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Registro Completo |
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Biblioteca(s): |
Embrapa Cocais. |
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Data corrente: |
01/11/2016 |
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Data da última atualização: |
24/02/2017 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
COSTA, F. de S.; SALES, M. F. L.; FREITAS, A. C. R. de; SOUZA, C. P. de. |
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Afiliação: |
FALBERNI DE SOUZA COSTA, CPAF-Acre; MAYKEL FRANKLIM LIMA SALES, CPAF-Acre; ANTONIO CARLOS REIS DE FREITAS, CPACP; Cleberson Pereira de Souza, Universidade Federal do Acre. |
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Título: |
Modeling nitrous oxide emissions in grass and grass-legume pastures in the western Brazilian Amazon. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
In: SIMPÓSIO INTERNACIONAL SOBRE GASES DE EFEITO ESTUFA NA AGROPECUÁRIA, 2. 2016, Campo Grande, MS. Anais... Campo Grande: Embrapa Gado de Corte, 2016. |
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Páginas: |
3 p. |
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Descrição Física: |
Resumo expandido |
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Idioma: |
Inglês |
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Notas: |
Coordenação: Roberto Giolo de Almeida. |
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Conteúdo: |
Mineral nitrogen (N) dynamics in soil and the exchange of N gaseous in the interface soil-atmosphere are intimately associated with animal manure in pastures. According to soil inorganic-N pools and the site studied, forest or pasture, and pastures age the soil inorganic-N pools of ammonium and nitrate can be similar in the forest or ammonium dominated in the pasture. Also annual average net nitrification rates at soil surface in forest can be higher than in pasture suggesting a higher potential for nitrate-N losses either through leaching or gaseous emissions from intact forests compared with established pastures (NEILL et al., 1995). |
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Palavras-Chave: |
Emissão de óxido nitroso; Esterco animal. |
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Thesagro: |
Gramínea Forrageira; Nitrificação; Pastagem; Solo. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01530naa a2200253 a 4500
001 2055767
005 2017-02-24
008 2016 bl --- 0-- u #d
100 1 $aCOSTA, F. de S.
245 $aModeling nitrous oxide emissions in grass and grass-legume pastures in the western Brazilian Amazon.$h[electronic resource]
260 $c2016
300 $a3 p.$cResumo expandido
500 $aCoordenação: Roberto Giolo de Almeida.
520 $aMineral nitrogen (N) dynamics in soil and the exchange of N gaseous in the interface soil-atmosphere are intimately associated with animal manure in pastures. According to soil inorganic-N pools and the site studied, forest or pasture, and pastures age the soil inorganic-N pools of ammonium and nitrate can be similar in the forest or ammonium dominated in the pasture. Also annual average net nitrification rates at soil surface in forest can be higher than in pasture suggesting a higher potential for nitrate-N losses either through leaching or gaseous emissions from intact forests compared with established pastures (NEILL et al., 1995).
650 $aGramínea Forrageira
650 $aNitrificação
650 $aPastagem
650 $aSolo
653 $aEmissão de óxido nitroso
653 $aEsterco animal
700 1 $aSALES, M. F. L.
700 1 $aFREITAS, A. C. R. de
700 1 $aSOUZA, C. P. de
773 $tIn: SIMPÓSIO INTERNACIONAL SOBRE GASES DE EFEITO ESTUFA NA AGROPECUÁRIA, 2. 2016, Campo Grande, MS. Anais... Campo Grande: Embrapa Gado de Corte, 2016.
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Registro original: |
Embrapa Cocais (CPACP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
14/06/2012 |
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Data da última atualização: |
10/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
COMTE, I.; DAVIDSON, R.; LUCOTTE, M.; CARVALHO, C. J. R. de; OLIVEIRA, F. de A.; SILVA, B. P. da; ROUSSEAU, G. X. |
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Afiliação: |
IRINA COMTE, GEOTOP; ROBERT DAVIDSON, UNIVERSITÉ DU QUÉBEC; MARC LUCOTTE, GEOTOP; CLAUDIO JOSE REIS DE CARVALHO, CPATU; FRANCISCO DE ASSIS OLIVEIRA, UFRA; BRENO PANTOJA DA SILVA, UEPA; GUILLAUME X. ROUSSEAU, UEMA. |
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Título: |
Physicochemical properties of soils in the Brazilian Amazon following fire-free land preparation and slash-and-burn practices. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Agriculture, Ecosystems and Environment, v. 156, p. 108-115, Aug. 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
Over a century, subsistence agriculture has been practiced in the Brazilian Amazon, using slash-and-burn as a traditional land clearing technique. However, fire clearing leads to nutrient losses, and the increasing demographic pressure reduces the duration of the fallow period, threatening the system sustainability. The chop-and-mulch land clearing method, combined or not with legume-enriched fallow, is a promising alternative technique as the retention of organic residues upon land clearance of fallow could promote soil fertility. The aim of this study is to assess the effect of fire-free land preparation on soil physicochemical properties by comparing the effects of traditional slash-and-burn with (i) chop-and mulch with enriched fallow in croplands and (ii) chop-and-mulch without enriched fallow in pastures. The chop-and-mulch of a legume-enriched fallow conserved soil bulk density, and significantly increased nutrient concentrations and organic matter content compared to the burnt cropland and the control forest. In the pastures, the use of chop-and-mulch of a non-enriched fallow had less impact on soil physical and chemical properties, excepted on water retention capacity and total P stock. Land clearing of fallows by chop-and-mulch, especially when enriched with legumes could significantly improve agriculture sustainability in the region and reduce the pressure on primary forests. |
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Palavras-Chave: |
Queima-e-corte. |
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Thesagro: |
Agricultura de Subsistência; Solo. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02140naa a2200229 a 4500
001 1926517
005 2022-11-10
008 2012 bl uuuu u00u1 u #d
100 1 $aCOMTE, I.
245 $aPhysicochemical properties of soils in the Brazilian Amazon following fire-free land preparation and slash-and-burn practices.$h[electronic resource]
260 $c2012
520 $aOver a century, subsistence agriculture has been practiced in the Brazilian Amazon, using slash-and-burn as a traditional land clearing technique. However, fire clearing leads to nutrient losses, and the increasing demographic pressure reduces the duration of the fallow period, threatening the system sustainability. The chop-and-mulch land clearing method, combined or not with legume-enriched fallow, is a promising alternative technique as the retention of organic residues upon land clearance of fallow could promote soil fertility. The aim of this study is to assess the effect of fire-free land preparation on soil physicochemical properties by comparing the effects of traditional slash-and-burn with (i) chop-and mulch with enriched fallow in croplands and (ii) chop-and-mulch without enriched fallow in pastures. The chop-and-mulch of a legume-enriched fallow conserved soil bulk density, and significantly increased nutrient concentrations and organic matter content compared to the burnt cropland and the control forest. In the pastures, the use of chop-and-mulch of a non-enriched fallow had less impact on soil physical and chemical properties, excepted on water retention capacity and total P stock. Land clearing of fallows by chop-and-mulch, especially when enriched with legumes could significantly improve agriculture sustainability in the region and reduce the pressure on primary forests.
650 $aAgricultura de Subsistência
650 $aSolo
653 $aQueima-e-corte
700 1 $aDAVIDSON, R.
700 1 $aLUCOTTE, M.
700 1 $aCARVALHO, C. J. R. de
700 1 $aOLIVEIRA, F. de A.
700 1 $aSILVA, B. P. da
700 1 $aROUSSEAU, G. X.
773 $tAgriculture, Ecosystems and Environment$gv. 156, p. 108-115, Aug. 2012.
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