N2O Emissions in the Cultivation of Energy Crops

Abstract

The N2O-emissions from sites with three nitrogen fertilisation levels have been measured through gas chromatography since 1999. The long-term mean nitrogen conversion factor is 0.7 %. Few sporadic but intensive N2O emission spots are the reason for a fertilisation dependent conversion factor. Whereas the correlation coefficient between N2O emissions and annual precipitation is high, there is much lower correlation between soil nitrate and N2O emissions. N2O emissions result from nitrogen fertilisation, crops and precipitation.