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Phosphordüngewirkung karbonisierter Biogasgärreste

Leong, KI; Lohr, D.; von Tucher, Sabine and Meinken, E. (2017) Phosphordüngewirkung karbonisierter Biogasgärreste. Poster at: 14. Wissenschaftstagung Ökologischer Landbau, Campus Weihenstephan, Freising-Weihenstephan, 7. -10. März 2017.

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Summary

P-recycling from biogas residue may play a future key role for sustainable P supply in organic farming. However, in particular transportation costs of residue need to be
reduced e.g. by pretreatment. One approach is carbonization by pyrolysis or hydrothermal carbonization (HTC). In a pot trial with maize on a P-deficient, acidic sandy loam P uptake after application of two chars from pyrolysis (400 and 700 °C) and HTC (6 and 8 h dwell time) all made of the same residue was compared to P uptake after application of the raw residue and water soluble KH2PO4 respectively. P
uptake was the same for KH2PO4, raw residue and both HTC treatments, but was significant lower in treatments with pyrolytic chars. Neither dwell time nor temperature
had an effect. However, whereas pyrolysis raised P concentration, in HTC chars it was the same as in the raw residue. Also P was extracted from soil of pots without plants at beginning, half and end of the trial using H2O, CAT, CAL and Na-formate respectively. For CAT, CAL and Na-formate significant correlations between P uptake
by maize and extractable P at all dates exist, whereas for H2O this was only true for extractable P at the end of the trial.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Keywords:Biogas, karbonisierte Biogasgärreste, Phosphor, P-recycling
Agrovoc keywords:
LanguageValueURI
EnglishpyrolysisUNSPECIFIED
EnglishTCRUNSPECIFIED
Englishhydrothermal carbonizationUNSPECIFIED
EnglishHTCUNSPECIFIED
EnglishP-recyclingUNSPECIFIED
Subjects: Soil > Soil quality
Crop husbandry > Composting and manuring
Soil > Nutrient turnover
Research affiliation: Germany > University of Applied Science Weihenstephan
Germany > University of Munich - TUM
International Conferences > 2017: Scientific Conference German Speaking Countries > Soil fertility
ISBN:978-3.89574-925-4
Deposited By: Hasreiter, Anna
ID Code:31557
Deposited On:15 Jul 2017 07:58
Last Modified:15 Jul 2017 07:58
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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