This paper presents the results of the parameter sensitivity assessment of the DNDC (Denitrification - Decomposition: Decomposition - Denitrification) model when calculating N2O greenhouse gas emissions from maize cultivation. The research results show that water Conductivity, moisture saturation, ammonium concentration, nitrate concentration and soil salinity index are not affected
radiation quantity, wind regime, microbial activity index, porosity, rainwater collection index and lightning rate have little influence
the amount of fertilizer, temperature, rainfall, humidity, mechanical composition, soil C content, pH, field moisture, and topsoil density have the most influence. Research and select trial sites at Maize Research Institute, Dan Phuong, Hanoi, maize variety LVN17 to be planted in winter, on alluvial soil of the Red River. From the research results, the manager may propose measures to reduce N2O gas from the corn - growing process.