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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
22/12/1999 |
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Data da última atualização: |
10/04/2007 |
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Autoria: |
MARTIN-NETO, L.; ROSELL, R.; SPOSITO, G. |
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Afiliação: |
EMBRAPA-CNPDIA; Universidad Nacional del Sur-Departamento de Agronomia-LAHBIS; University of California-Ecosystem Sciences. |
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Título: |
Correlation of spectroscopic indicators of humification with mean annual rainfall along a temperate grassland climosequence. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Geoderma, Amsterdam, v. 81, n. 3/4, p. 305-311, Jan., 1998. |
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Idioma: |
Inglês |
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Conteúdo: |
The stable free radical concentration, as measured by electron spin resonance spectroscopy, and the E4/E6 absorbance ratio were for a suite of humic acids extracted from uncultivated surface soils collected along a 620 km climosequence in the Argentine Pampa (mean annual temperature, 14-15§C; mean annual rainfall, 300-100 mm). These two spectroscopic properties were interpreted as indicators of the degree of humification of soil organic matter, with free radical concentration expected to increase and the E4/E6 ratio to decrease with greater humification. Both the free radical concentration and the E4/E6 ratio were found to be significantly correlated with increasing mean annual rainfall, which was accompanied by an increase in the stable free radical concentration and a decrease in the E4/E6 ratio. Our results indicate that, in the sequence of temperate grassland soils investigated, organic matter humification increased with increasing rainfall. |
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Palavras-Chave: |
Climosequence; Climosequencia; Pampean region; Radicais livres; Regiao dos Pampas. |
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Thesagro: |
Húmus; Matéria Orgânica; Solo. |
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Thesaurus Nal: |
free radicals; organic matter; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01743naa a2200277 a 4500
001 1026427
005 2007-04-10
008 1998 bl --- 0-- u #d
100 1 $aMARTIN-NETO, L.
245 $aCorrelation of spectroscopic indicators of humification with mean annual rainfall along a temperate grassland climosequence.
260 $c1998
520 $aThe stable free radical concentration, as measured by electron spin resonance spectroscopy, and the E4/E6 absorbance ratio were for a suite of humic acids extracted from uncultivated surface soils collected along a 620 km climosequence in the Argentine Pampa (mean annual temperature, 14-15§C; mean annual rainfall, 300-100 mm). These two spectroscopic properties were interpreted as indicators of the degree of humification of soil organic matter, with free radical concentration expected to increase and the E4/E6 ratio to decrease with greater humification. Both the free radical concentration and the E4/E6 ratio were found to be significantly correlated with increasing mean annual rainfall, which was accompanied by an increase in the stable free radical concentration and a decrease in the E4/E6 ratio. Our results indicate that, in the sequence of temperate grassland soils investigated, organic matter humification increased with increasing rainfall.
650 $afree radicals
650 $aorganic matter
650 $asoil
650 $aHúmus
650 $aMatéria Orgânica
650 $aSolo
653 $aClimosequence
653 $aClimosequencia
653 $aPampean region
653 $aRadicais livres
653 $aRegiao dos Pampas
700 1 $aROSELL, R.
700 1 $aSPOSITO, G.
773 $tGeoderma, Amsterdam$gv. 81, n. 3/4, p. 305-311, Jan., 1998.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com cnpgc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
24/01/2013 |
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Data da última atualização: |
15/02/2013 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
MACHADO, L. A. Z.; CONCENCO, G.; JANK, L. |
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Afiliação: |
LUIS ARMANDO ZAGO MACHADO, CPAO; GERMANI CONCENCO, CPAO; LIANA JANK, CNPGC. |
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Título: |
Genotype tolerance of Panicum maximum Jacq. to the herbicide glyphosate aiming crop-livestock integration. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
IN: INTERNATIONAL SYMPOSIUM ON INTEGRATED CROP-LIVESTOCK SYSTEMS, 2., 2012, Porto Alegre. Anais. Porto Alegre: UFRGS, 2012. |
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Páginas: |
3 p. |
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Idioma: |
Inglês |
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Conteúdo: |
This study aimed to evaluate the production of forage and the tolerance of P. maximum genotypes to the herbicide glyphosate, trying to identify those which will be properly controlled by occasion of the following soybean crop. |
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Thesagro: |
Melhoramento Genético Vegetal; Panicum Maximum; Planta Forrageira. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00872nam a2200181 a 4500
001 1946354
005 2013-02-15
008 2012 bl uuuu u00u1 u #d
100 1 $aMACHADO, L. A. Z.
245 $aGenotype tolerance of Panicum maximum Jacq. to the herbicide glyphosate aiming crop-livestock integration.$h[electronic resource]
260 $aIN: INTERNATIONAL SYMPOSIUM ON INTEGRATED CROP-LIVESTOCK SYSTEMS, 2., 2012, Porto Alegre. Anais. Porto Alegre: UFRGS$c2012
300 $a3 p.
520 $aThis study aimed to evaluate the production of forage and the tolerance of P. maximum genotypes to the herbicide glyphosate, trying to identify those which will be properly controlled by occasion of the following soybean crop.
650 $aMelhoramento Genético Vegetal
650 $aPanicum Maximum
650 $aPlanta Forrageira
700 1 $aCONCENCO, G.
700 1 $aJANK, L.
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