Impact of slurry strip-till and surface slurry incorporation on NH3 and N2O emissions on different plot trials in Central Germany

In the lysimeter trial, in 2014 significantly higher N2O emissions were detected in the unfertilized control than in the fertilized treatments. In the plot trial in Kossebau, in 2015 significantly lower N2O emissions were recorded in the row than interrow. These differences are probably due to the uptake of mineral nitrogen by the plants in the row as a starting material for nitrification and denitrification. In Kossebau there were significant correlations between N2O emissions and soil temperature. As regards the slurry strip-till method, no significant reduction in N2O emissions was observed in comparison to surface slurry incorporation. The influence of the slurry strip-till method on NH3 and N2O emissions depends on annual weather conditions and it cannot generally be regarded as preferable to conventional, surface slurry incorporation.