community structure characteristics and quantitative characteristics of different types of green space were analyzed in detail.The AHP method was used to evaluate the pre-screening tree species.Finally,on the basis of the above,the present situation of urban greening is summarized,and propose optimization strategy and configuration recommendation.The main conclusions are as following:(1)The composition of landscape plants: There were 312 species of garden plants in Fengcheng city,belonging to 210 genera of 94 families.Arbor accounts for more than half of the 59.6%,there were 186 species.The others were 75 species of shrubs,39 species of herbs and 12 species of lianas.And the largest family was Rosaceae,the largest genus was Michelia.The flora was dominated by tropical distribution and temperate distribution,it is adapts to local climatic conditions.The main ornamental plants species were leaf-viewing(35.6%),flower-viewing(30.4%),fruit-viewing(12.5%)and branches-viewing(2.6%).The Most important of the leaves observation was autumn color(65.8%);and the main flowers-viewing were white flowers(34.7%)?safflower flowers(27.4%)and yellow flower(26.3%);The main viewing fruit were red fruit(43.6%).The viewing season was mainly concentrated in autumn and spring.(2)Plant community characteristics: in addition to road green land,In 54 sample plots of the other four kinds of green land the average density of arbor was 6.67 plants/100?,and the average height was 5.44 m.The average density of shrubs was 3.29 plants/100? and the average height was 1.93 m.The average density of pigmented seedlings was20.21 ?/ 100 ? and the average height is 0.82 m.respectively,The number of arbor and shrubs was 2.03:1,the average species ratio of arbor and shrubs was 1.82:1.the average Gleson exponent and Simpson exponential were 1.78 and 0.68.The most important arbor ranked in the top ten were Osmanthus fragrans > Cinnamomum camphora > Magnolia >Elaeocarpus decipiens > Purple Leaf Plum > flowering Cherry > Ginkgo biloba >Magnolia officinalis > Koelreuteria bipinnata > Acerpalmatum Thunb.The most important shrubs ranked in the top ten were: Lagerstroemia > Camellia > Pittosporumtobira >Loropetalum chinense > Photinia glabra > Hibiscus hibiscus L.> Michelia > Ligustrum quihoui > cercis chinensis > hibiscus.The most important pigmented seedling ranked in the top ten were Photinia glabra > rhododendron > Loropetalum chinense > Ligustrum quihoui > Camellia sasanqua > Mahonia fortunei > Gardenia jasminoides > Camellia sasanqua > Fatsia japonica > Convexa Makino.(3)The evaluation results of AHP method showed:the proportion of each index layer is: adaptability(0.4687)> ornamental(0.28)> ecology(0.1361)> economy(0.1152).The evaluation grade of tree species was mainly 2 grade and 3 grade,accounting for 52.6%of tree species.and the tree species with the highest overall score was Cinnamomum camphora.