Journal article
Biochar built soil carbon over a decade by stabilizing rhizodeposits
Nature Climate Change, Vol.7, pp.371-376
2017
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Source: InCites
Abstract
<p>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 <sup>13</sup>CO2 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 (<em>Eucalyptus saligna</em>, 550 °C) was amended into a subtropical ferralsol. We found that field-aged biochar enhanced the belowground recovery of new root-derived C (<sup>13</sup>C) by 20%, and facilitated negative rhizosphere priming (it slowed SOC mineralization by 5.5%, that is, 46 g CO2-C m<sup>−2</sup> yr<sup>−1</sup>). Retention of root-derived <sup>13</sup>C in the stable organo-mineral fraction (<53 >μm) was also increased (6%, <em>P</em> < 0.05). Through synchrotron-based spectroscopic analysis of bulk soil, field-aged biochar and microaggregates (</p>
Details
- Title
- Biochar built soil carbon over a decade by stabilizing rhizodeposits
- Creators
- Zhe Weng - Charles Sturt UniversityLukas Van Zwieten - Southern Cross UniversityBhupinder P Singh - NSW Department of Primary IndustriesEhsan Tavakkoli - NSW Department of Primary IndustriesStephen Joseph - University of WollongongLynne M Macdonald - CSIRO Agriculture, South AustraliaTerry J Rose - Southern Cross UniversityMichael T Rose - NSW Department of Primary IndustriesStephen W L Kimber - NSW Department of Primary IndustriesStephen Morris - NSW Department of Primary IndustriesDaniel Cozzolino - Central Queensland UniversityJoyce R Araujo - Instituto Nacional de Metrologia, BrazilBraulio S Archanjo - Instituto Nacional de Metrologia, BrazilAnnette Cowie - NSW Department of Primary Industries
- Publication Details
- Nature Climate Change, Vol.7, pp.371-376
- Identifiers
- 1907; 991012822194602368
- Academic Unit
- Science; Faculty of Science and Engineering; Southern Cross Plant Science
- Resource Type
- Journal article