Research On Plants Landscape Evaluating And Optimizing Of The Highway In Jiangxi Province

The paper through the survey and research on the current situation of greening of highway in Jiangxi province,which were built and opened a few years ago.The results showed that there were some big differencies between formerly and lately in the plant landscape.Therefore,this paper survey and analysis on the plant communities and plant landscape of the highway.And then,some specific optimization measures of plant landscape were put forward along the region's highway.The main research aspects as following:(1)Through the survey and research on the various types of greening along the highway in Jiangxi province,The author summarized plant selection requirements of the main highway link sites in the region (including the central strip,slope,road sides,exchange area,service area,etc). Meanwhile,in order to further the selection of plants,this paper select the closely related to vegetation climate were two important factors-temperature and rainfall and the two most closely related to climate geographical elements-longitude,latitude,elevation,total of five indicators as elements of division factor,and then distinguished the vegetation and climate resources of Jiangxi province.The results showed that it could be divided into four vegetation zone:mountain area of southern part of Jiangxi province,the hilly area of middle of Jiangxi province,plain area of north of Poyang Lake,and the northeastern mountain region of Jiangxi province.And then under the natural conditions of each area,selected the landscape plants of corresponding vegetation zone.(2)Through the analyzed of the plant communities of a representative highway,it showed that the species within the highway type of plot was not enough rich and plant communities is not stable enough.Meanwhile,through the contrast of early greening and the present status of greening,found that most of the introduction of alien species had completely disappeared,but the native plants were retained most.(3) Through introducing AHP evaluation method, and by building evaluation matrix,from three aspect such as the ecological aesthetics,the visual landscape, security features,the paper was based on the evaluate of plant landscape on both roadsides and exchanges of six highway,which were different vegetation area and different construction times of Jiangxi province,it showed that 87.5% of the comprehensive highway level III in the following rating scale,the plant landscape were relatively poor,and it need to optimize and improve the green space of various types of highway.(4)Took Changzhang highway as an example,the paper proposes a highway on the mountainous and hilly areas related optimization goals and philosophy,at the same time,some detailed optimizations of various types of green space along the highway were put forward.And reference could be provided for the design and construction of similar projects.