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Organic coating on biochar explains its nutrient retention and stimulation of soil fertility

Titelangaben

Hagemann, Nikolas ; Joseph, Stephen ; Schmidt, Hans-Peter ; Kammann, Claudia ; Harter, Johannes ; Borch, Thomas ; Young, Robert B. ; Varga, Krisztina ; Taherymoosavi, Sarasadat ; Elliott, K. Wade ; McKenna, Amy ; Albu, Mihaela ; Mayrhofer, Claudia ; Obst, Martin ; Conte, Pellegrino ; Dieguez-Alonso, Alba ; Orsetti, Silvia ; Subdiaga, Edisson ; Behrens, Sebastian ; Kappler, Andreas:
Organic coating on biochar explains its nutrient retention and stimulation of soil fertility.
In: Nature Communications. Bd. 8 (2017) Heft 1 . - No. 1089.
ISSN 2041-1723
DOI: https://doi.org/10.1038/s41467-017-01123-0

Abstract

Amending soil with biochar (pyrolized biomass) is suggested as a globally applicable approach to address climate change and soil degradation by carbon sequestration, reducing soil-borne greenhouse-gas emissions and increasing soil nutrient retention. Biochar was shown to promote plant growth, especially when combined with nutrient-rich organic matter, e.g., co-composted biochar. Plant growth promotion was explained by slow release of nutrients, although a mechanistic understanding of nutrient storage in biochar is missing. Here we identify a complex, nutrient-rich organic coating on co-composted biochar that covers the outer and inner (pore) surfaces of biochar particles using high-resolution spectro (micro)scopy and mass spectrometry. Fast field cycling nuclear magnetic resonance, elec- trochemical analysis and gas adsorption demonstrated that this coating adds hydrophilicity, redox-active moieties, and additional mesoporosity, which strengthens biochar- water interactions and thus enhances nutrient retention. This implies that the functioning of biochar in soil is determined by the formation of an organic coating, rather than biochar surface oxidation, as previously suggested.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER143129
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Heisenberg-Professur Experimentelle Biogeochemie > Heisenberg-Professur Experimentelle Biogeochemie - Univ.-Prof. Dr. Martin Obst
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Heisenberg-Professur Experimentelle Biogeochemie
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
Eingestellt am: 03 Jan 2018 09:30
Letzte Änderung: 31 Jan 2018 12:56
URI: https://eref.uni-bayreuth.de/id/eprint/41112