关键词: 区系地理成分, 组成, 分布型, 库姆塔格沙漠

Abstract:

The local flora structure, plant ecotype and the distribution characteristics of plant on Kumtag desert were studied based on vegetable survey and by applying the methods of botany and phytogeography. The results show that the local plant belongs to the representative desert flora and has higher similarity compared with nationwide desert plant. The single-species family, few-species family, the single-species genera and few-species genera are the main part of the local flora, and were the main source of flora complexity and species diversity as the local widely distributed species. The dominance of the few-species genera was evident. In most cases, though the bigger species family and genera as the dominant species of local plant community and the representative components are not the main part, they have an important influence to the structure of flora and vegetable composition. The geographic element of the flora was of multiplicity and the Temperate element and Mediterranean element were the main part of local flora; the temperate element characteristics were the typical features of local flora. Affected by special terrain and climatic change,the distribution of vegetation appears a different distribution patterns and non-zonal characteristics. The herbaceous plant had the numerical advantage. The shrubs as the main part of the woody plant had obviously effect on regional environmental. The analysis of floristic geographical element and distribution characteristic on Kumtag desert also indicated that the climate and environmental condition, the ecological amplitude and the adaptive capacity of the plant had the determinative influence to the floristic geography distribution.

Key words: floristic elements, structure, areal-type, Kumtag Desert