Burning of tropical brazilian rainforest of sandy soil: does it affect soil organic matter?

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dc.contributorMaurifran Oliveira Lima, Universidade Federal do Rio Grande do Sul
dc.contributorDeborah P. Dick, Universidade Federal do Rio Grande do Sul
dc.contributorFALBERNI DE SOUZA COSTA, CPAF-AC
dc.contributorJanaína B. da Costa, Universidade Federal do Rio Grande do Sul
dc.contributorLarissa Zacher Lara, Universidade Federal do Rio Grande do Sul
dc.contributorMaria do Carmo Peralba, Universidade Federal do Rio Grande do Sul.
dc.creatorLIMA, M. O.
dc.creatorDICK, D. P.
dc.creatorCOSTA, F. de S.
dc.creatorCOSTA, J. B. da
dc.creatorLARA, L. Z.
dc.creatorPERALBA, M. do C.
dc.date2016-11-07T11:11:11Z
dc.date2016-11-07T11:11:11Z
dc.date2016-11-07
dc.date2016
dc.date2016-11-07T11:11:11Z
dc.date.accessioned2026-06-30T22:50:05Z
dc.descriptionThis study aimed to investigate the impact of vegetation burning on the content and chemical composition of soil organic matter (SOM) along a profile of a sandy Acrisol in Southwestern Amazon, Brazil, within 3 years after experiment beginning(YAB).The study was performed in Rio Branco, Acre State, and the forest burning was performed under controlled conditions. Samples from 6 depth(0-100cm depth)were collected under burned forest (BF) and primary forest (PF) at 1 YAB and 3 YAB. Besides Cand N contents, humic substances and biomarkers were determined. Under PF, the C content decreased with depth from 12 to 2 g kg-1.C/N ratio ranged from 7.6 at the surface to values around 3 at 1 m depth, indicating a predominance of microbial products. Humin fraction was not detected in the whole profile. Burning of vegetation promoted an increase of C and of humic acids only at 0-5 cm. The n-alkane distribution showed a shift towards smaller chains in the 0-5 cm of BF, indicating main contribution of microbial products. Also PAH?s of high molecular weight were detected in this site. Vegetation burning imparts alterations on the SOM composition, but these tend to disappear within 3 years.
dc.format2 p.
dc.identifierIn: INTERNATIONAL CONFERENCE OF INTERNATIONAL HUMIC SUBSTANCES SOCIETY, 18., 2016, Kanazawa. Keystone for future Earth: Natural Organic Matter (NOM) in diverse environments: proceedings... Kanazawa: IHSS, 2016.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1055947
dc.identifier.urihttp://hdl.handle.net/123456789/369137
dc.languageeng
dc.rightsopenAccess
dc.subjectQueimada controlada
dc.subjectRio Branco (AC)
dc.subjectAcre
dc.subjectAmazônia Ocidental
dc.subjectComposição Química
dc.subjectFloresta Tropical
dc.subjectMatéria Orgânica
dc.subjectSolo Arenoso
dc.titleBurning of tropical brazilian rainforest of sandy soil: does it affect soil organic matter?
dc.typeResumo em anais e proceedings

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