Multi-year GHG flux measurements from grasslands on boreal mineral and drained organic soils

Managed grasslands are valuable from the viewpoint of the various ecosystem services they provide. They not only provide nutritious feed for the dairy cows and benefit a fertile soil but are also considered to have the potential to play a key role in greenhouse gas mitigation, particularly in terms of carbon sequestration. While grasslands on mineral soils vary anywhere from being a small sink to a source of GHGs, drained organic soils used for agriculture are a huge source of GHG emissions with net positive feedback to climate change. Continuous, year-round GHG flux measurements are therefore, necessary to assess the sustainability of dairy and beef sector under different agroclimatic conditions and soil types. These continuous fluxes represent all management practices such as fertilizer application, biomass harvesting, water table manipulation on organic soils and tillage operations and prevailing climatic conditions. We aim to present eddy covariance measured complete GHG balance of legume and nonlegume grasslands on mineral and drained organic soils under boreal conditions.