综述了影响湿地甲烷产生的电子受体最新研究进展,结果表明:①电子受体对甲烷产生的控制作用主要表现在电子受体还原菌与甲烷产生菌间底物的竞争以及提高甲烷产生环境的氧化还原电位;②3种电子受体间竞争电子供体的能力为硝酸盐〉三价铁〉硫酸盐,而相应作用下氢的阈值则与之相反,电子受体间除竞争机制还有彼此间的相互联系;③温度、电子供体、氧化还原电位和pH值是湿地土壤中电子受体还原过程的主要环境影响因子。
This paper reviews on the electron acceptors of controlling the methane production in wetlands, including controlling effect, reducing capacities, electron balance, etc. The influence of electron acceptors on methane production was represented in substrates competition between reducing bacteria and methanogens or improving redox potentials. The capacities of nitrate, ferric and sulfate of competition on electron donors were nitrate ferric 〉 sulfate, however, under the effect of electron acceptors, the hydrogen threshold values were opposite, for electron acceptors, not only competition but also relation. Temperature, electron donors, redox potentials and pH values were the most important factors controlling electron aeceptors reducing process.