| |
|
|
|
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.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Cerrados (CPAC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 419 | |
| Registros recuperados : 419 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
