The Influence of Grazing Intensity on Community Characteristics and Diversity of Deyeuxia angustifolia Meadow in Sanjiang Plain

The influence of grazing intensity on community characteristics and diversities of Deyeuxia angustifolia meadow in Sanjiang Plain was studied.No grazing,light grazing,moderate grazing and heavy grazing were set in the experiment.The results showed that plant species in the community were increased by grazing,and most of them were Gramineae,Compositae,Rosaceae and Polygonaceae.The species diversity and stability of the community were the best under moderate grazing intensity.The important value of perennial plants was reduced by grazing and important value of annual plants was increased a little.The density of Deyeuxia angustifolia,Sonchus brachyotus were all decreased under different grazing intensity,and dandelion was increased.