草业学报Issue(6)：204-212,9.DOI:10.11686/cyxb2014313
氮输入对土壤甲烷产生、氧化和传输过程的影响及其机制
Effects of nitrogen input on CH4 production,oxidation and transport in soils,and mechanisms:a review
摘要
Abstract
Methane is an important component of carbon output in anaerobic soil.Minor changes to the soil car-bon cycle will cause significant changes in the metabolic processes involving methane,which in turn can be markedly affected by exogenous nitrogen input.With increase in anthropogenic nitrogen inputs,exogenous ni-trogen becomes an important factor in soil methane production,oxidation,and transmission processes.Meth-ane emissions are regulated by nitrogen availability.Nitrogen inputs can change the background environmentand methane emission mechanisms in soil,and consequently influence methane emission fluxes.Research into effects of nitrogen input on CH4 production and the mechanisms of N effects on oxidation and transport proces-ses in soils are reviewed in this paper.The important findings in the literature are:1)The effects of nitrogen input on CH4 fluxes in soils can be positive,negative or neutral,due to the range of effects of added N on methane production,oxidation,and transport processes;2)The effects of nitrogen input on methane produc-tion processes are controlled by methanogenic substrates and methanogenic microbial activities.Nitrogen input provides rich substrates for methane production by increasing soil organic carbon content.The changes in the physical and chemical properties of substrates and vegetation cover make this effect complicated.Nitrogen in-put can also either promote or inhibit the activity of methanogens,depending on the form of nitrogen supplied;3)The effects of nitrogen input on methane oxidation processes mainly arise from stimulation or inhibition of the activities of methanotrophs;4)The effects of nitrogen input on methane transport processes depend mostly on the number of aerenchyma vessels and on transport efficiencies,and the degree of dependence varied greatly in different ecosystems.Overall,the effects of nitrogen input on soil CH4 production,oxidation,and transport process are complicated and the mechanisms are uncertain.Future research should focus on the effects of nitro-gen input on the critical processes determining methane emissions,on investigation of the effects of nitrogen in-put on microbial community structures,abundance and activities,and on collaborative research in a range of e-cosystems.The goal of future research should be to determine the contribution of various ecosystems to global methane emissions at specific levels of nitrogen input.关键词
机制/甲烷产生/甲烷氧化/微生物/氮输入Key words
mechanisms/methane production/methane oxidation/microorganism/nitrogen input引用本文复制引用
胡敏杰,仝川,邹芳芳..氮输入对土壤甲烷产生、氧化和传输过程的影响及其机制[J].草业学报,2015,(6):204-212,9.基金项目
国家自然科学基金项目（41071148），福建省教育厅项目（JA13469），福建师范大学创新团队项目和福建师范大学地理科学学院研究生创新基金项目资助。 （）
