中文摘要：

采用静态箱——气相色谱法对崇明岛稻麦轮作生态系统主要温室气体CO2、CH4和N2O排放进行了田间原位观测,并分析了影响温室气体排放的主要因素.结果表明,崇明岛稻麦轮作生态系统中,CH4和N2O的显著排放仅出现在水稻生长季,且透明箱与暗箱测得通量季节变化趋势具有高度一致性;水稻田是CH4和N2O的排放源,是CO2的吸收汇;冬小麦生长季农田表现为CH4的吸收汇,是CO2和N2O的排放源.整个稻麦轮作周期内,CH4、N2O以及暗箱CO2（即呼吸排放CO2）通量与各温度因子呈现出显著或极显著正相关性;CH4通量与土壤含水率、土壤C/N比值均存在极显著正相关性.另外,稻田CH4通量与土壤有机质（SOM）含量之间存在极显著正相关性,与土壤NH＋4-N含量呈显著正相关关系;而稻田N2O通量与NO-3-N含量存在极显著正相关关系.

英文摘要：

This paper used static chamber technique to investigate the emission and consumption of CO2 , CH4 and N2 O in rice-wheat rotation system, in Chongming Island. Based on one year data, the following conclusions were drawn： On the whole, rice field was the emission source of CH4 and N2 O, and the sink of CO2 . Wheat field was the sink of CH4 , and the emission source of CO2 . In rice-wheat rotation field period, the correlation between CH4 , N2 O, CO2 respiration emission flux （ opaque chamber ） and the temperature was significant or extremely significant; Extremely significant positive correlation between annual CH4 flux variation, soil moisture content, and C/N value was found. In rice field period, there was the significant positive correlation between CH4 flux and SOM（ Soil organic matter） content, NH4^＋-N content;the significant positive correlation between N2 O flux and NO3^--N content also was found.