植物在CH_4产生、氧化和排放中的作用  

Effect of plants on methane production, oxidation and emission

作　　者：丁维新[1] 蔡祖聪[1] 

机构地区：[1]中国科学院南京土壤研究所,南京210008

出　　处：《应用生态学报》2003年第8期1379-1384,共6页Chinese Journal of Applied Ecology

基　　金：中国科学院知识创新工程重要方向项目(KZCX2 30 2 );国家重点基础研究发展规划资助项目(G19990 1180 5)

摘　　要：综合评述了植物对CH4 产生、内源CH4 氧化和CH4 排放的影响 .不同植物释放根系分泌物能力的不同是造成CH4 产生量差异的主要原因 ,而植物不同生育期分泌分泌物能力的差异是造成季节性变化的关键 .植物泌O2 能力的高低和季节性变化通过影响内源CH4 的氧化来改变CH4 的排放数量 .植物间通气组织数量和密度的差异及其随生育期的变化 ,通过影响对CH4 的传输能力来改变CH4 的排放量 .因此 ,植物排放CH4 的通量及其季节性变化规律是由植物根系分泌分泌物能力、分泌O2 能力和传输CH4The paper reviewed the role of plants in the processes of methane production, oxidation and emission in soils. It was the abilities of different plants to excrete the quantity and quality of root exudates that resulted in discrepancies of methane production among plants and in plant growing seasons. The oxygen magnitude of the downward transport through the plant aerenechyma, which, in turn, also acted as a conduit for methane from the soil to the atmosphere, affected endogenous methane oxidation capacity with plants and with plant growing seasons. Plant through changing amount and density of plant aerenchyma altered its ability to transport methane from soil to atmosphere. In addition to soil properties, flux and pattern of methane emission from soils largely depended on plant abilities to excrete exudates and oxygen, and transport methane in different plant growing seasons.

关 键 词：植物 分泌物 CH4产生 CH4氧化 CH4排放 

分 类 号：X173[环境科学与工程—环境科学]