Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    We will mail you new results for this query: q=Sillebak Kristensen
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A comparison of disaggregated nitrogen budgets for Danish agriculture using Europe-wide and national approaches
Kros, Johannes ; Hutchings, Nicholas J. ; Kristensen, Inge Toft ; Kristensen, Ib Sillebak ; Børgesen, Christen Duus ; Voogd, Jan Cees ; Dalgaard, Tommy ; Vries, Wim de - \ 2018
Science of the Total Environment 643 (2018). - ISSN 0048-9697 - p. 890 - 901.
Agricultural soils - Budgets - Disaggregation - Modelling - National - Nitrogen

Spatially detailed information on agricultural nitrogen (N) budgets is relevant to identify regions where there is a need for a reduction in inputs in view of various forms of N pollution. However, at the scale of the European Union, there is a lack of consistent, reliable, high spatial resolution data necessary for the calculation of regional N losses. To gain insight in the reduction in uncertainty achieved by using higher spatial resolution input data. This was done by comparing spatially disaggregated agricultural N budgets for Denmark for the period 2000–2010, generated by two versions of the European scale model Integrator, a version using high spatial resolution national data for Denmark (Integrator-DK) and a version using available data at the EU scale (Integrator-EU). Results showed that the national N fluxes in the N budgets calculated by the two versions of the model were within 1–5% for N inputs by fertilizer and manure excretion, but inputs by N fixation and N mineralisation differed by 50–100% and N uptake also differed by ca 25%, causing a difference in N leaching and runoff of nearly 50%. Comparison with an independently derived Danish national budget appeared generally to be better with Integrator-EU results in 2000 but with Integrator-DK results in 2010. However, the spatial distribution of manure distribution and N losses from Integrator-DK were closer to observed distributions than those from Integrator-EU. We conclude that close attention to local agronomic practices is needed when using a leaching fraction approach and that for effective support of environmental policymaking, Member States need to collect or submit high spatial resolution agricultural data to Eurostat.

A comparison of disaggregated nitrogen budgets for Danish agriculture using Europe-wide and national approaches
Kros, J. ; Hutchings, Nicholas J. ; Toft Kristensen, Inge ; Sillebak Kristensen, Ib ; Borgesen, C.D. ; Voogd, J.C.H. ; Dalgaard, Tommy ; Vries, W. de - \ 2016
Spatially detailed information on nitrogen (N) budgets is relevant for the identification of regions N pollution needs to be reduced. However, the availability of consistent reliable data is generally lacking. Therefore most models applied in Europe use national or even European scale data as model input. To gain insight in the reduction in uncertainty that could be achieved by using higher resolution input data, spatially disaggregated agricultural N budgets for Denmark for the period 2000-2010 were generated by the European scale model Integrator, being fed with high spatial resolution national data for Denmark (Integrator-DK) and compared with results obtained by using the default data (Integrator-EU). Here we focus on the year 2010, for which the quality of the regional Danish input data was considered best. Results show that clear differences exists for the national budgets calculated by both versions of the model but comparison with an independently derived Danish national budget appeared to be better with Integrator-EU results. However, the spatial distribution of manure distribution and N losses from Integrator-DK are closer to the observed distributions than those from Integrator-EU
Report on adaptation and mitigation options in the showcase farms : Deliverable 10.5
Stienezen, M.W.J. ; Sillebak Kristensen, Ib ; Olesen, J.E. ; Hutchings, N. ; Mogensen, Lisbeth ; Barioni, Luis ; Veloso, Rui - \ 2015
Seventh Framework Programme (Animal Change : SEVENTH FRAMEWORK PROGRAMME : THEME 2: FOOD, AGRICULTURE AND FISHERIES, AND BIOTECHNOLOGIES Grant agreement number: FP7- 266018) - 72 p.
This deliverable collates the information on simulated effects of mitigation and adaptation options at the farm scale in the non-European study regions from AnimalChange, primarily using the FarmAC model for the mitigation options, and applying semi quantitative modelling for the adaptation options
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