Artificial Grass Grazing CH₄ Fluxes Characteristics Of Different Semi-Arid Region Of Region Of Inner Mongolia

In this study, the use of static chamber-gas chromatography in July 2012, July 2013 semi-arid region of Inner Mogolia anniversary artificial turf field positioning CH4 fluxes, three different experimental setups were grazing control (CK), continuous grazing (CG) and rotational grazing (RG). The results show that: Compared with the ban pasture, CG and RG grassland soil did not change the function of atmospheric CH4 sink, nor change its seasonal variations, but the impact of the grassland soil absorption intensity of atmospheric methane, grazing suppressed absorption of methane, but not significant. Average CH4 fluxes each treatment were:CK:-28.77±8.23μg C m-2 h-1, CG:-26.84 ± 8.78μg C m-2 h-1, RG:-28.18±8.56μg Cm-2 h-1was no significant difference among the three. CK, CG and RG methane season grassland soil absorption peak occurred during the spring and harmony soil humidity is relatively concentrated rainfall season. Factors affecting the seasonal variation of CH4 uptake is mainly soil moisture and soil temperature. Three kinds of grazing atmospheric methane flux and soil surface soil temperature showed a significant positive correlation. Grass methane fluxes and absorption rate of the soil pore water filling was a significant positive correlation, where CK, CG highly significant positive correlation. In the case of soil moisture greatly affect soil temperature on methane flux weakening. Factors affecting the absorption of atmospheric methane grassland soils also include ammonium, nitrate accumulation and soil dissolved organic carbon (DOC), in which the absorption of soil ammonium methane there was a significant disincentive for soil nitrate and DOC uptake had no significant effect on CH4 fluxes.