| Urban greening construction, as a part of city construction, have brought some problems during getting some achivement,such as unobvious city greening characteristic, single in green plant species, paying too much attention to application of exotic plants, ignorance of local indigenous plant etc. For this reason, this paper puts forward a concept of" dominant trees", it makes the characteristic of city greening be formed by a planning of dominant trees for city greening, and promotes the construction of city characteristics.On the basis of situation Investigation and analysis of main city greening plants of Longyan, by applying the basic theory of urban ecology, phytocoenology, plant landscaping, urban green space planning and the expert investigation method and ahp, we researched on dominant trees for city greening of Longyan city. Results go as follow:(1) Dominant trees for city greening are parties of trees for city greening, so similar method and content are adopted when evaluating and planning. Finally, conclude the method and the content of evaluating and planning on dominant trees for city greening(2) under the direction of theoretical research, on the basis of urban greenery plants situation investigation of Longyan, this paper concludes and arranges about city greening and characteristic status and plant diversity status, then analyses urban plants flora and life form of Longyan city, obtains that:①universal subtropical distributed families are the advantages in urban greening plants, simultaneously contains a certain worldwide composition,which equates with the subtropical geographical position it locates;②The ratio of miniature phanerophytes in total unban greening plants is the largest, which adds up to 46.46%,and The ratio of large phanerophytes in total unban greening plants is the smallest, which only adds up to 9.09%,those show that aged trees of Longyan are lack and the construction process of landscaping is primary;the ratio of deciduous tree species and evergreen tree ones is about 1:3, this landscape constructed by species structure is not outstanding in seasonal aspect variety.(3) Applying ahp to establish comprehensive evaluation index system model for green plants of Longyan city, calculating landscape plants comprehensive index of Longyan then classify the plants. Lastly, according to planning principles for dominant trees of city greening,combining with status of Longyan, plant 48kinds of dominant plants of Longyan greening from a city wide area,thereinto 18 kinds of arbors,12 kinds of shrubs,7 kinds of palm,6 kinds of bamboo,6 kinds of vines.Plant dominant plants of typical types green space:plant 23 kinds of dominant plants of road green space, thereinto 15 kinds of arbors,8 kinds of shrubs; plant 42 kinds of dominant plants of residential district green space, thereinto 13 kinds of arbors,11 kinds of shrubs,6 kinds of palm,5 kinds of bamboo,7 kinds of vines; plant 48 kinds of dominant plants of park green space, thereinto 16 kinds of arbors,14kinds of shrubs,6 kinds of palm,6 kinds of bamboo,6 kinds of vines;plant 22 kinds of dominant plants of scenery section green space, thereinto 13 kinds of arbors,6kinds of shrubs,1 kinds of palm,1 kinds of bamboo,2 kinds of vines; plant 4 kinds of dominant plants of industry green space:31 kinds of resisting toxic gas plants,22 kinds of relieveing dust plants,9 kinds of fireproofing plants,14 kinds of windproofing plants。The preliminary exploration of dominant trees for city greening must exist some deficiency, as concept of city greening dominant trees needs to perfect, the comprehensive evaluation index system model for green plants needs further perfect, planning content and method of dominant trees for city greening need to verify and improve; so as to provide more scientific and rational reference for selection and planning of dominant trees for city greening, and the phenomenon of characteristic deficiency. |
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