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Abschätzung des Risikos einer Schwermetall-Akkumulation in Böden durch längerfristige Anwendung von Recycling- Phosphor-Düngemitteln

Weissengruber, Lina; Friedel, Jürgen K. and Möller, Kurt (2017) Abschätzung des Risikos einer Schwermetall-Akkumulation in Böden durch längerfristige Anwendung von Recycling- Phosphor-Düngemitteln. Paper at: 14. Wissenschaftstagung Ökologischer Landbau, Campus Weihenstephan, Freising-Weihenstephan, 07.-10. März 2017.

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Summary

In order to assess the risk of the use of recycled phosphorus (P) fertilisers for organic farming, the potential accumulation of heavy metals in soil after a 200-year fertilizer application equivalent to 11 kg P ha-1 yr-1 was calculated in a mass balance approach. Both fertilizers currently allowed in organic farming and recycled P fertilizers were regarded. For heavy metals, four scenarios with two soil pH levels (pH 5 and pH 7) and two precipitation excess levels (F 0.1 and F 0.3 m yr-1) were calculated. Recycled P fertilizers like struvite, meat- and bone meal, ashes, sewage sludge and digestate, as well as phosphate rock and triple superphosphate had a higher P content and a lower heavy metal-to-P ratio than composts. Consequently, compost application was associated with the highest pollution risk. Only the Cd accumulation with TSP was higher than that with compost. Model calculations do not indicate a significant risk of heavy metal accumulation in soil compromising food quality or soil fertility after longterm application for the assessed recycled P fertilizers.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:heavy metals, phosphorus recycling, sewage sludge, phosphorus fertilizer, risk assessment
Subjects: Soil > Soil quality
Crop husbandry > Composting and manuring
Soil > Nutrient turnover
Research affiliation: Austria > Univ. BOKU Wien
Germany > University of Hohenheim > Institute of Crop Science
International Conferences > 2017: Scientific Conference German Speaking Countries > Soil fertility
ISBN:978-3-89574-925-4
Deposited By: Hasreiter, Anna
ID Code:31898
Deposited On:04 Jul 2017 17:21
Last Modified:04 Jul 2017 17:21
Document Language:German/Deutsch
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:Dieser Beitrag ist im Tagungsband der 14. Wissenschaftstagung erschienen.
S. Wolfrum, H. Heuwinkel, H.J. Reents, u.a. (Hrsg.) (2017): Ökologischen Landbau weiterdenken - Verantwortung übernehmen - Vertrauen stärken. Beiträge der 14. Wissenschaftstagung Ökologischer Landbau, Freising-Weihenstephan, 7.-10. März 2017
Verlag Dr. Köster, Berlin

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