The Influence of Grazing Intensity on Exchanging Fluxes of Nitrous Oxide, Methane and Carbon Dioxide from Grassland

Grassland ecosystem is the main part of terrestrial ecosystem. The variations of greenhouse gas (N2O, CH4 and CO2) exchanging fluxes from grassland can influence global greenhouse gases payments balance. And the main land use pattern of grassland is grazing. The grazing impacts on the exchanging fluxes of N2O, CH4 and CO2 from soil of grassland by influencing soil physical properties (such as soil moisture, temperature and porosity) of grassland. This paper analyzed the results of previous studies by the way of comparison, and we summarised that the grazing reduced CH4 uptake and N2O emissions of grassland, but which does not change the sources and sinks pattern of atmospheric greenhouse gases. However, the grazing significantly increased the emissions of CO2 from grassland.