Evaluation of CH4, NO and NO2 emission from agricultural lands (Case study, Khuzestan province)

The purpose of this study is estimation of CH4, N2O and NO emission from agricultural lands, including citrus, wheat, date, sugarcane and rice in Khuzestan province, Iran. The actual concentration of each gas was determined by sampling from study sites. The DAYCENT model was used to simulate corresponding values of emission from each farm in selected sites. According to results, the highest and lowest annual amount of N2O emission were obtained in wheat and sugarcane farms of Shooshtar, 0.10 t.ha-1 and 0.002 t.ha-1, respectively. Similarly, the highest and lowest amounts of NO emission were observed in citrus orchards of Dezful and Shooshtar sugarcane fields, i.e. 0.152 and 0.004 t/ha, respectively. Average CH4 emission was highest for the paddy fields of Baghmalek and lowest in Abadan sugarcane farms with 1.369 and 0.12 t.ha-1.year-1, respectively. Considering the major contribution of agriculture in emission of greenhouse gasses, further studies in other regions of the country is recommended.