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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
21/01/2015 |
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Data da última atualização: |
23/02/2015 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
FIGUEIREDO, R. de O.; BARROSO, D. F. R.; PIRES, C. S.; COSTA, F. |
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Afiliação: |
RICARDO DE OLIVEIRA FIGUEIREDO, CNPMA; DANIEL F R BARROSO; CAMILA S PIRES; FABIOLA COSTA. |
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Título: |
Hydrobiogeochemical fluxes and its relation to land use changes at small catchments in the Marapanim River Basin, Pará state, Brazil. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: International SWAT Conference, 2014, Porto de Galinhas. Book of Abstracts... Porto de Galinhas: USDA Agricultural Research Service (USDA-ARS), 2014. |
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Páginas: |
p. 138. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract; The macro region "Nordeste Paraense" in Pará state is the oldest agricultural settlement area in the Eastern Brazilian Amazon and has been the location of widespread slash-and-burn agriculture for many years. We studied the biogeochemical changes of nine small catchments (~20-140 ha drainage areas) in the Marapanim River Basin: seven agricultural catchments and two remnant forest catchments used as references for the original landscape. Smallholder agriculture (cassava, corn, cowpea, pepper and passion fruit) is the dominant type of land use in these catchments, along with several medium-sized cattle ranches. Together, these uses form a land use mosaic that also includes large areas of fallow vegetation. Primary forests are rare and frequently restricted only to riparian zones. Each month over the period of one hydrological year, we measured instantaneous discharge and dissolved anions and cations, as well as pH, electric conductivity (EC), temperature, and dissolved oxygen (DO) in stream water of each catchment. The greatest change in biogeochemistry occurred in a stream draining an area of abundant pasture and no riparian forest, including decreases in DO and nitrate and increases in ammonium, pH, and EC. The collection site for this stream also was near an area where cattle frequently entered the stream to drink water. Moreover, large biogeochemical changes were found in a stream that had a slash-and-burn agricultural system for cassava near the stream, including decreases in DO and increases in calcium, magnesium, and potassium concentrations. In this region, riparian forest conservation can be an important management tool for mitigating land use change effects on water quality, together with agricultural conservation practices that avoid the use of fire to clear land for crops and pasture. MenosAbstract; The macro region "Nordeste Paraense" in Pará state is the oldest agricultural settlement area in the Eastern Brazilian Amazon and has been the location of widespread slash-and-burn agriculture for many years. We studied the biogeochemical changes of nine small catchments (~20-140 ha drainage areas) in the Marapanim River Basin: seven agricultural catchments and two remnant forest catchments used as references for the original landscape. Smallholder agriculture (cassava, corn, cowpea, pepper and passion fruit) is the dominant type of land use in these catchments, along with several medium-sized cattle ranches. Together, these uses form a land use mosaic that also includes large areas of fallow vegetation. Primary forests are rare and frequently restricted only to riparian zones. Each month over the period of one hydrological year, we measured instantaneous discharge and dissolved anions and cations, as well as pH, electric conductivity (EC), temperature, and dissolved oxygen (DO) in stream water of each catchment. The greatest change in biogeochemistry occurred in a stream draining an area of abundant pasture and no riparian forest, including decreases in DO and nitrate and increases in ammonium, pH, and EC. The collection site for this stream also was near an area where cattle frequently entered the stream to drink water. Moreover, large biogeochemical changes were found in a stream that had a slash-and-burn agricultural system for cassava near the stream, includin... Mostrar Tudo |
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Palavras-Chave: |
Fluvial hydrochemistry. |
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Thesagro: |
Agricultura; Qualidade da água; Uso da terra. |
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Thesaurus Nal: |
agriculture; Amazonia; Biogeochemical cycles; Land use; nutrients; water quality. |
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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/116180/1/2014AA13.zip
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Marc: |
LEADER 02770nam a2200277 a 4500
001 2006348
005 2015-02-23
008 2014 bl uuuu u00u1 u #d
100 1 $aFIGUEIREDO, R. de O.
