Effects of Grazing and Fencing on Soil Enzyme Activity and Soil Physicochemical Properties in Stipa Steppe in Hulunbeier,Inner Mongolia
Effects of grazing and fencing on soil enzyme activity and physicochemical properties were studied in Stipa baicalensis meadow steppe, Stipa grandis typical steppe, and Stipa krylovii typical steppe in Hulunbeier.The results showed that there were significant differences in soil physicochemical properties inside and outside fence.Under grazing pressure, the soil bulk density and pH value increased markedly, but the content of soil water and soil organic matter decreased significantly, total soil nitrogen content and total phosphorus content were also decreased significantly in S.grandis steppe and S.krylovii steppe.Activity of soil alkaline phosphatase and invertase were higher in the grazing plots than that in the fencing plots, the soil urease and catalase activity varied with different vegetation types.It also showed that there was a significant correlation between soil enzyme activity and soil main fertility factors(organic matter content, total nitrogen, available phosphorus), and it could be the indicators of the condition of grassland degradation and restoration.
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NSTL
万方数据
维普
