Study On Plant Diversity Conservation Plan Of Khorgas City

This study is targeted at "wild plants and urban garden plants" in Khorgas city.With methods like field survey,literature collection and data statistics,this paper puts theories of urban ecology and botany into the study on plant diversity conservation in Khorgas.Through surveys on species diversity of plants and urban ecological sensitivity,it analyzes plant diversity condition in Khorgas from four aspects,namely genetic diversity,species diversity,landscape diversity and ecosystem diversity.Based on the abovementioned content,study on plant diversity conservation plan of Khorgas is conducted,and results are as follows:There are altogether 100 families,475 genera,940 species of vascular plants in study area,among which are mainly angiosperm.There are 10 families of plants whose number of species surpass 20,and they are respectively caryophyllaceae with 27 species,liliaceae with 23 species,gramineae with 83 species,buttercup family with 31 species,mustard family with 39 species,rose family with 57 species,leguminosae with 76 species,borraginaceae with 23 species,labiatae with 46 species and the composite family with 110 species.Plants employed in urban garden contain 51 families,118 genera,154 species,among which there are 47 species of macrophanerophytes,24 species of shrub and 83 species of herbaceous plants.And there are 41 species of rare and endangered protected plants under protection within the city.Plant species diversity index(Shannon-Wiener and Simpson),Pielou evenness index and species richness of park greene space in Khorgas city all manifest that macrophanerophytes stratum is highest,shrub stratum secondary and herbaceous stratum the lowest.Species richness of herbaceous stratum in accessory green space and road green space is the highest.Plant dominance index of shrub stratum ranks first among three kinds of green space.The areas of ecological sensitivity in Khorgas city,from low to high,are 504.79km2?511.03km2?408.90km2?and 483.83 km2 respectively.Area with sensitivity higher than medium degree reaches 892.73 km2,which accounts for 46.78%of the total.Plant diversity conservation policy of "two kinds of protection,four layers" for Khorgas city is proposed,and distribution characteristics of plant substrate for newly founded city is explored.The overall plant diversity conservation pattern is divided into three substrate areas,five ecological function areas and three ecological corridors,which constructs "five areas,three belts and multiple points" pattern on the whole.Two water habitat reserves,one mountainous habitat reserve and five urban habitat reserves are divided to form ecological conservation network of Khorgas city.One nature reserve,two forest parks,two ecological parks and multiple urban parks are planned and to be constructed.Take main traffic roads in city as landscape corridors,and river system in city as ecological corridors.Connect nature reserve and five ecological function areas with urban parks,to form plant diversity conservation network of Khorgas city.