Organic coating on biochar explains its nutrient retention and stimulation of soil fertility
| Autor: | Silvia Orsetti, Hans-Peter Schmidt, Martin Obst, Claudia Kammann, Alba Dieguez-Alonso, Claudia Mayrhofer, Stephen Joseph, Sebastian Behrens, Nikolas Hagemann, Johannes Harter, Sarasadat Taherymoosavi, K. Wade Elliott, Krisztina Varga, Edisson Subdiaga, Pellegrino Conte, Thomas Borch, Mihaela Albu, Amy M. McKenna, Robert B. Young, Andreas Kappler |
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| Přispěvatelé: | Hagemann, Nikola, Joseph, Stephen, Schmidt, Hans-Peter, Kammann, Claudia I., Harter, Johanne, Borch, Thoma, 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 |
| Rok vydání: | 2017 |
| Předmět: |
Science
Settore AGR/13 - Chimica Agraria General Physics and Astronomy Biomass 010501 environmental sciences Carbon sequestration engineering.material complex mixtures 01 natural sciences Article General Biochemistry Genetics and Molecular Biology Physics and Astronomy (all) Nutrient Coating Soil retrogression and degradation Biochar Organic matter lcsh:Science 0105 earth and related environmental sciences 2. Zero hunger chemistry.chemical_classification Biochemistry Genetics and Molecular Biology (all) Multidisciplinary Chemistry (all) fungi 04 agricultural and veterinary sciences General Chemistry 15. Life on land chemistry Agronomy 13. Climate action Environmental chemistry 040103 agronomy & agriculture engineering 0401 agriculture forestry and fisheries lcsh:Q Soil fertility |
| Zdroj: | Nature Communications, Vol 8, Iss 1, Pp 1-11 (2017) Nature Communications |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/s41467-017-01123-0 |
| Popis: | 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, electrochemical 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. Biochar promotes plant growth via a slow release of nutrients; however, a mechanistic understanding of nutrient storage in biochar is lacking. Here, using high-resolution spectromicroscopy and mass spectrometry, the authors identify an organic coating on co-composted particles that enhances nutrient retention. |
| Databáze: | OpenAIRE |
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