Fate of soil applied black carbon: downward migration, leaching and soil respiration
| dc.creator | Major, J. | |
| dc.creator | Lehmann, Johannes | |
| dc.creator | Rondón, Marco Antonio | |
| dc.creator | Goodale, C | |
| dc.date | 2010-04 | |
| dc.date | 2014-09-24T08:42:09Z | |
| dc.date | 2014-09-24T08:42:09Z | |
| dc.date.accessioned | 2026-06-27T14:29:46Z | |
| dc.description | 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 BC ha?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 t 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. | |
| dc.identifier | https://hdl.handle.net/10568/43456 | |
| dc.identifier.uri | http://hdl.handle.net/123456789/79893 | |
| dc.language | en | |
| dc.publisher | Wiley | |
| dc.rights | Limited Access | |
| dc.subject | leaching | |
| dc.subject | soil respiration | |
| dc.subject | lixiviacion | |
| dc.subject | respiración del suelo | |
| dc.subject | ecology | |
| dc.title | Fate of soil applied black carbon: downward migration, leaching and soil respiration | |
| dc.type | Journal Article |