| Title | Biochar built soil carbon over a decade by stabilizing rhizodeposits |
| Publication Type | Journal Article |
| Year of Publication | 2017 |
| Authors | Weng Z., Van Zwieten L., Singh B.P, Tavakkoli E., Joseph S., Macdonald L.M, Rose T.J, Rose M.T, Kimber S.WL, Morris S., Cozzolino D., Araujo J.R, Archanjo B.S, Cowie A. |
| Journal | Nature Climate Change |
| Volume | 7 |
| Pagination | 371-+ |
| Date Published | May |
| Type of Article | Article |
| ISBN Number | 1758-678X |
| Accession Number | WOS:000400373500019 |
| Keywords | BLACK CARBON, climate-change, dynamics, Environmental Sciences & Ecology, food security, MATTER, Meteorology & Atmospheric Sciences, mineralization, nexafs, organic-carbon, pasture, sequestration |
| Abstract | Biochar can increase the stable C content of soil. However, studies on the longer-term role of plant-soil-biochar interactions and the consequent changes to native soil organic carbon (SOC) are lacking. Periodic (CO2)-C-13 pulse labelling of ryegrass was used to monitor belowground C allocation, SOC priming, and stabilization of root-derived C for a 15-month period-commencing 8.2 years after biochar (Eucalyptus saligna, 550 degrees C) was amended into a subtropical ferralsol. We found that field-aged biochar enhanced the belowground recovery of new root-derived C (C-13) by 20%, and facilitated negative rhizosphere priming (it slowed SOC mineralization by 5.5%, that is, 46 g CO2-C m(-2) yr(-1)). Retention of root-derived 13C in the stable organo-mineral fraction ( |
| Short Title | Nat. Clim. Chang.Nat. Clim. Chang. |
| Alternate Journal | Nat. Clim. Chang. |
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- Biochar built soil carbon over a decade by stabilizing rhizodeposits
Biochar built soil carbon over a decade by stabilizing rhizodeposits
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Weng, Zhe (Han) Van Zwieten, Lukas Singh, Bhupinder Pal Tavakkoli, Ehsan Joseph, Stephen Macdonald, Lynne M. Rose, Terry J. Rose, Michael T. Kimber, Stephen W. L. Morris, Stephen Cozzolino, Daniel Araujo, Joyce R. Archanjo, Braulio S. Cowie, Annette
Araujo, Joyce/I-4546-2013
Araujo, Joyce/0000-0002-6784-7041; Morris, Stephen/0000-0003-2551-9717
Australian Government, Department of Agriculture and Water Resources; Australian Synchrotron, Victoria, Australia [AS151_SXR_9599]
The authors thank the Australian Government, Department of Agriculture and Water Resources for supporting the National Biochar Initiatives (2009-2012, 2012-2014) which co-funded this research. We are particularly grateful to P. Slavich, as one of the key founders of this long-term field experiment, for providing insightful comments on the initial draft. Part of this research was undertaken on the soft X-ray spectroscopy beamline at the Australian Synchrotron, Victoria, Australia (grant number AS151_SXR_9599). We thank the chief beamline scientist, B. Cowie, for his technical support on the soft X-ray analysis. We also appreciate the technical support from S. Petty and J. Rust for maintaining this field experiment over the past decade, and laboratory support from N. Morris. We also thank C. Achete from INMETRO, Brazil and B. Gong from the University of New South Wales, Australia, for performing XPS analysis of biochars and soils, respectively. We acknowledge the intellectual contribution from S. Donne for discussions on the potential mechanisms of biochar-induced stabilization of rhizodeposits. We also thank Y. Fang for giving advice and reviewing 13C calculations.
26
Nature publishing group
London
1758-6798
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Van Zwieten, L (reprint author), Univ New England, Sch Environm & Rural Sci, Armidale, NSW 2351, Australia.; Van Zwieten, L (reprint author), Wollongbar Primary Ind Inst, NSW Dept Primary Ind, Wollongbar, NSW 2477, Australia.; Van Zwieten, L (reprint author), Southern Cross Univ, East Lismore, NSW 2480, Australia.
lukas.van.zwieten@dpi.nsw.gov.au
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