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2. | | KLAUSNER, S. D.; SUHET, A. R.; DUXBURY, J. M. Estimating Nitrogen Mineralization in a "Cerrado" Dark-Red Latosol, by Laboratory Incubation, and the Effect of Soil Sample Disturbance. Pesquisa Agropecuária Brasileira, Brasília, V. 25, n.4, p. 617-623, abr.1990 Biblioteca(s): Embrapa Unidades Centrais. |
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Registros recuperados : 3 | |
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Registro Completo
Biblioteca(s): |
Embrapa Unidades Centrais. |
Data corrente: |
18/02/2002 |
Data da última atualização: |
18/02/2002 |
Autoria: |
KLAUSNER, S. D.; SUHET, A. R.; DUXBURY, J. M. |
Título: |
Estimating Nitrogen Mineralization in a "Cerrado" Dark-Red Latosol, by Laboratory Incubation, and the Effect of Soil Sample Disturbance. |
Ano de publicação: |
1990 |
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, V. 25, n.4, p. 617-623, abr.1990 |
Idioma: |
Inglês |
Conteúdo: |
Four dark-red latosols (Haplustox) were sampled at or near the "Centro de Pesquisa Agropecuária dos Cerrados - CPAC" - (Cerrados Agriicultural Research Center), in Planaltina, DF, Brazil. A laboratory soil incubation study, at 35ºC and 0.25 bar water tension, was conducted to evaluate the effect of soil disturbance on N mineralization and to determine the suitability of an incubation procedure for estimating N mineralization in the field. Mineralization rates ranged from 1.2 to 8.8 kg N ha-1 wk-1 over a twelve-week period. The data suggested that as long as there is some degree of soil aggregation, soil disturbance had no effect on N mineralization. The amount of N mineralized during the incubation period in the laboratory showed a low correlation with the N mineralization in the field. |
Palavras-Chave: |
nitrogen analysis in soil; savanna. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01365naa a2200169 a 4500 001 1106348 005 2002-02-18 008 1990 bl uuuu u00u1 u #d 100 1 $aKLAUSNER, S. D. 245 $aEstimating Nitrogen Mineralization in a "Cerrado" Dark-Red Latosol, by Laboratory Incubation, and the Effect of Soil Sample Disturbance. 260 $c1990 520 $aFour dark-red latosols (Haplustox) were sampled at or near the "Centro de Pesquisa Agropecuária dos Cerrados - CPAC" - (Cerrados Agriicultural Research Center), in Planaltina, DF, Brazil. A laboratory soil incubation study, at 35ºC and 0.25 bar water tension, was conducted to evaluate the effect of soil disturbance on N mineralization and to determine the suitability of an incubation procedure for estimating N mineralization in the field. Mineralization rates ranged from 1.2 to 8.8 kg N ha-1 wk-1 over a twelve-week period. The data suggested that as long as there is some degree of soil aggregation, soil disturbance had no effect on N mineralization. The amount of N mineralized during the incubation period in the laboratory showed a low correlation with the N mineralization in the field. 653 $anitrogen analysis in soil 653 $asavanna 700 1 $aSUHET, A. R. 700 1 $aDUXBURY, J. M. 773 $tPesquisa Agropecuária Brasileira, Brasília, V. 25$gn.4, p. 617-623, abr.1990
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