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Registro Completo |
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
07/11/2016 |
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Data da última atualização: |
16/11/2023 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
LIMA, M. O.; DICK, D. P.; COSTA, F. de S.; COSTA, J. B. da; LARA, L. Z.; PERALBA, M. do C. |
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Afiliação: |
Maurifran Oliveira Lima, Universidade Federal do Rio Grande do Sul; Deborah P. Dick, Universidade Federal do Rio Grande do Sul; FALBERNI DE SOUZA COSTA, CPAF-Acre; Janaína B. da Costa, Universidade Federal do Rio Grande do Sul; Larissa Zacher Lara, Universidade Federal do Rio Grande do Sul; Maria do Carmo Peralba, Universidade Federal do Rio Grande do Sul. |
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Título: |
Burning of tropical brazilian rainforest of sandy soil: does it affect soil organic matter? |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: 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. |
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Páginas: |
2 p. |
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Idioma: |
Inglês |
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Conteúdo: |
This 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. |
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Palavras-Chave: |
Acre; Amazônia Ocidental; Queimada controlada; Rio Branco (AC). |
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Thesagro: |
Composição Química; Floresta Tropical; Matéria Orgânica; Solo Arenoso. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/149628/1/26192.pdf
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Marc: |
LEADER 02150nam a2200277 a 4500
001 2055947
005 2023-11-16
008 2016 bl uuuu u00u1 u #d
100 1 $aLIMA, M. O.
245 $aBurning of tropical brazilian rainforest of sandy soil$bdoes it affect soil organic matter?$h[electronic resource]
260 $aIn: INTERNATIONAL CONFERENCE OF INTERNATIONAL HUMIC SUBSTANCES SOCIETY, 18., 2016, Kanazawa. Keystone for future Earth: Natural Organic Matter (NOM) in diverse environments: proceedings... Kanazawa: IHSS$c2016
300 $a2 p.
520 $aThis 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.
650 $aComposição Química
650 $aFloresta Tropical
650 $aMatéria Orgânica
650 $aSolo Arenoso
653 $aAcre
653 $aAmazônia Ocidental
653 $aQueimada controlada
653 $aRio Branco (AC)
700 1 $aDICK, D. P.
700 1 $aCOSTA, F. de S.
700 1 $aCOSTA, J. B. da
700 1 $aLARA, L. Z.
700 1 $aPERALBA, M. do C.
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Registro original: |
Embrapa Acre (CPAF-AC) |
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| Registros recuperados : 1 | |
| 1. |  | LIMA, M. O.; DICK, D. P.; COSTA, F. de S.; COSTA, J. B. da; LARA, L. Z.; PERALBA, M. do C. Burning of tropical brazilian rainforest of sandy soil: does it affect soil organic matter? In: 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. 2 p.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Acre. |
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