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Preliminary Study on Succession of Artemisia ordosica Community in Gonghe Sandy Grassland

This paper describes the role of Artemisia ordosica in the successional processes of drifting and fixed sand-dune vegetation and its interaction with the process of desertification in the Gong He sandy grassland.An autogenic successional pathway in vegetation of this region can be described which is associated with change from drifting to stable sand dunes and back:this sere proceeds from bare-sand dunes to A.sphaerocephala on semi-drift-sand dunes,then through A.ordosica +A.sphaerocephala on semi-fixed-sand dunes,and A.ordosica on fiexed sand dunes,to a A.ordosica+Stipa breviflora community on fixed-sand.The semi-shrub of A.ordosica tolerates the burying of sands,wind erosion,a dry climate and nutrient poor soil.It is a good fodder plant and is the most important plant in fixing sand dunes in the area.The communities it dominates play a very important role in both protecting the soil against wind erosion and in agriculture and livestock husbandry.To maintain the stability of A.ordosica communities and to protect the sand dunes from desertification,moderate grazing on fixed sand dunes is proposed as a management tool to arrest vegetation succession.