Analysis On Plant Community Characteristics And Resource Utilization In The Border Of Badain Jaran Desert

Desert vegetation is an important part of desert ecosystem and plays an important role in the process of desert formation. From the progress of researches over the years, the study of vegetative community characteristics and resource utilization the in Badain Jaran Desert is not as prefect as the characteristics of aeolian geomorphology. The article selects the vegetative distribution in the entire margin area of Badain Jaran Desert as the research subject, and applies professional knowledge such as sand physics, sand geomorphology, phytogeographical and ecology. We choose the growth conditions of vegetation and habitats such as climate, geographical location, terrain and soil of laboratory test analysis which were recorded by field trips as the research object. Then use software such as ARCGIS10.2, CANOCO4.5 and Mann-kendall test to study from three aspects:characteristics of vegetative community, coherent relationship between habitats and vegetative distribution pattern in growing areas, and division, protection, development and utilization of vegetative resources. It provides a reference for the Badain Jaran Desert with vegetative restoration and protection of plant resources. The main conclusions of the article are as follows:(1) The distribution of flora and life form spectrum. There are 13 families,30 genera and 32 kinds recorded in the study area including gymnosperms 1 family,1 genus and 1 kind, and angiosperms 12 families,29 genera and 31 kinds. The distribution pattern of natural vegetation family has five types. The distribution of genera can be attributed into 7 categories and 13 classes. It indicates that flora has a close relationship with vegetation in ancient mediterranean region, and also reflects temperate continental climate of the flora. The vegetation in study areas can be divided into 6 life forms:arbors, shrubs, small shrubs, subshrubs, perennial herbs and annual herbs. Shrubs have the most abundant species of plants and the most widely distribution. Second is the perennial herb, while arbors have the least distribution.(2) The characteristics of vegetation. Species richness and diversity in the southeastern area of Badain Jaran Desert are higher than northwest area. Evenness and richness show the contrary variation. Relatively speaking, arbor and shrubs have higher diversity in the southeastern edge. Herbs have higher diversity in the northwest edge. Herbs show more evenness than arbor and shrubs.(3) The characteristics of habitats. Analyze soil properties in each study area. The content of N and K are the highest in P1 study area. The content of soil water is the highest in P6 study area, but the soil is partial to acidity. Analyze soil macroelements and trace elements according to the order of four directions:east, west, south and north. The contents of each element are the lowest in the northern part, and the southern part is relatively high. Differences in chemical elements may have some impact on the growth of vegetation in each region.(4) The relationship between habitats and vegetative distribution. According to PCA analysis, Agriophyllum squarrosum, Artemisia desterorum, Corispermum Patelliforme and oxytropis falcatat have a greater contribution rate in vegetative community. In the habitat factor, electrical conductivity, R-a-potassium content, R-a-phosphorus content and Alkali-hydrolyzale-nitrogen content have a greater contribution rate. It can be seen from the results of CCA ordination, habitat has a significant effect on the distribution patterns of vegetation, and the impact of altitude is higher than precipitation. Distribution patterns of plant community can reflect the environmental gradients and quadrat type.(5) The impact of climate on vegetative distribution. Trend Analysis of the annual average temperature and the annual average precipitation in Badain Jaran Desert and results of Mann-Kendall test show that temperature has a significant mutation to rise and intensify evaporation in recent 53 years. The annual precipitation has increased overall, but does not reach the level of mutation. And increases of precipitation occur mainly in the northern margin of the desert. The increases of temperature are more obvious in the southern margin of the desert, but precipitation significantly reduces. These changes are very bad for the development of desert vegetation which relies on water as the leading factor. It may exacerbate the desertification in the southern margin of the desert.(6) The types of vegetative resource. There are various vegetative resources in the margin of Badain Jaran Desert. The plant which constitutes vegetative resources can be classified into four types:edible or feeding vegetation (22 kinds), medicinal vegetation (12 kinds), ecological vegetation (17 kinds) and other resources.(7) Development and use of vegetative resources. Development and use of vegetative resources must be set up on basis of protection. The article proposes some methods such as habitat protection migrating species protection, richness protection and biodiversity conservation. Recommend to use effects of habitat preference, regulation of water resources, reasonable grazing and proper fencing, reasonable excavation of medical vegetation and utilization of various resources as measures. Guided by the principles of sustainable development, for the purpose of building an ecological civilization, realize resource utilization and ecological protection combined with each other, environmental benefits and social benefits cooperated with each other, and protection and exploitation developed together.