The Relationship Between Plant Community Characteristics and Soil Organic Matter Content of Sedentary Grazing Pastures in a Typical Steppe

摘要

In order to discuss the relationship between the characteristics of plant communities and the content of topsoil organic matter under the condition of two-season sedentary grazing,authors of this paper selected a Stipa krylovii steppe for research and studied the plant community characteristics and the topsoil organic matter content.The results showed that in the sedentary grazing area,the perennial plant species decreased,the annual plant species increased,and the topsoil organic matter content decreased.There were a negative correlation between plant biomass and topsoil organic matter content,and a positive correlation between total coverage and topsoil organic matter content.The change of plant community characteristics in the sedentary grazing area was related to the implementation of the system of transferring the pasture use rights to the herdsmen and controlled grazing.