USING THE DNDC BIO GEO CHEMICAL TO CALCULATE GREENHOUSE GAS EMISSIONS FROM WET RICE CULTIVATION ACTIVITIES IN THINH LONG TOWN, HAI HAU DISTRICT, NAM DINH PROVINCE

Abstract

The study used the DNDC (Denitrification - Decomposition) model to calculate the amount of CH₄ and N₂O generated from rice cultivation activities of people in Thinh Long town, Hai Hau district, Nam Dinh province. The DNDC model was calibrated with actual field measurements and gave high reliability. When using the DNDC model to calculate GHG emissions in wet rice farming in Thinh Long town, the research obtained the following results: (1) The CH₄ and N₂O emissions over the years in urban areas of Thinh Long town has a difference. Specifically, the amount of emissions increased gradually during the period of 2015 - 2017. (2) The amount of CH₄ emissions in 2017 in Thinh Long town was 781 kg/ha/crop for the summer crop and it was 534 kg/ha/crop for the spring crop. (3) The amount of N₂O emissions in 2017 in Thinh Long town was 1 kg/ha/crop for summer crop and was 0.8 kg/ha/crop for the spring crop.