Assessment of CO2 and CH4 greenhouse gasses emission from rice and wheat cultivation soils in Ab-Teymor area

The global temperature has increased over the past years, and international community attempt to reduce greenhouse emissions to the atmosphere. In this study the potential of some agriculture sections for emission and absorption of CO2 and CH4 was examined. Rice and wheat which are two strategic crops in Iran were selected for this purpose and the amounts of organic carbon loss in the form of carbon dioxide and methane from two fields under this crops in Ab-Teymor area in south of Ahvaz were measured. Static chamber method was used to collect gas samples and gas chromatography technique was used to analysis the samples. Results show that rice field produced methane with the mean of 2.22 (mg C m-2 day-1), because of continuous anaerobic conditions in soil and so increased the anaerobic bacteria activity that produced methane. While wheat field absorbed atmospheric methane with the mean of 0.11 (mg C m-2 day-1), because of aerobic soil conditions and methane oxidant bacteria activity that consumed the atmospheric methane. Carbon dioxide emission from both fields increased after the November and there was a good correlation between CO2 emission with plant presence in the field, decomposition of organic residuals and environment temperature