Effect of Different Improved Measures on Vegetation and Soil Fertility of Saline-alkali Grassland

In this study,the three measures all improved the grassland habitat,increased the soil fast-acting nutrient and forage grass proportion in the grass group.The fertilizing measure had a significant improved effect on leguminosae and composite forage grass,which proportions in the grass group were increased by 39.9%～19.8% and 27.5%～34.4% respectively than the control farm plot,but the gramineae forage grass proportion reduced by 21.3%～15.3%,the yield of edible forage grass increased by 22.0%～57.8%.The fencing measure made the leguminosae and composite forage grass proportion increased by 26.7%～13.4% and 4.7%～9.0% respectively,the yield of edible forage grass increased by 13.1%～78.0%.The Shallow Ploughing measure made the leguminosae and composite forage grass proportion increased by 27.3%～17.7% and 23.2%～36.3% respectively,but the gramineae forage grass proportion reduced by 12.1%～10.1%,the yield of edible forage grass increased by-28.5%～28.6%.It was clear that the mearures of fertilizing and fencing were effective ways to improve grassland.