245 $aHydrobiogeochemical fluxes and its relation to land use changes at small catchments in the Marapanim River Basin, Pará state, Brazil.$h[electronic resource]
260 $aIn: International SWAT Conference, 2014, Porto de Galinhas. Book of Abstracts... Porto de Galinhas: USDA Agricultural Research Service (USDA-ARS)$c2014
300 $ap. 138.
520 $aAbstract; The macro region "Nordeste Paraense" in Pará state is the oldest agricultural settlement area in the Eastern Brazilian Amazon and has been the location of widespread slash-and-burn agriculture for many years. We studied the biogeochemical changes of nine small catchments (~20-140 ha drainage areas) in the Marapanim River Basin: seven agricultural catchments and two remnant forest catchments used as references for the original landscape. Smallholder agriculture (cassava, corn, cowpea, pepper and passion fruit) is the dominant type of land use in these catchments, along with several medium-sized cattle ranches. Together, these uses form a land use mosaic that also includes large areas of fallow vegetation. Primary forests are rare and frequently restricted only to riparian zones. Each month over the period of one hydrological year, we measured instantaneous discharge and dissolved anions and cations, as well as pH, electric conductivity (EC), temperature, and dissolved oxygen (DO) in stream water of each catchment. The greatest change in biogeochemistry occurred in a stream draining an area of abundant pasture and no riparian forest, including decreases in DO and nitrate and increases in ammonium, pH, and EC. The collection site for this stream also was near an area where cattle frequently entered the stream to drink water. Moreover, large biogeochemical changes were found in a stream that had a slash-and-burn agricultural system for cassava near the stream, including decreases in DO and increases in calcium, magnesium, and potassium concentrations. In this region, riparian forest conservation can be an important management tool for mitigating land use change effects on water quality, together with agricultural conservation practices that avoid the use of fire to clear land for crops and pasture.
650 $aagriculture
650 $aAmazonia
650 $aBiogeochemical cycles
650 $aLand use
650 $anutrients
650 $awater quality
650 $aAgricultura
650 $aQualidade da água
650 $aUso da terra
653 $aFluvial hydrochemistry
700 1 $aBARROSO, D. F. R.
700 1 $aPIRES, C. S.
700 1 $aCOSTA, F.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Clima Temperado. Para informações adicionais entre em contato com cpact.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Clima Temperado. |
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Data corrente: |
26/01/2011 |
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Data da última atualização: |
09/02/2011 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
AGOSTINETTO, D.; GALON, L.; SILVA, J. M. B. V.; TIRONI, S. P.; ANDRES, A. |
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Afiliação: |
D. AGOSTINETTO, UFPel; L. GALON, UNIPAMPA; J. M. B. V. SILVA, UFPel; S. P. TIRONI, UFPel; ANDRE ANDRES, CPACT. |
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Título: |
Interferência e nível de dano econômico de capim-arroz sobre o arroz em função do arranjo de plantas da cultura. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Planta Daninha, Viçosa, v. 28, numero expecial, p. 993-1003, 2010. |
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Idioma: |
Português |
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Palavras-Chave: |
Echinochloa spp; Espaçamento entre linhas; Modelos matemáticos. |
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Thesagro: |
Oryza Sativa. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00651naa a2200205 a 4500
001 1874453
005 2011-02-09
008 2010 bl --- 0-- u #d
100 1 $aAGOSTINETTO, D.
245 $aInterferência e nível de dano econômico de capim-arroz sobre o arroz em função do arranjo de plantas da cultura.
260 $c2010
650 $aOryza Sativa
653 $aEchinochloa spp
653 $aEspaçamento entre linhas
653 $aModelos matemáticos
700 1 $aGALON, L.
700 1 $aSILVA, J. M. B. V.
700 1 $aTIRONI, S. P.
700 1 $aANDRES, A.
773 $tPlanta Daninha, Viçosa$gv. 28, numero expecial, p. 993-1003, 2010.
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Embrapa Clima Temperado (CPACT) |
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