Post-Harvest N2O Emissions Can Be Mitigated With Organic Amendments

After the harvest of winter oilseed rape and faba bean crops, considerable high soil nitrate values may be built up before in central to north European regions. High precipitation a low N uptake by subsequent crop fall cause risk 2 O emissions leaching. Microbial decomposition residues or carbon amendments immobilize mineral temporarily prevent losses direct emissions. Five treatments, including residue removal application different organic after harvest, were tested field trial Northern Germany elucidate potential this mechanism as mitigation option. nitrogen status monitored from August March for three consecutive years. Observed ranged 0.1 3.4 kg ha −1 180 days. An empirical model approach was applied separate impact spatially temporally heterogeneous environmental conditions between plots experiment treatment effects statistical analysis Results show that exchange initial with C:N ratios (i.e., wheat straw sawdust) can reduce emission during 45%.