The effect of biological oxygen demand of cattle slurry and soil moisture on nitrous oxide emissions

摘要: The application of animal manure slurries to soils may cause high short-term emissions nitrous oxide (N2O). We performed studies on N2O varying the contents NH4-N and microbial available organic carbon (measured as biological oxygen demand, BOD) cattle slurry. Additionally effect slurry BOD at different soil water (35, 54, 71% filled pore space, WFPS) was studied. Slurries from an anaerobic digestion plant (digested slurry, BOD: 1.2 g O2 l−1) or untreated (BOD: 6.8 were applied 30 m3 ha−1 incubated 20°C. higher WFPS more emitted independent type applied. At low medium contents, digested induced significantly lower than directly correlated with content (R 2=0.61, P≤0.001). also compared concentration 54% WFPS. Again had a significant influence but reduction no amount emitted. microbially seems determine shortly after application.