Natural recovery ability of the initial vegetation stage of earthquake landslide in the middle reaches of Bai Longjiang——A case study in Qingshuigou earthquake landslide of Wudu District, Longnan City, Gansu Province

On the basis of field quadrat survey, a study was conducted on plant community composition and species diversity by the detailed investigation and statistical analysis in Qingshuigou earthquake landslide of Wudu District, Longnan City, Gansu Province. The results showed that: 1) There were 26 dominant species of herbs which occupied by 76.5% of the natural recovery vegetation in the study area, and there were 8 species of shrubs and no arbor species distribution, and herbs and small shrub plants were dominant in community composition, and the dominant species were Cynodon dactylon, Digitaria sanguinalli, Heteropogon contortus, Phragmites australis, Peganum harmala, etc. 2) There were different in the composition of community species, community types and community structure of plants among various sites due to environmental factors; 3) It was especially different in the environmental factors of the hydrothermal and illumination combination at different sites, which caused the natural restoration ability of plant community exist obvious difference. It was that middle slope position>down slope position>up slope position in the sequences of natural restoration ability and antiinterference ability index.