通过温室盆栽试验对水稻土CH4 排放的季节变化及冬作季节土地管理的影响进行了研究 .结果表明 ,冬作季节种植紫云英、淹水休闲及干燥休闲但泡水前施用稻草处理泡水后 3 0dCH4 排放量分别高达 13 3d观测期总排放量的 67.5 %、3 5 .5 %及 3 3 .3 % ,且在泡水后第 13天及水稻移栽后第 7、40、91天分别出现 4个CH4 排放高峰 ;而种植小麦和干燥休闲但冬作前施用稻草处理泡水后 5 5dCH4 排放量才占观测期总排放量的 6.74%和 0 .2 7% ,随后至水稻收获CH4 排放通量也不高 .冬作季节土地管理引起的水稻生长期土壤Eh季节变化的差异是造成CH4 排放通量季节变化差异的主要原因 The greenhouse pot experiment was conducted to study the seasonal changes of CH4 emission in paddy soil and the effects of winter management on the land management.The results showed that the use of straw to treat soaked water before flooding After 30 days, the emissions of CH4 reached 67.5%, 35.5% and 33.3% of the total emissions in the 13 days and 13th days, respectively, and after 13 days of soaking and 7th, 40th, and 91st days after rice transplanting While 4 CH4 emission peaks appeared respectively. However, the discharge of wheat and dry-but-dry but pre-winter straw was only 6.74% and 0.27% of the total discharge during the observation period, The discharge flux is not high.The difference of seasonal Eh of soil Eh during rice growing season caused by winter season is the main reason of the seasonal variation of CH4 flux