نوع مقاله : مقاله پژوهشی
1 گروه اقلیم شناسی، دانشکده جغرافیا و علوم محیطی، دانشگاه حکیم سبزواری، سبزوار، ایران
2 گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه شهید چمران اهواز، اهواز، ایران
عنوان مقاله [English]
present study is an applied-analytical study aimed at using the daycent model in determining the rate of progression of methane gases, nitrous oxide and nitric oxide in the cultivated lands under Khuzestan sugar cane. At first, sampling and determination of output gas concentration in each area were performed and then simulated using the DAYCENT software of the emissions in the studied stations. In the following, the global warming potential was obtained based on the results of Daycent software. In order to investigate the performance efficiency of coefficient statistics, maximum error, mean square root, model efficiency and residual mass coefficient were used. results showed that the mean methane flux model was obtained at the Shushtar station, 160, nitrous oxide 2 and nitric oxide 4 kg ha-1, and for the Abadan station of methane flux 120, nitrous oxide 2 and nitric oxide 6 kg ha-1 per year It was determined that Shushtar station had a higher methane flux than Abadan station and the results of the oxidative and nitric oxide rates were similar in two regions. According to results of statistical indices in all three nitrous oxide gas, methane and nitric oxide, respectively, coefficient of determination (0.98, 0.99 and 0.77), root mean square error (055808, 310218/0 and 038842 / 0) and model efficiency (619002/0, 854543/0 and 767205/0), the daycent model has shown acceptable accuracy for all three gases. results of global warming potential changes at Abadan station showed that reducing rainfall reduces the potential of global warming and increasing this potential.