The Gnarrenburger Moor project is a collaboration of the institutes micromet group and the peatland team. To install a subsurface irrigation system at one of the two sites, grassland renewal was conducted. Very weak regrowth of the grass, fertilisation, low pH-values and, finally, rising peat water levels due to subsurface irrigation cause record-breaking levels of nitrous oxide emissions (and of nitrate in the pore water). CO2 emissions, however, were slightly lower than at the reference site, which ist deeply drained and also used as intensive grassland.
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