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| Løes, Anne-Kristin; Eikås, Sondre. |
| Organic farming systems with restricted access to animal manure often experience decline in soil P concentrations. Nutrients should be cycled in society to maintain the long-term fertility of agricultural soil. One option for this may be precipitation of struvite (magnesium-ammonium phosphate) from sewage treatment plants, to be Applied as fertiliser. Struvite produced in a Norwegian sewage plant (Hias IKS)significantly increased yield levels and soil P concentrations, when applied in one season (2018) in a long-term experiment comparing two levels of manure application at Tingvoll research farm, NW Norway. Struvite has been proposed by the Expert Group EGTOP to be included in Annex 1, listing permitted fertiliser inputs in organic farming. However, a... |
| Tipo: Newspaper or magazine article |
Palavras-chave: Nutrient turnover; Farm nutrient management. |
| Ano: 2019 |
URL: http://orgprints.org/36768/1/Nationen%20kronikk%202019%20Ta_fosforet_tilbake.pdf |
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| Rittl, Tatiana; Krogstad, Tore; Eikås, Sondre; Saltnes, Torgeir; Sørensen, Gjermund; Glestad, Hans Emil; Løes, Anne-Kristin. |
| The soil P concentration commonly declines over time by organic management, if the farm does not acquire enough fertilisers or other inputs containing P from outside. An interesting source to supply farms with P is struvite (magnesium‐ammonium phosphate). This mineral easily precipitates when the concentrations of these nutrients is high enough, such as in a toilet separating urine. Struvite may be produced in a wastewater treatment plant, as a method to reduce the P concentration in the water reaching the recipient. If struvite is allowed as a mineral fertiliser in the general fertiliser regulation of the European Union,which is currently under revision, this mineral may be allowed also in certified organic agriculture. A wastewater treatment plant in... |
| Tipo: Report |
Palavras-chave: Recycling; Balancing and resource management Nutrient turnover. |
| Ano: 2019 |
URL: http://orgprints.org/36472/1/NORS%C3%98K%20RAPPORT%2010%20struvitt%20FINAL%20Sept%205%202019%20trykk.pdf |
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