Studied on CH4 fluxes characters on coastal salt marsh of Spartina alterniflora

The potential influence of CH₄ on the global environment has been paid high attention on. Spartina alterniflora, as an adventitious species, has come into being more than 100km² costal salt mash in Jiangsu province, and which can also affect the atmosphere balance of CH₄. In this study, CH₄ fluxes were measured seasonally using static flux chambers (from October 2005 to July 2006), along a gradient section keeping away from the sea wall in Jiangsu province. In addition, the weather conditions and the soil character were measured in the same time. And then, it was analyzed that the variation characters of the CH₄ fluxes with the change of time and space and its influence factor of weather and soil character. At last, the paper draw the conclusions that there are two peak value of the CH₄ fluxes daily; and the highest flux appear on summer day, the lowest flux on spring day; and there are high correlation value between the fluxes of the CH₄ and the soil humidity in all the weather conditions and all the soil factors character. All the conclusions show that the factors influenced the fluxes of CH₄ are very complicated.