Journal
SOIL BIOLOGY & BIOCHEMISTRY
Volume 48, Issue -, Pages 47-50Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2012.01.013
Keywords
Black carbon; Charcoal; Decomposition; DON; Soil organic matter
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Funding
- Australian Grains Research and Development Corporation (GRDC)
- Welsh European Funding Office under SEREN
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Biochar additions to soil have been reported to enhance soil fertility whilst simultaneously storing carbon (C). We tested whether either fresh or field-conditioned (aged) biochar amendment to two contrasting agricultural soils would alter the mineralisation of organic N compounds. The mineralisation of C-14-labelled amino acids and peptides were determined over 20 days within each soil. An exponential kinetic decay model was subsequently fitted to the mineralisation data. Overall, statistical analysis revealed significant but small differences between the two biochar treatments and the unamended control treatment. We conclude that biochar has very limited impact on the mineralisation rate of low molecular weight dissolved organic N compounds in these agro-ecosystems. (C) 2012 Elsevier Ltd. All rights reserved.
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