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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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Registro Completo
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Biblioteca(s): |
Embrapa Clima Temperado. |
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Data corrente: |
05/04/2016 |
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Data da última atualização: |
05/04/2016 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
ROANI, T. de F. M.; SCHEEREN, R. H.; SILVA, M. L. da; GEHLING, R. K.; REGINATO, J. L.; AGUILA, L. S. H. D. |
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Afiliação: |
TATIELEN DE FÁTIMA MARAFÃO ROANI, UFPEL; RAFAEL HEITOR SCHEEREN, UFPEL; MAURO LLOVET DA SILVA, UFPEL; RAFAEL KUHN GEHLING, UFPEL; JÚLIA LIMA REGINATO, UFPEL; LILIA SICHMANN HEIFFIG DEL AGUILA, CPACT. |
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Título: |
Semeadura cruzada, fileiras duplas e espaçamento reduzido: Capão do leão/RS - safras 2013/2014 e 2014/2015. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: CONGRESSO DE INICIAÇÃO CIENTÍFICA, 24.; ENCONTRO DE PÓS-GRADUAÇÃO, 17., 2015, Pelotas. [Anais.]. Pelotas: UFPel, 2015. |
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Idioma: |
Português |
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Thesagro: |
Semeadura. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/142008/1/LILIA-SICHMANN-HEIFFIG-Resumo-CIC2015-Soja.pdf
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Marc: |
LEADER 00640nam a2200169 a 4500
001 2042615
005 2016-04-05
008 2015 bl uuuu u00u1 u #d
100 1 $aROANI, T. de F. M.
245 $aSemeadura cruzada, fileiras duplas e espaçamento reduzido$bCapão do leão/RS - safras 2013/2014 e 2014/2015.$h[electronic resource]
260 $aIn: CONGRESSO DE INICIAÇÃO CIENTÍFICA, 24.; ENCONTRO DE PÓS-GRADUAÇÃO, 17., 2015, Pelotas. [Anais.]. Pelotas: UFPel$c2015
650 $aSemeadura
700 1 $aSCHEEREN, R. H.
700 1 $aSILVA, M. L. da
700 1 $aGEHLING, R. K.
700 1 $aREGINATO, J. L.
700 1 $aAGUILA, L. S. H. D.
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Embrapa Clima Temperado (CPACT) |
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