淹水稻田甲烷产生和排放的研究现状

Production and Emission of Methane Frorn Flooded paddy Rice Fields

大气中温室气体如ＣＯ＿２、ＣＨ＿４和Ｎ＿２Ｏ等增加，导致全球气候变暖。ＣＨ＿４虽浓度相对较低，但其捕获热量的效率却比ＣＯ＿２高２０─３０倍，并以每年１％的速度增加。本文阐述了淹水稻田ＣＨ＿４排放过程及数量，稻田土壤类型、栽培措施对ＣＨ＿４产生与排放的影响，ＣＨ＿４排放与水稻生长关系。同时讨论了控制和缓解稻田ＣＨ＿４排放的途径。

Abstract108The incrcasc of “greenhouse”gas in the atmosphere such as CO_2,CH_4andN_2O etc.results in the warming of global climate.All though the concent-ration of ch_4 is relatively low,a single CH_4 molecule traps heat 20-30times more than a CO_2 molecule.In addition,the annual increase rate of the CH_4 1%. The Process and amount of CH_4 emission from floodedpaddy field,the effects of soil types and cultivation practices on the produc-tion and emission of CH_4 and relation between the emission of CH_4 andrice growth were diseussed. The approaches for control of the CH_4 emissionemision from rice field were also described.