Study On Plant Diversity And Its Protection Of Qinglongshan Nature Reserve In Guangxi

Guangxi Qinglongshan autonomous region Nature Reserve is located in the Longzhou Country of Guangxi province which is border area between China and Vietnam.It is located in the limestone area of Southwest China,one of the 17 key areas of biodiversity in China.In order to find out the resources of the protected area,the investigation of plant resources was carried out in the reserve.With the help of satellite pictures,visited the local forestry workers,identified and carried out key surveys in the areas with rich plant diversity and better vegetation.We studied the basic composition and traits of plant in the protected area;analysed plant species diversity and distribution pattern from the point of families and genera in Nature Reserve,summarized the basic characteristics of the flora,and explored the characteristics of vegetation types and the plant distribution with terrain factors in Guangxi ChunxiuNature Reserve;On the basis that find out the situation of exploitation and utilization in the plant resources,puted forward the protection measures and suggestions on protecting plant resources,provided reference and theoretical basis for the plan and design?development and sustainable utilization in plant resources of Nature Reserve.The main results are as follows:(1)There are 1140 species wild vascular plants in Guangxi Qinglongshan autonomous region Nature Reserve,which belonging to 177 genera of 686 families(including subspecies,varieties and variants,the same below),of which the ferns belonging to 27 families of 42 genera and 75 species;the gymnosperms belonging to 3 families of 3 genera and 6 species;the angiosperms belonging to 148 families of 641 genera and 1059 species.(2)The distribution of tropical genera,Asia tropical genera and Old World tropical genera have a large proportion in the level of genera,and the distribution of the 3 types are a total of about 323,accounting for about 50.18%of the total genera.There are a total of 40 genera(type 1)in the distribution of world wide,the tropical distribution(from type 2 to type7)of 506 genera,accounting for about 78.59%of the total number of genera.The distribution of temperate zone(from type 8 to type 14)is 97;The distribution of endemic Chinese(type 15)is 7,accounting for about 1.09%of the total number of genera.The ratio of tropical genera and temperate genera(R/T)was 5.22,which indicated that the nature flora of seed plant was dominated by tropical genera in Nature Reserve.(3)The characteristics of vegetation in Nature Reserve:the plant floristic composition is dominated by tropic;the dominant species are obvious,species composition is not rich;the proportion of the calcium parent or the calcium-tolerant plants is large;Different soil parent material and plant growth of the soil in Nature Reserve,resulting in differences in the horizontal distribution of vegetation;the vertical distribution of vegetation are not obvious,because of mountain height difference is low.The natural vegetations are divided into 4 groups of vegetational type,7 vegetational types and 23 families in Nature Reserve,the artificial vegetations are mainly divided into 3 vegetational types and 8 families by purpose.(4)The forestry area is 14711.5hm2in Nature Reserve,and the forestry coverage rate is 86.9%.The pure forestry area is 6946.9hm2 in Nature Reserve,the mixed forestry area is 5.5hm2,and the shrub forestry area which specially stipulated by the state is 7541.2hm2.The wild resources plants can be divided into 13 kinds in Nature Reserve according to their uses.The resources plants have the characteristics of complete type and a great variety.(5)There are 15 species of national key protected plants in Nature Reserve,among which 2 species of classl national key protected plants(belonging to 1 families of 1 genera);13 species of class? national key protected plants(belonging to 12 families of 13 genera);57 species of Guangxi provincial key protected plants,belonging to 11 families of 38 genera.(6)The biological geographical location of Nature Reserve is unique,abundant speices biodiversity,rich in ecosystem diversity and genetic diversity,it has good ecological benefits such as water and soil conservation,species conservation,gene reserve,air purification,climate regulation,with good social and economic benefits.The following recommendations are made to sloving the problems which existed in Nature Reserve.