The SOMMIT Project: SUstainable Management of soil Organic Matter to MItigate Trade-offs between C sequestration and nitrous oxide, methane and nitrate losses

摘要: Within the context of climate change there is increasing focus on the implementation of agricultural practices which contribute to soil C sequestration (Cseq) to mitigate rising atmospheric CO2 levels. The agricultural sector is, however, also the largest global contributor to anthropogenic non-CO2 GHGs. N2O and CH4 emissions contribute substantially to the Earth's radiative forcing and even small impacts on their fluxes could hamper climate change mitigation efforts. While it is known that Soil Management Strategies (SMS) aimed at increasing Cseq in agricultural soils also affect soil N2O and CH4 fluxes and N losses through leaching, data and knowledge are still fragmented. Thus, a Europe-wide policy approach to the resulting trade-offs is urgently needed, given the high global warming potential of N2O. Mitigation effects of agricultural practices enhancing Cseq can largely be offset if N2O emissions increase but …