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Registro Completo |
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
16/07/1999 |
Data da última atualização: |
16/07/1999 |
Autoria: |
WESTERHOF, R.; VILELA, L.; AYARZA, M. A.; ZECH, W. |
Título: |
Labile N and the nitrogen management index of oxissols in the Brazilian cerrados. |
Ano de publicação: |
1999 |
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. |
Páginas: |
p.133-140. |
Idioma: |
Inglês |
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. |
Thesagro: |
Cerrado; Manejo; Mineralização; Nitrogênio; Oxisol; Permanganato de Potássio; Uso da Terra. |
Thesaurus Nal: |
Ferralsols; land use; mineralization; nitrogen; potassium permanganate. |
Categoria do assunto: |
-- |
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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Registros recuperados : 86 | |
30. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | LILIENFEIN, J.; WILCKE, W.; AYARZA, M. A.; LIMA, S. do C.; VILELA, L.; ZECH, W. Annual course of matric potential in differently used savanna oxisols in Brazil. Soil Society of American Journal, Madison, v.63, p.1778-1785, 1999.Biblioteca(s): Embrapa Cerrados. |
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31. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | WESTERHOF, R.; BUURMAN, P.; GRIETHUYSEN, C. van; AYARZA, M. A.; VILELA, L.; ZECH, W. Aggregation studied by laser diffraction in relation to plowing and liming in the Cerrado region in Brazil. Geoderma, Amsterdam, v.90, p.277-290, 1999.Biblioteca(s): Embrapa Cerrados. |
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32. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | WESTERHOF, R.; BUURMAN, P.; GRIETHUYSEN, C. van; AYARZA, M. A.; VILELA, L.; ZECH, W. Aggregation studied by laser diffraction in relation to plowing, soil organic matter, and lime in the Brazilian cerrados. 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. p.64-76.Biblioteca(s): Embrapa Cerrados. |
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33. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | STEINER, C.; TEIXEIRA, W. G.; NARAYAN; MAJOR, J.; LEHMANN, J.; ZECH, W.; BLUM, W. E. H. Corte e carbonização como uma alternativa ao corte e queima: estudos na Amazônia. In: TEIXEIRA, W. G.; KERN, D. C.; MADARI, B. E.; LIMA, H. N.; WOODS, W. (Ed.). As terras pretas de índio da Amazônia : sua caracterização e uso deste conhecimento na criação de novas áreas. Manaus: Embrapa Amazônia Ocidental, 2009. p. 297-305.Tipo: Capítulo em Livro Técnico-Científico |
Biblioteca(s): Embrapa Amazônia Ocidental. |
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34. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | LILIENFEIN, J.; WILCKE, W.; AYARZA, M. A.; VILELA, L.; LIMA, S. do C.; ZECH, W. Chemical fractionation of phosphorus, sulphur, and molybdenum in Brazilian savannah oxisols under different land use. Geoderma, Amsterdam, v. 96, p. 31-46, 2000.Biblioteca(s): Embrapa Cerrados. |
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