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Registro Completo |
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Biblioteca(s): |
Embrapa Solos / UEP-Recife; Embrapa Unidades Centrais. |
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Data corrente: |
02/08/2012 |
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Data da última atualização: |
17/08/2017 |
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Autoria: |
POTES, M. da L.; DICK, D. P.; SANTANA, G. S.; TOMAZI, M.; BAYER, C. |
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Afiliação: |
Mariana da Luz Potes, CPACT; Deborah Pinheiro Dick, Universidade Federal do rio Grande do sul; Graciele Sarante Santana, UFRGS; MICHELY TOMAZI, CPAO; Cimélio Bayer, UFRGS. |
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Título: |
Soil organic matter in fire-affected pastures and in an Araucaria forest in South-Brazilian leptosols. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 47, n. 5, p. 707-715, maio 2012. |
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Idioma: |
Inglês |
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Notas: |
Título em português: Matéria orgânica do solo em pastagens afetadas pelo fogo e em mata de Araucária em Neossolos sul?brasileiros. |
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Conteúdo: |
The objective of this work was to evaluate the distribution pattern and composition of soil organic matter (SOM) and its physical pools of Leptosols periodically affected by fire over the last 100 years in South Brazil. Soil samples at 0?5, 5?10, and 10?15 cm depths were collected from the following environments: native pasture without burning in the last year and grazed with 0.5 livestock per hectare per year (1NB); native pasture without burning in the last 23 years and grazed with 2.0 livestock per hectare per year (23NB); and an Araucaria forest (AF). Physical fractionation was performed with the 0?5 and 5?10 cm soil layers. Soil C and N stocks were determined in the three depths and in the physical pools, and organic matter was characterized by infrared spectroscopy and thermogravimetry. The largest C stocks in all depths and physical pools were found under the AF. The 23NB environment showed the lowest soil C and N stocks at the 5?15 cm depth, which was related to the end of burning and to the higher grazing intensity. The SOM of the occluded light fraction showed a greater chemical recalcitrance in 1NB than in 23NB. Annual pasture burning does not affect soil C stocks up to 15 cm of depth. Index terms: physical |
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Palavras-Chave: |
Carbon stock; Chemical recalcitrance; Estoque de carbono; Frações físicas; Physical pools; Recalcitrância química; Termodecomposição; Thermo-decomposition. |
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Thesagro: |
Composição química. |
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Thesaurus Nal: |
Carbon sinks; chemical composition. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/62906/1/Soil-organic-matter.pdf
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Marc: |
LEADER 02301naa a2200313 a 4500
001 1930322
005 2017-08-17
008 2012 bl uuuu u00u1 u #d
100 1 $aPOTES, M. da L.
245 $aSoil organic matter in fire-affected pastures and in an Araucaria forest in South-Brazilian leptosols.
260 $c2012
500 $aTítulo em português: Matéria orgânica do solo em pastagens afetadas pelo fogo e em mata de Araucária em Neossolos sul?brasileiros.
520 $aThe objective of this work was to evaluate the distribution pattern and composition of soil organic matter (SOM) and its physical pools of Leptosols periodically affected by fire over the last 100 years in South Brazil. Soil samples at 0?5, 5?10, and 10?15 cm depths were collected from the following environments: native pasture without burning in the last year and grazed with 0.5 livestock per hectare per year (1NB); native pasture without burning in the last 23 years and grazed with 2.0 livestock per hectare per year (23NB); and an Araucaria forest (AF). Physical fractionation was performed with the 0?5 and 5?10 cm soil layers. Soil C and N stocks were determined in the three depths and in the physical pools, and organic matter was characterized by infrared spectroscopy and thermogravimetry. The largest C stocks in all depths and physical pools were found under the AF. The 23NB environment showed the lowest soil C and N stocks at the 5?15 cm depth, which was related to the end of burning and to the higher grazing intensity. The SOM of the occluded light fraction showed a greater chemical recalcitrance in 1NB than in 23NB. Annual pasture burning does not affect soil C stocks up to 15 cm of depth. Index terms: physical
650 $aCarbon sinks
650 $achemical composition
650 $aComposição química
653 $aCarbon stock
653 $aChemical recalcitrance
653 $aEstoque de carbono
653 $aFrações físicas
653 $aPhysical pools
653 $aRecalcitrância química
653 $aTermodecomposição
653 $aThermo-decomposition
700 1 $aDICK, D. P.
700 1 $aSANTANA, G. S.
700 1 $aTOMAZI, M.
700 1 $aBAYER, C.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 47, n. 5, p. 707-715, maio 2012.
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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Biblioteca |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
05/02/1996 |
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Data da última atualização: |
22/11/2022 |
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Autoria: |
COSTA, J. P. C. da; BELO, M. |
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Afiliação: |
JOSE PAULO CHAVES DA COSTA, CPATU; MURACY BELO, FCAV-UNESP. |
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Título: |
Efeito de duas espécies de Derris (D.nicou e D. urucu ) em larvas de duas linhagens de mosca doméstica (L.). |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Revista Brasileira de Genética, v. 18, n. 3, p. 298, 1995. |
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Idioma: |
Português |
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Palavras-Chave: |
Control; Derris nicou; Derris urucu; Insect; Insecticide plant; Planta inseticida. |
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Thesagro: |
Inseto. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/37561/1/s0795.pdf
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Marc: |
LEADER 00625naa a2200205 a 4500
001 1397112
005 2022-11-22
008 1995 bl uuuu u00u1 u #d
100 1 $aCOSTA, J. P. C. da
245 $aEfeito de duas espécies de Derris (D.nicou e D. urucu ) em larvas de duas linhagens de mosca doméstica (L.).$h[electronic resource]
260 $c1995
650 $aInseto
653 $aControl
653 $aDerris nicou
653 $aDerris urucu
653 $aInsect
653 $aInsecticide plant
653 $aPlanta inseticida
700 1 $aBELO, M.
773 $tRevista Brasileira de Genética$gv. 18, n. 3, p. 298, 1995.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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