Informatie voor professionals in voedsel en groen

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Record nummer 2236152
Titel Food related land requirement and phosphorus balance of The Netherlands : appendix of report Closing the life cycle of phosphorus in an urban food system: the case Almere (NL) (report WPR-725)
toon extra info.
J.G. Conijn & W. van Dijk
Auteur(s) Conijn, J.G. ; Dijk, W. van
Uitgever Lelystad : Wageningen Plant Research, Business Unit Applied Arable and Vegetable Research
Jaar van uitgave 2018
Pagina's 1 online resource (PDF, 18 pages) illustrations
Titel van reeks Report / WPR (757)
Annotatie(s) KB-31-001-006
Online full text
Publicatie type Boek
Taal Engels
Toelichting (Engels) Recently, two studies were done that focussed on global and urban phosphorus (P) flows in the foodchain and land demand for food production: 1) a study aimed at exploring the possibilities of a localfood system and its effect on the phosphorus cycle for the urban region Almere and 2) a study inwhich the state of the global food system in 2010 was modelled with respect to land use, GHGemission, nitrogen and phosphorus cycling using the model BIOSPACS (Balancing Inputs and Outputsfor the Sustainable Production of Agricultural CommoditieS).In a separate study both models have now been applied to the Netherlands while focussing onphosphorus flows and land demand for the situation in which the Netherlands produces its own food(i.e. self-sufficient, except for exotic food products). In this report the assumptions and the results ofthe two new studies for the Netherlands are compared. We refer to these new studies by, respectively,Almere_NLD and BIOSPACS.Basis of the calculations for both approaches is the food intake and food supply (including foodwastage) to households. From that point the area demand for food production and associated P flowsare calculated based on crop and animal production data.For BIOSPACS the food intake and food supply data are derived from FAOSTAT (originating from CBS)and for Almere_NLD the food intake is based on data from the Dutch national food consumptionsurvey and, subsequently, food supply to households is calculated by assuming a wastage of 20%.Generally, in the analysis with BIOSPACS higher food supply rates are used for feeding the Dutchpopulation and more P needs to be ‘provided’, relative to Almere_NLD (average values for food: +27%and for P: +23%).Except for cereals and oil crops, the assumed crop yields used in Almere_NLD are higher than thosederived from BIOSPACS, especially for potatoes (+21%), pulses (+19%) and fruits (+59%). For theanimal production the feed requirement per unit animal product (FRR, feed requirement ratio)together with the crop yields determine the area and phosphorus demand. The FRR-values for pigmeat, poultry meat and egg production are comparable. For bovine meat and milk production theFRR-values calibrated in BIOSPACS are lower by using less roughages and concentrates.Despite different assumptions and data sources, the overall results are more or less comparable forthe two studies. This applies to the required area for agricultural production as well as the main Pflows. However, considerable differences in crop area demand between individual crops are calculated,and explained by differences in input values. BIOSPACS calculates a higher area demand for foodcrops while Almere-NLD calculates a higher area demand for animal production, resulting in a totalagricultural area demand that is comparable for the two studies. For a self-sufficient situation moreagricultural land would be needed compared to the amount currently in use for food production in theNetherlands. P flows in waste and P flows entering and leaving the city (households, retail, food processingindustry) were quite similar for both approaches. In agriculture larger differences are found due todifferent assumptions in the studies of BIOSPACS and Almere_NLD. In the latter most waste flowshave been assumed to be recycled towards agriculture, which has not been done for BIOSPACS.Furthermore, Almere_NLD assumes no P losses nor any accumulation of P in agricultural soils (crop Pdemand equals crop P offtake), contrary to the situation in BIOSPACS. However, when these twoconditions were also assumed for BIOSPACS, the required amounts of P fertiliser were more or lesscomparable
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