Effect of Different Grazing Patterns on Vegetation Characteristics of Meadow Steppe

Effects of different grazing patterns on plant community characteristics were investigated in Hulunbeier meadow steppe,five treatments,i.e.SA1(heavy grazing in summer,moderate grazing in autumn),SA2(heavy grazing in summer and autumn),SA3(moderate grazing in summer,heavy grazing in autumn),SA4(moderate grazing in summer and autumn) and SA5(no grazing).The results indicated that the density,height and coverage of most plants in SA3 grazing paddocks were significantly higher than other grazing paddocks;Margalef richness and Shannon-wiener index in SA3 and SA5 grazing paddocks were higher than other grazing paddocks;Simpson and Pielou index of grazing paddocks were not significantly different.The total standing crop of SA1 and SA3 grazing paddocks were higher than the others under grazing paddocks;The vegetative features was relatively well in SA3 paddocks under the different treatment by seasonal grazing control.