Open AccessJournal Article
Fate of soil applied black carbon: downward migration, leaching and soil respiration [Approved article]
TLDR
In this paper, the authors investigated the fate of BC applied to a savanna Oxisol in Colombia at rates of 0, 11.6, 23.2 and 116.1 t BC ha -1, as well as its effect on non-BC soil organic C.Abstract:
Black carbon (BC) is an important pool of the global C cycle, because it cycles much more slowly than others and may even be managed for C sequestration. Using stable isotope techniques, we investigated the fate of BC applied to a savanna Oxisol in Colombia at rates of 0, 11.6, 23.2 and 116.1 t BC ha -1 , as well as its effect on non-BC soil organic C. During the rainy seasons of 2005 and 2006, soil respiration was measured using soda lime traps, particulate and dissolved organic C (POC and DOC) moving by saturated flow was sampled continuously at 0.15 and 0.3 m, and soil was sampled to 2.0 m. Black C was found below the application depth of 0-0.1 m in the 0.15-0.3 m depth interval, with migration rates of 52.4 ± 14.5, 51.8 ± 18.5 and 378.7 ± 196.9 kg C ha -1 yr -1 (± SE) where 11.6, 23.2 and 116.1 t BC ha -1 , respectively, had been applied. Over 2 years after application, 2.2% of BC applied at 23.2 t BCha -1 was lost by respiration, and an even smaller fraction of 1% was mobilized by percolating water. Carbon from BC moved to a greater extent as DOC than POC. The largest flux of BC from the field (20-53% of applied BC) was not accounted for by our measurements and is assumed to have occurred by surface runoff during intense rain events. Black C caused a 189% increase in aboveground biomass production measured 5 months after application (2.4-4.5 additional dry biomass ha -1 where BC was applied), and this resulted in greater amounts of non-BC being respired, leached and found in soil for the duration of the experiment. These increases can be quantitatively explained by estimates of greater belowground net primary productivity with BC addition.read more
Citations
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Persistence of soil organic matter as an ecosystem property
Michael W. I. Schmidt,Margaret S. Torn,Margaret S. Torn,Samuel Abiven,Thorsten Dittmar,Thorsten Dittmar,Georg Guggenberger,Ivan A. Janssens,Markus Kleber,Ingrid Kögel-Knabner,Johannes Lehmann,David A. C. Manning,Paolo Nannipieri,Daniel P. Rasse,Steve Weiner,Susan E. Trumbore +15 more
TL;DR: In this article, a new generation of experiments and soil carbon models were proposed to predict the SOM response to global warming, and they showed that molecular structure alone alone does not control SOM stability.
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Biochar effects on soil biota – A review
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TL;DR: A review of the literature reveals a significant number of early studies on biochar-type materials as soil amendments either for managing pathogens, as inoculant carriers or for manipulative experiments to sorb signaling compounds or toxins as mentioned in this paper.
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Hydrothermal carbonization of biomass residuals: a comparative review of the chemistry, processes and applications of wet and dry pyrolysis
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References
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Journal ArticleDOI
Characteristics of hemicellulose, cellulose and lignin pyrolysis
TL;DR: In this article, the pyrolysis characteristics of three main components (hemicellulose, cellulose and lignin) of biomass were investigated using, respectively, a thermogravimetric analyzer (TGA) with differential scanning calorimetry (DSC) detector and a pack bed.
Journal ArticleDOI
Mehlich 3 soil test extractant: A modification of Mehlich 2 extractant
TL;DR: The Mehlich 3 (M3) extractant as discussed by the authors is composed of 0.2N CH3COOH, 0.25N NH4N03•0.015NNH4F, 0,013NHN03−0.001M EDTA.
Journal ArticleDOI
Persistence of soil organic matter as an ecosystem property
Michael W. I. Schmidt,Margaret S. Torn,Margaret S. Torn,Samuel Abiven,Thorsten Dittmar,Thorsten Dittmar,Georg Guggenberger,Ivan A. Janssens,Markus Kleber,Ingrid Kögel-Knabner,Johannes Lehmann,David A. C. Manning,Paolo Nannipieri,Daniel P. Rasse,Steve Weiner,Susan E. Trumbore +15 more
TL;DR: In this article, a new generation of experiments and soil carbon models were proposed to predict the SOM response to global warming, and they showed that molecular structure alone alone does not control SOM stability.
Journal ArticleDOI
Biochar effects on soil biota – A review
Johannes Lehmann,Matthias C. Rillig,Janice E. Thies,Caroline A. Masiello,William C. Hockaday,David E. Crowley +5 more
TL;DR: A review of the literature reveals a significant number of early studies on biochar-type materials as soil amendments either for managing pathogens, as inoculant carriers or for manipulative experiments to sorb signaling compounds or toxins as mentioned in this paper.