dc.creator | LIANG, Biqing | |
dc.creator | LEHMANN, Johannes | |
dc.creator | SOHI, Saran P. | |
dc.creator | THIES, Janice E. | |
dc.creator | O`NEILL, Brendan | |
dc.creator | TRUJILLO, Lucerina | |
dc.creator | GAUNT, John | |
dc.creator | SOLOMON, Dawit | |
dc.creator | GROSSMAN, Julie | |
dc.creator | Neves, Eduardo Goes | |
dc.creator | LUIZAO, Flavio J. | |
dc.date.accessioned | 2012-10-20T14:32:20Z | |
dc.date.accessioned | 2018-07-04T15:53:33Z | |
dc.date.available | 2012-10-20T14:32:20Z | |
dc.date.available | 2018-07-04T15:53:33Z | |
dc.date.created | 2012-10-20T14:32:20Z | |
dc.date.issued | 2010 | |
dc.identifier | ORGANIC GEOCHEMISTRY, v.41, n.2, p.206-213, 2010 | |
dc.identifier | 0146-6380 | |
dc.identifier | http://producao.usp.br/handle/BDPI/32210 | |
dc.identifier | 10.1016/j.orggeochem.2009.09.007 | |
dc.identifier | http://dx.doi.org/10.1016/j.orggeochem.2009.09.007 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1628839 | |
dc.description.abstract | Black carbon (BC) is an important fraction of many soils worldwide and plays an important role in global C biogeochemistry. However, few studies have examined how it influences the mineralization of added organic matter (AOM) and its incorporation into soil physical fractions and whether BC decomposition is increased by AOM. BC-rich Anthrosols and BC-poor adjacent soils from the Central Amazon (Brazil) were incubated for 532 days either with or without addition of (13)C-isotopically different plant residue. Total C mineralization from the BC-rich Anthrosols with AOM was 25.5% (P < 0.05) lower than with mineralization from the BC-poor adjacent soils. The AOM contributed to a significantly (P < 0.05) higher proportion to the total C mineralized in the BC-rich Anthrosols (91-92%) than the BC-poor adjacent soils (69-80%). The AOM was incorporated more rapidly in BC-rich than BC-poor soils from the separated free light fraction through the intra-aggregate light fraction into the stable organo-mineral fraction and up to 340% more AOM was found in the organo-mineral fraction. This more rapid stabilization was observed despite a significantly (P < 0.05) lower metabolic quotient for BC-rich Anthrosols. The microbial biomass (MB) was up to 125% greater (P < 0.05) in BC-rich Anthrosols than BC-poor adjacent soils. To account for increased MB adsorption onto BC during fumigation extraction, a correction factor was developed via addition of a (13)C-enriched microbial culture. The recovery was found to be 21-41 % lower (P < 0.05) for BC-rich than BC-poor soils due to re-adsorption of MB onto BC. Mineralization of native soil C was enhanced to a significantly greater degree in BC-poor adjacent soils compared to BC-rich Anthrosols as a result of AOM. No positive priming by way of cometabolism due to AOM could be found for aged BC in the soils. (C) 2009 Elsevier Ltd. All rights reserved. | |
dc.language | eng | |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | |
dc.relation | Organic Geochemistry | |
dc.rights | Copyright PERGAMON-ELSEVIER SCIENCE LTD | |
dc.rights | restrictedAccess | |
dc.title | Black carbon affects the cycling of non-black carbon in soil | |
dc.type | Artículos de revistas | |