沼泽湿地N_2O通量特征及N_2O与CO_2排放间的关系  

Characteristics of N_2O flux and the relationship between N_2O and CO_2 emission in the marsh wetland

作　　者：孙丽[1] 宋长春 黄耀[2] 

机构地区：[1]中国科学院东北地理与农业生态研究所 [2]中国科学院大气物理研究所,北京100029

出　　处：《中国环境科学》2006年第5期532-536,共5页China Environmental Science

基　　金：国家自然科学基金资助项目(40471124;40431001);中国科学院知识创新工程重大项目(KZCX1-SW-01)

摘　　要：对三江平原淡水沼泽湿地进行了连续4年的野外原位观测．结果表明，沼泽湿地冬季是N2O的汇，但从全年来看，仍为N2O排放的源．5～8月是N2O排放的主要时期．土壤温度是影响N2O通量季节变化的重要环境因素，生长季内的积水水位和土壤温度则会影响到N2O通量的年际变化；沼泽湿地N2O与CO2排放间相关性显著，促使二者间产生这种内在联系的因素包括：温度、植物根系的作用、有机质分解的联系作用以及植物气孔行为的调节。Through 4 years continuous field original place observation in the freshwater marsh wetland of Sanjiang Plain, the results showd that marsh wetland was N2O source in winter; but from the view of while year, it was still the source of N2O emission. The main period of N2O emission was from May to August. Soil temperature was the important environmental factor affecting the seasonal variation of N2O flux. Water level and soil temperature during the growing season would affect the interannual variation of N2O flux. The correlation between N2O and CO2 emission in marsh wetland was marked, and the factors that led to the internal relation including temperature, plant roots, correlation action of decomposition of organic matter and the adjustment of stomatal behavior of plant.

关 键 词：淡水沼泽湿地 N2O通量 环境因素 CO2排放 

分 类 号：X511[环境科学与工程—环境工程]