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Plant uptake of phosphorus and nitrogen recycled from synthetic source-separated urine

Bonvin, Christophe ; Etter, Bastian ; Udert, Kai ; Frossard, Emmanuel ; Nanzer, Simone ; Tamburini, Federica ; Oberson, Astrid

In: AMBIO, 2015, vol. 44, p. 217-227

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    Titre
    • Plant uptake of phosphorus and nitrogen recycled from synthetic source-separated urine
    Auteur
    • Bonvin, Christophe. Group of Plant Nutrition, Research Station Eschikon, Institute of Agricultural Sciences, ETH Zurich, Eschikon 33, 8315, Lindau, Switzerland
    • Etter, Bastian. Eawag, Swiss Federal Institute of Aquatic Science and Technology (PSI), 8600, Dübendorf, Switzerland
    • Udert, Kai. Eawag, Swiss Federal Institute of Aquatic Science and Technology (PSI), 8600, Dübendorf, Switzerland
    • Frossard, Emmanuel. Group of Plant Nutrition, Research Station Eschikon, Institute of Agricultural Sciences, ETH Zurich, Eschikon 33, 8315, Lindau, Switzerland
    • Nanzer, Simone. Paul Scherrer Institut, 5232, Villigen, Switzerland
    • Tamburini, Federica. Group of Plant Nutrition, Research Station Eschikon, Institute of Agricultural Sciences, ETH Zurich, Eschikon 33, 8315, Lindau, Switzerland
    • Oberson, Astrid. Group of Plant Nutrition, Research Station Eschikon, Institute of Agricultural Sciences, ETH Zurich, Eschikon 33, 8315, Lindau, Switzerland
    Type de document
    • Postprint
    Identifiant OAI-PMH
    • oai:doc.rero.ch:331724
    Summary
    Urine contains about 50% of the phosphorus (P) and about 90% of the nitrogen (N) excreted by humans and is therefore an interesting substrate for nutrient recovery. Source-separated urine can be used to precipitate struvite or, through a newly developed technology, nitrified urine fertilizer (NUF). In this study, we prepared 33P radioisotope- and stable 15N isotope-labeled synthetic NUF (SNUF) and struvite using synthetic urine and determined P and N uptake by greenhouse-grown ryegrass (Lolium multiflorum var. Gemini) fertilized with these products. The P and N in the urine-based fertilizers were as readily plant-available in a slightly acidic soil as the P and N in reference mineral fertilizers. The ryegrass crop recovered 26% of P applied with both urine-based fertilizers and 72 and 75% of N applied as struvite and SNUF, respectively. Thus, NUF and urine-derived struvite are valuable N and P recycling fertilizers.