אסיף מאגר המחקר החקלאי

Microstructural and associated chemical changes during the composting of a high temperature biochar: Mechanisms for nitrate, phosphate and other nutrient retention and release

Year:

2017

Source of publication :

Authors :

Volume :

618

Co-Authors:

Joseph, S., Discipline of Chemistry, University of Newcastle, Callaghan, NSW 2308, Australia
University of New South Wales, School of Material Science and Engineering, NSW 2052, Australia, School of Materials Science and Engineering, University of NSW, Kensington, NSW 2052, Australia, Electron Microscopy Centre, Australian Institute for Advanced Materials, Innovation Campus, University of Wollongong, Squires Way, North Wollongong, NSW 2517, Australia
Kammann, C.I., Department of Soil Science and Plant Nutrition, Working Group Climate Change Research for Special Crops, University Geisenheim, Von-Lade Str. 1, D-65366 Geisenheim, Germany
Shepherd, J.G., School of GeoSciences, University of Edinburgh, Crew Building, Alexander Crum Brown Road, EH9 3BZ, Edinburgh, UK
Conte, P., Dipartimento di Scienze Agrarie, Alimentari e Forestali, Università degli Studi di Palermo, viale delle Scienze ed. 4, 90128 Palermo, Italy
Schmidt, H.-P., Ithaka Institute for Carbon Strategies, Ancienne Eglise 9, 1974 Arbaz, Switzerland
Hagemann, N., Geomicrobiology, Center for Applied Geoscience, University of Tuebingen, Sigwartstrasse 10, 72076 Tuebingen, Germany
Rich, A.M., Solid State and Elemental Analysis Unit, Mark Wainwright Analytical Centre, University of New South Wales, Kensington, NSW 2052, Australia
Marjo, C.E., Solid State and Elemental Analysis Unit, Mark Wainwright Analytical Centre, University of New South Wales, Kensington, NSW 2052, Australia
Allen, J., School of Chemical Engineering University of Newcastle, Callaghan, NSW 2308 Australia
Munroe, P., School of Materials Science and Engineering, University of NSW, Kensington, NSW 2052, Australia
Mitchell, D.R.G., Electron Microscopy Centre, Australian Institute for Advanced Materials, Innovation Campus, University of Wollongong, Squires Way, North Wollongong, NSW 2517, Australia
Donne, S., Discipline of Chemistry, University of Newcastle, Callaghan, NSW 2308, Australia
University of New South Wales, School of Material Science and Engineering, NSW 2052, Australia
Spokas, K., United States Department of Agriculture, Agricultural Research Service, Soil and Water Management Unit, 1991 Upper Buford Circle, St. Paul, MN, USA
Graber, E.R., Institute of Soil, Water and Environmental Sciences, The Volcani Center, Agricultural Research Organization, P.O.B. 15159, Rishon LeTzion 7528809, Israel

Facilitators :

Link :

Abstract:

Recent studies have demonstrated the importance of the nutrient status of biochar and soils prior to its inclusion in particular agricultural systems. Pre-treatment of nutrient-reactive biochar, where nutrients are loaded into pores and onto surfaces, gives improved yield outcomes compared to untreated biochar. In this study we have used a wide selection of spectroscopic and microscopic techniques to investigate the mechanisms of nutrient retention in a high temperature wood biochar, which had negative effects on Chenopodium quinoa above ground biomass yield when applied to the system without prior nutrient loading, but positive effects when applied after composting. We have compared non-composted biochar (BC) with composted biochar (BCC) to elucidate the differences which may have led to these results. The results of our investigation provide evidence for a complex series of reactions during composting, where dissolved nutrients are first taken up into biochar pores along a concentration gradient and through capillary action, followed by surface sorption and retention processes which block biochar pores and result in deposition of a nutrient-rich organomineral (plaque) layer. The lack of such pretreatment in the BC samples would render it reactive towards nutrients in a soil-fertilizer system, making it a competitor for, rather than provider of, nutrients for plant growth. © 2017 Elsevier B.V.

Note:

Related Files :

תוכן קשור

More details

You may also be interested in