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| 13. |  | STAMFORD, N. P.; MOURA, A. M. M. F.; SANTOS, K. S.; SANTOS, P. R. Atuação de acidithiobacillus na solubilização de fosfato natural em solo de Tabuleiro cultivado com Jactupé (Pachyrhizus erosus). Revista Brasileira de Ciência do Solo, Viçosa, Mg, v. 28, n. 1, p. 75-83, jan./fev.2004.| Biblioteca(s): Embrapa Solos / UEP-Recife. |
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| 14. | | SANTOS, P. R. dos; HAUAUINI, E.; FIGLIOLIA, M. B.; ROBERTO, L. P. da C. Ecofisiologia da germinação de sementes de Lonchocarpus guillemineanus (Tull.) Malme. IF. Série Registros, São Paulo, n. 31, p. 179-183, jul. 2007. Edição dos anais do 1º Seminário de Iniciação Científica do Instituto Florestal, São Paulo, 2007.| Biblioteca(s): Embrapa Florestas. |
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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
|
Biblioteca(s): |
Embrapa Cerrados. |
|
Data corrente: |
13/01/1999 |
|
Data da última atualização: |
13/01/1999 |
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Autoria: |
WESTERHOF, R.; VILELA, L.; AYARZA, M.; ZECH, W. |
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Título: |
Land use effects on labile N extracted with permanganate and the nitrogen management index in the cerrado region of Brazil. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Biology and Fertility of Soils, Berlin, v.27, p.353-357, 1998. |
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Idioma: |
Inglês |
|
Conteúdo: |
The effect of and use on the availability of nitrogen (N) was studied by separating total N into a labile and a stable fraction by oxidation and extraction of labile N with KMnO4. The nitrogen management index (NMI) was calculated following the method of Blair et al. (1995) for the carbon management index. In all systems, labile N released by KMnO4 was a better indicator of N availability than total and stable N. The NMI was a good indicator of N availability but gave no information about the total amount of N. In land use system analysis, total N and labile N can used together as a simple and rapid way to evaluate the N status of the soil. Legume-based pastures specifically increased the amount of labile N. Although soybeans had a dominant role in the continuos cropping system studied, the total N contents of these systems were lower than those of the natural Cerrado. The availability of N under legume-based pastures and legume-based pasture-crop rotations was higher than under the natural Cerrado and the continuous cropping systems. |
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Thesagro: |
Cerrado; Mineralização; Nitrogênio; Uso da Terra. |
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Thesaurus NAL: |
land use; mineralization; nitrogen. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01732naa a2200241 a 4500
001 1544522
005 1999-01-13
008 1998 bl --- 0-- u #d
100 1 $aWESTERHOF, R.
245 $aLand use effects on labile N extracted with permanganate and the nitrogen management index in the cerrado region of Brazil.
260 $c1998
520 $aThe effect of and use on the availability of nitrogen (N) was studied by separating total N into a labile and a stable fraction by oxidation and extraction of labile N with KMnO4. The nitrogen management index (NMI) was calculated following the method of Blair et al. (1995) for the carbon management index. In all systems, labile N released by KMnO4 was a better indicator of N availability than total and stable N. The NMI was a good indicator of N availability but gave no information about the total amount of N. In land use system analysis, total N and labile N can used together as a simple and rapid way to evaluate the N status of the soil. Legume-based pastures specifically increased the amount of labile N. Although soybeans had a dominant role in the continuos cropping system studied, the total N contents of these systems were lower than those of the natural Cerrado. The availability of N under legume-based pastures and legume-based pasture-crop rotations was higher than under the natural Cerrado and the continuous cropping systems.
650 $aland use
650 $amineralization
650 $anitrogen
650 $aCerrado
650 $aMineralização
650 $aNitrogênio
650 $aUso da Terra
700 1 $aVILELA, L.
700 1 $aAYARZA, M.
700 1 $aZECH, W.
773 $tBiology and Fertility of Soils, Berlin$gv.27, p.353-357, 1998.
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