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Nutrient losses from an intensively managed peat soil in the western part of The Netherlands Christy van Beek, Gé van den Eertwegh, Frank van Schaik, Henk van Hardeveld, Gerard Velthof Oene Oenema Nutrient losses in peat soils - background Nutrient losses in peat soils - introduction Nutrient leaching from peat soil – the Vlietpolder Nutrient losses from peat soil – Experiments Nutrient losses from peat soil – N dynamics Nutrient leaching from peat soil N concentrations in soil solution Contribution of different sources to N loading of surface water (%) Nutrient losses from peat soil – N dynamics Nutrient loss pathways Nutrient loss pathways N loss pathways - concept Nutrient losses from peat soil - conclusions Jong-SKB Is het niet eens tijd voor verjonging van uw netwerk? Wanneer vond uw laatste samenwerking met een jongere plaats? Wat is het beste advies dat u van een jongere heeft gekregen? Hoeveel jongeren zijn betrokken in uw meest recente SKB-project? Wat vertelt u over vandaag aan uw jongere collega’s? Hoeveel jongere collega’s heeft u vandaag meegenomen? Water Framework Directive ? reduce N and P loads to surface water How can we reduce N and P loads to surface water? What is the origin of N and P in surface water? How can we control the various sources of N and P in surface water? To understand effects of measures to reduce N and P loading of surface water, we need to understand the entire N and P cycle. Research approach in the Vlietpolder Contribution of agriculture to N leaching of surface water Dynamics of N losses in peat soils Comparison of N dynamics in peat soils with mineral soils Conclusions Polder Inlaat Gemaal Bedrijfsgebouwen Percelen Overschot Depositie Boezem Bedrijf Mineralisatie Uitspoeling Grondwater Atmosfeer denitrificatie denitrificatie 0-10 10-20 20-50 150 50-150 Proportional approach but…. Negative Cl budget Ca. 1.5 m Rainwater lens Presence of (very) high concentrations of N, P and Cl just below the ditch ?/? 3-4 Inlet wa
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