Characteristic analysis of Sphagnum palustre bog in Dajiuhu, Mt. Shennongjia

On the basis of the on-the-spot investigation, this paper describes the vegetation composition, community characteristics and development tendency of Sphagnum palustre bog situated at a basin of Dajiuhu in Shennongjia, Hubei. The investigation results show:(1) the Sphagnum palustre bog has herb layer in which Juncus canciuns is the dominant species and moss layer in which Sphagnum palustre is the key species. Comparing to the investigation result in 1980s, the bog has more plant species and more nutrition-rich plant and the area of the bog decreases and Polytrichum commune hills appeared in the bog. The bog is degenerating from nutrition-poor bog to nutrition-medium bog or nutrition-rich bog.