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Improved Phosphorus Recycling in Organic Farming: Navigating Between Constraints

Möller, Kurt; Oberson, Astrid; Bünemann, Else K.; Cooper, Julia; Friedel, Jürgen K.; Glaesner, Nadia; Hörtenhuber, Stefan; Løes, Anne-Kristin; Mäder, Paul; Meyer, Gregor; Müller, Torsten; Symanczik, Sarah; Weissengruber, Lina; Wollmann, Iris and Magid, Jakob (2018) Improved Phosphorus Recycling in Organic Farming: Navigating Between Constraints. In: Sparks, Donald (Ed.) Advances in Agronomy. 1 edition. Elsevier, Inc., chapter 4, pp. 159-237.

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Online at: https://www.elsevier.com/books/advances-in-agronomy/sparks/978-0-12-815283-6

Summary

Phosphorus (P) is an essential element for all living organisms. At the current rate of extraction, global reserves of mineable deposits will be exhausted within the next few centuries. This publication aims to summarize the current knowledge on P recycling for organic farming. The evaluation of recycled P fertilizers (RPFs) includes (i) a chemical characterization, (ii) assessment of their plant P availability and added effects in the soil, (iii) life cycle assessments, (iv) a risk assessment of their long-term impacts on soil pollution, and (v) the compilation of other environmental impacts of different treatment approaches to produce RPFs.
The highest nutrient recovery rates for P are achieved by rather simple process approaches of P recycling, while more sophisticated approaches often result in lower P recovery rates (e.g., chemical approaches for P precipitation), lower plant P availability in the final product (e.g., most thermal approaches), and losses of organic matter and nutrients like nitrogen and sulfur (e.g., thermal approaches). The plant P availability of many RPFs is higher than that of phosphate rock. Each P recycling approach has strengths and weaknesses. We conclude that any decision not to use a potential recycled P source or to introduce sophisticated treatments may have consequences compromising the ability of future generations to meet their needs. Nevertheless, we need to minimize risks for current and future generations caused by contamination linked to fertilization. Therefore, any management of nutrient recycling requires navigation between constraints. The challenge for the organic agriculture sector is to assess RPFs using a balanced approach that compromises neither the principle of ecology nor the principle of care.


EPrint Type:Book chapter
Keywords:Recycled phosphorus fertilizers, BiosolidsUrban organic wastes, Meat and bone meal, P fertilizer effectiveness, Risk assessment, Potentially toxic elements, Organic pollutants, Life cycle assessment, Core Organic II, IMPROVE-P, FiBL1007601
Subjects: Crop husbandry > Composting and manuring
Soil > Nutrient turnover
Research affiliation: European Union > CORE Organic II > IMPROVE-P
Austria > Univ. BOKU Wien
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil Sciences
Austria > FiBL Austria
Switzerland > ETHZ - Agrarwissenschaften
Denmark > KU - University of Copenhagen
Norway > NORSØK - Norwegian Centre for Organic Agriculture
UK > Univ. Newcastle
Germany > University of Hohenheim
ISSN:0065-2113
ISBN:eBook: 9780128152843, Hardcover: 9780128152836
DOI:https://doi.org/10.1016/bs.agron.2017.10.004
Related Links:http://www.coreorganic2.org/improve-p, http://www.fibl.org/de/projektdatenbank/projektitem/project/625.html
Deposited By: Mäder, Paul
ID Code:32661
Deposited On:15 Feb 2018 11:34
Last Modified:27 Feb 2019 14:00
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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