Lea Staal



Greenhouse gas emission from sustainably intensified cropping systems producing biomass for bio-refining

Due to high greenhouse gas emissions (GHG) and global warming future demands for sustainable biomass will increase as an alternative to fossil fuels. Concurrently, the expanding global population and increased prosperity calls for more feed and food.


One way to cope with this dual demand is to increase biomass production on existing agricultural land using new high-yielding crops or cropping systems. In a long-term field experiment we are proving that in some cases it is possible to double biomass yield compared to traditional crop production for feed and food. However, such high yields may also require large input of nitrogen fertilizer, and this will result in large N2O emissions if calculated from the current IPCC emission factors. The aim of the PhD study is to assess actual annual N2O emissions from some of the intensified cropping systems and to investigate how potential high fluxes can be minimised. Measurement techniques include static and automated chambers, N2O isotope analyser, and laboratory gas chromatograph. Soil and crop physiological measurements are needed for modelling and upscaling of campaign data.

ID: 110266359