Evaluation of some soil properties in agricultural lands of Semnan province and its effect on greenhouse gas emissions trends (Case study: Bastam region))

In recent years, the increased of greenhouse gases due to agricultural activities has been significant. The purpose of this study is to investigate the extent of carbon dioxide and methane emissions in agricultural lands of Semnan province and Bastam region, including: apricots, grapes, wheat, barley, corn, forage and pastures.

For this purpose, soil samples were taken from a depth of 0-30 cm. Soil properties including salinity, pH, percentage of sand, silt and clay, organic matter, total nitrogen, phosphorus, potassium and calcium carbonate were measured. Closed static chambers were used for gas sampling and in each cultivated and used product, 3 to 5 points and total of 31 points were selected. Finally, the amount of greenhouse gas, global warming potential and environmental costs were calculated.

Based on the results, the highest carbon dioxide emissions were observed for fodder corn in autumn with an average of 3 g / m2 / day and the lowest emissions for pastures in autumn with an average of 0.25 g / m2 / day. For methane gas, the results showed that forage corn in the two autumn seasons had the highest gas emissions with an average of 3 g / m2 / day and the lowest emissions for pastures in autumn with an average of 1.03 g / m2 / day.