Plant Resources Analysis And Landscape Evaluation Of Xinjiang Yili Section Of National Highway G218

Xinjiang Yili section of national highway G218 is located in the eastern region of Yili Valley in Xinjiang Yili Kazak Autonomous Prefecture. The starting point is located in which starts from the south side of Dun Mazar town to Nalati mountain pass and the overall length is 203.288 km.With typical sample plot and overall survey methods, we conducted a survey on road field plants of Xinjiang Yili section of national highway G218. The results show that the region has a total of wild vascular plants of 48 families 109 genera and 139 species, angiosperm has absolute advantage, the floristic composition of genera are divided into 9 forms 7 distribution type. The geographical composition mostly is the north temperate distribution type, followed by the Old World Temperate, and then are the pan tropical distribution and the Mediterranean to Central Asia, West Asia. The composition of the flora showed diversity, The dominant families are distinct.The results showed that the natural vegetation along the road can be divided into 4 vegetation types, 5 vegetation subtypes, 9 formations. Artificial vegetation could be classified into 2 vegetation types, 3 vegetation subtypes, 5 formations; the main vegetation types are desert and grassland. The northern river valley plain area mainly gives priority to the desert of Seriphidium terrae Albae and Conyza canadensis. Seriphidium terrae Albae has absolute advantage in Piedmont alluvial fan area. Low Mountain hilly area mainly covered by the farmland.Analysis on the landscape of each element of Xinjiang Yili section of national highway G218, from the natural and human landscape analyzed the constitute elements of each landscape and their influence on the landscape of the road. Constructing the landscape evaluation index system, which included 16 evaluation factors. Each evaluation factor was divided into three grades, assignment according to the important degree. Experts weighted the value of each landscape evaluation factors and then scored for them. According to the detailed information of field reconnaissance and the road landscape features of Xinjiang Yili section of national highway G218, using landscape comprehensive evaluation index method to calculate, the result showed that Xinjiang Yili section of national highway G218 was in grade II according to the grade standard of highway landscape classification, that was the highway construction and the landscape of the road region was relative harmonious. This indicated that the design of Xinjiang Yili section of national highway G218 was reasonable, and it made the natural landscape and human landscape resources to the greatest extent of protection and utilization.