Effects of grazing systems on the growth of Stipa breviflora community

It is demonstrated that the grazing systems have an effect on the growth of Stipa breviflora community．The grazing systems have a great effect on plant growth rate，and the plants grow more rapidly under a rotational grazing and forbidden grazing area than that under a continuous grazing area ．while they have no significant effects to the number of tillers under an individual plant．Plant population density is relatively steady．Plant carbohydrate content is higher under a rotational grazing area than that under a continuous grazing and forbidden grazing area in general，and the plant growth potential is the best on rotationa1 grazing area．