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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
10/12/2010 |
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Data da última atualização: |
10/12/2010 |
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Tipo da produção científica: |
Artigo de Divulgação na Mídia |
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Autoria: |
SILVA, F. A. M. da. |
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Afiliação: |
FERNANDO ANTONIO MACENA DA SILVA, CPAC. |
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Título: |
Chuvas intensificam. |
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Ano de publicação: |
2010 |
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Fonte/Imprenta: |
Jornal de Brasília, Brasília, 12 mar. 2010. |
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Idioma: |
Português |
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Palavras-Chave: |
Distrito Federal. |
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Thesagro: |
Agricultura; Meteorologia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00367naa a2200145 a 4500
001 1869413
005 2010-12-10
008 2010 bl uuuu u00u1 u #d
100 1 $aSILVA, F. A. M. da
245 $aChuvas intensificam.
260 $c2010
650 $aAgricultura
650 $aMeteorologia
653 $aDistrito Federal
773 $tJornal de Brasília, Brasília, 12 mar. 2010.
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Embrapa Cerrados (CPAC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
16/07/1999 |
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Data da última atualização: |
16/07/1999 |
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Autoria: |
WESTERHOF, R.; VILELA, L.; AYARZA, M. A.; ZECH, W. |
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Título: |
Labile N and the nitrogen management index of oxissols in the Brazilian cerrados. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
In: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999. |
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Páginas: |
p.133-140. |
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Idioma: |
Inglês |
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Conteúdo: |
The effect of land use on the availability of soil nitrogen (N) was studied by separating total soil N into one labile and one stable fraction by oxidation and extraction of labile N with potassium permanganate. The nitrogen management index (NMI) was calculated according to Blair et al. (1995) for the carbon management index. In all systems, labile N released by potassium permanganate was a better indicator for nitrogen availability than were total and stable N. The NMI was a good indicator for N availability but gave no information on the total amount of N. In land-use systems analysis, total N and labile can be used together as a simple and rapid way to evaluate the nitrogen status of the soil. Legume-based pastures specifically increased the amount of labile N. Although soybeans had a dominant role in the continuous cropping systems studied, total N contents decreased, compared with native savanna. The availability of N under legume-based pastures and legume-based pastures/crop rotations was higher than under native savanna and continuous cropping systems. |
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Thesagro: |
Cerrado; Manejo; Mineralização; Nitrogênio; Oxisol; Permanganato de Potássio; Uso da Terra. |
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Thesaurus NAL: |
Ferralsols; land use; mineralization; nitrogen; potassium permanganate. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02029naa a2200313 a 4500
001 1545405
005 1999-07-16
008 1999 bl uuuu u00u1 u #d
100 1 $aWESTERHOF, R.
245 $aLabile N and the nitrogen management index of oxissols in the Brazilian cerrados.
260 $c1999
300 $ap.133-140.
520 $aThe effect of land use on the availability of soil nitrogen (N) was studied by separating total soil N into one labile and one stable fraction by oxidation and extraction of labile N with potassium permanganate. The nitrogen management index (NMI) was calculated according to Blair et al. (1995) for the carbon management index. In all systems, labile N released by potassium permanganate was a better indicator for nitrogen availability than were total and stable N. The NMI was a good indicator for N availability but gave no information on the total amount of N. In land-use systems analysis, total N and labile can be used together as a simple and rapid way to evaluate the nitrogen status of the soil. Legume-based pastures specifically increased the amount of labile N. Although soybeans had a dominant role in the continuous cropping systems studied, total N contents decreased, compared with native savanna. The availability of N under legume-based pastures and legume-based pastures/crop rotations was higher than under native savanna and continuous cropping systems.
650 $aFerralsols
650 $aland use
650 $amineralization
650 $anitrogen
650 $apotassium permanganate
650 $aCerrado
650 $aManejo
650 $aMineralização
650 $aNitrogênio
650 $aOxisol
650 $aPermanganato de Potássio
650 $aUso da Terra
700 1 $aVILELA, L.
700 1 $aAYARZA, M. A.
700 1 $aZECH, W.
773 $tIn: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999.
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