Registro Completo
|
Biblioteca(s): |
Embrapa Amazônia Oriental. |
|
Data corrente: |
14/08/2017 |
|
Data da última atualização: |
22/12/2021 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 1 |
|
Autoria: |
COMTE, I.; LUCOTTE, M.; DAVIDSON, R.; CARVALHO, C. J. R. de; OLIVEIRA, F. de A.; ROUSSEAU, G. X. |
|
Afiliação: |
Irina Comte, Université du Québec à Montréal; Marc Lucotte, Université du Québec à Montréal; Robert Davidson, Biodôme de Montréal / Université du Québec à Montréal; CLAUDIO JOSE REIS DE CARVALHO, CPATU; Francisco de Assis Oliveira, UFRA; Guillaume X. Rousseau, PÓS-GRADUANDO UEMA. |
|
Título: |
Impacts of land uses on mercury retention in long-time cultivated soils, Brazilian Amazon. |
|
Ano de publicação: |
2013 |
|
Fonte/Imprenta: |
Water, Air, & Soil Pollution, v. 224, n. 4, April 2013. |
|
DOI: |
10.1007/s11270-013-1515-3 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Many studies have shown the relationship between fire clearing and mercury contamination of aquatic ecosystems in the Brazilian Amazon. This study aimed at quantifying mercury content in long-time cultivated soils and at assessing the potential of a fire-free alternative clearing technique on mercury retention for long-time cultivated soils compared to traditional slash-and-burn. This case study included five land uses: one crop plot and one pasture plot cleared using slash-and-burn, one crop plot and one pasture plot cleared using chop-and-mulch, and one 40-year-old forest as a control. Low mercury concentrations were recorded in the surface horizon (24.83 to 49.48 ng g−1, 0?5 cm depth). The long-time cultivation (repeated burnings) of these soils triggered large mercury losses in the surface horizon, highlighted by high enrichment factors from surface to deeper horizons. The predominant effect of repeated burnings before the experimental implementation did not let us to distinguish a positive effect of the chop-and-mulch clearing method on soil mercury retention for crops and pastures. Moreover, some processes related to the presence of the mulch may favor mercury retention (Hg volatilization decrease, cationic sites increase), while others may contribute to mercury losses (cationic competition and dislocation, mobilization by the dissolved organic matter). |
|
Palavras-Chave: |
Corte e queima. |
|
Thesagro: |
Mercúrio; Solo. |
|
Thesaurus NAL: |
Amazonia. |
|
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
Marc: |
LEADER 02087naa a2200241 a 4500
001 2074001
005 2021-12-22
008 2013 bl uuuu u00u1 u #d
024 7 $a10.1007/s11270-013-1515-3$2DOI
100 1 $aCOMTE, I.
245 $aImpacts of land uses on mercury retention in long-time cultivated soils, Brazilian Amazon.$h[electronic resource]
260 $c2013
520 $aMany studies have shown the relationship between fire clearing and mercury contamination of aquatic ecosystems in the Brazilian Amazon. This study aimed at quantifying mercury content in long-time cultivated soils and at assessing the potential of a fire-free alternative clearing technique on mercury retention for long-time cultivated soils compared to traditional slash-and-burn. This case study included five land uses: one crop plot and one pasture plot cleared using slash-and-burn, one crop plot and one pasture plot cleared using chop-and-mulch, and one 40-year-old forest as a control. Low mercury concentrations were recorded in the surface horizon (24.83 to 49.48 ng g−1, 0?5 cm depth). The long-time cultivation (repeated burnings) of these soils triggered large mercury losses in the surface horizon, highlighted by high enrichment factors from surface to deeper horizons. The predominant effect of repeated burnings before the experimental implementation did not let us to distinguish a positive effect of the chop-and-mulch clearing method on soil mercury retention for crops and pastures. Moreover, some processes related to the presence of the mulch may favor mercury retention (Hg volatilization decrease, cationic sites increase), while others may contribute to mercury losses (cationic competition and dislocation, mobilization by the dissolved organic matter).
650 $aAmazonia
650 $aMercúrio
650 $aSolo
653 $aCorte e queima
700 1 $aLUCOTTE, M.
700 1 $aDAVIDSON, R.
700 1 $aCARVALHO, C. J. R. de
700 1 $aOLIVEIRA, F. de A.
700 1 $aROUSSEAU, G. X.
773 $tWater, Air, & Soil Pollution$gv. 224, n. 4, April 2013.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
