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Type: Journal article
Title: An investigation into the reactions of biochar in soil
Author: Joseph, S.
Camps-Arbestain, M.
Lin, Y.
Munroe, P.
Chia, C.
Hook, J.
Van Zwieten, L.
Kimber, S.
Cowie, A.
Singh, B.
Lehmann, J.
Foidl, N.
Smernik, R.
Amonette, J.
Citation: Australian Journal of Soil Research, 2010; 48(6-7 Sp Iss):501-515
Publisher: C S I R O Publishing
Issue Date: 2010
ISSN: 0004-9573
Statement of
S. D. Joseph, M. Camps-Arbestain, Y. Lin, P. Munroe, C. H. Chia, J. Hook, L. van Zwieten, S. Kimber, A. Cowie, B. P. Singh, J. Lehmann, N. Foidl, R. J. Smernik and J. E. Amonette
Abstract: Interactions between biochar, soil, microbes, and plant roots may occur within a short period of time after application to the soil. The extent, rates, and implications of these interactions, however, are far from understood. This review describes the properties of biochars and suggests possible reactions that may occur after the addition of biochars to soil. These include dissolution–precipitation, adsorption–desorption, acid–base, and redox reactions. Attention is given to reactions occurring within pores, and to interactions with roots, microorganisms, and soil fauna. Examination of biochars (from chicken litter, greenwaste, and paper mill sludges) weathered for 1 and 2 years in an Australian Ferrosol provides evidence for some of the mechanisms described in this review and offers an insight to reactions at a molecular scale. These interactions are biochar- and site-specific. Therefore, suitable experimental trials—combining biochar types and different pedoclimatic conditions—are needed to determine the extent to which these reactions influence the potential of biochar as a soil amendment and tool for carbon sequestration.
Keywords: surface charge, pyrolysis, redox, soil amendment, soil carbon, carbon sequestration, soil organic matter, biochar-soil mineral.
Rights: © CSIRO 2010
RMID: 0020100948
DOI: 10.1071/SR10009
Appears in Collections:Agriculture, Food and Wine publications

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