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 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
12/01/2001 |
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Data da última atualização: |
08/06/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ROSCOE, R.; VASCONCELLOS, C. A.; FURTINI NETO, A. E.; GUEDES, G. A. A.; FERNANDES, L. A. |
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Afiliação: |
EMBRAPA-CNPMS. |
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Título: |
Urease activity and its relation to soil organic matter, microbial biomass nitrogen and urea-nitrogen assimilation by maize in a Brazilian Oxisol under no-tillage and tillage systems. |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Biology and Fertility of Soils, Berlin, v. 32, n. 1, p. 52-59, 2000. |
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Idioma: |
Inglês |
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Conteúdo: |
We studied the relationship between urease activity (UA) and soil organic matter (SOM), microbial biomass N (Nbiom) content, and urea-N fertilizer assimilation by maize in a Dark Red Latosol (Typic Haplustox) cultivated for 9 years under no-tillage (NT), tillage with a disc plough (DP), and tillage with a moldboard plough (MP). Two soil depths were sampled (0-7.5 cm and 7.5-15 cm) at 4 different times during the crop cycle. Urea was applied at four different rates, ranging from 0 to 240 kg N ha-1. The levels of fertilizer N did not affect the UA, SOM content, and Nbiom content. No significant difference between the treatments (NT, DP, and MP) was observed for SOM during the experiment, probably because the major part of the SOM was in recalcitrant pools, since the area was previously cultivated (conventional tillage) for 20 years. The Nbiom content explained 97% and 69% of the variation in UA in the upper and deeper soil layer, respectively. UA and biomass N were significantly higher in the NT system compared to the DP and MP systems. The highest maize productivity and urea-N recovery was also observed for the NT system. We observed that the increase in urea-N losses under NT, possibly as a consequence of a higher UA, was compensated for by the increase in N immobilized in the biomass. |
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Palavras-Chave: |
Maize. |
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Thesagro: |
Biomassa; Matéria Orgânica; Milho; Nitrogênio; Plantio Direto; Solo; Uréase; Zea Mays. |
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Thesaurus Nal: |
biomass; nitrogen; organic matter; soil; tillage; urea. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02318naa a2200349 a 4500
001 1484478
005 2018-06-08
008 2000 bl uuuu u00u1 u #d
100 1 $aROSCOE, R.
245 $aUrease activity and its relation to soil organic matter, microbial biomass nitrogen and urea-nitrogen assimilation by maize in a Brazilian Oxisol under no-tillage and tillage systems.$h[electronic resource]
260 $c2000
520 $aWe studied the relationship between urease activity (UA) and soil organic matter (SOM), microbial biomass N (Nbiom) content, and urea-N fertilizer assimilation by maize in a Dark Red Latosol (Typic Haplustox) cultivated for 9 years under no-tillage (NT), tillage with a disc plough (DP), and tillage with a moldboard plough (MP). Two soil depths were sampled (0-7.5 cm and 7.5-15 cm) at 4 different times during the crop cycle. Urea was applied at four different rates, ranging from 0 to 240 kg N ha-1. The levels of fertilizer N did not affect the UA, SOM content, and Nbiom content. No significant difference between the treatments (NT, DP, and MP) was observed for SOM during the experiment, probably because the major part of the SOM was in recalcitrant pools, since the area was previously cultivated (conventional tillage) for 20 years. The Nbiom content explained 97% and 69% of the variation in UA in the upper and deeper soil layer, respectively. UA and biomass N were significantly higher in the NT system compared to the DP and MP systems. The highest maize productivity and urea-N recovery was also observed for the NT system. We observed that the increase in urea-N losses under NT, possibly as a consequence of a higher UA, was compensated for by the increase in N immobilized in the biomass.
650 $abiomass
650 $anitrogen
650 $aorganic matter
650 $asoil
650 $atillage
650 $aurea
650 $aBiomassa
650 $aMatéria Orgânica
650 $aMilho
650 $aNitrogênio
650 $aPlantio Direto
650 $aSolo
650 $aUréase
650 $aZea Mays
653 $aMaize
700 1 $aVASCONCELLOS, C. A.
700 1 $aFURTINI NETO, A. E.
700 1 $aGUEDES, G. A. A.
700 1 $aFERNANDES, L. A.
773 $tBiology and Fertility of Soils, Berlin$gv. 32, n. 1, p. 52-59, 2000.
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| Registros recuperados : 12 | |
| 2. |  | COELHO, A. M.; FRANCA, G. E.; BAHIA FILHO, A. F. C.; GUEDES, G. A. A. Balanço de nitrogênio (15 N) em um Latossolo vermelho-escuro, sob vegetação de cerrado, cultivado com milho. Revista Brasileira de Ciência do Solo, Campinas, v. 15, p. 187-193, 1991.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 4. | | ROSCOE, R.; VASCONCELLOS, C. A.; FURTINI NETO, A. E.; GUEDES, G. A. A. Atividade da urease em um latossolo vermelho escuro de Sete Lagoas, MG, cultivado com milho, sob diferentes métodos de preparo de solo. In: REUNIÃO BRASILEIRA DE FERTILIDADE DO SOLO E NUTRIÇÃO DE PLANTAS, 22., 1996, Manaus. Resumos expandidos... Manaus: UA/FCA/EMBRAPA/INPA, 1996. p. 541-542.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 10. | | ROSCOE, R.; VASCONCELLOS, C. A.; FURTINI NETO, A. E.; GUEDES, G. A. A.; FERNANDES, L. A. Urease activity and its relation to soil organic matter, microbial biomass nitrogen and urea-nitrogen assimilation by maize in a Brazilian Oxisol under no-tillage and tillage systems. Biology and Fertility of Soils, Berlin, v. 32, n. 1, p. 52-59, 2000.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Milho e Sorgo. |
|  |
| 11. | | FERNANDES, L. A.; FURTINI NETO, A. E.; CURI, N.; GUEDES, G. A. A.; LIMA, J. M. de. Fósforo e atividade da fosfatase ácida em plantas de feijoeiro. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 33, n. 5, p. 769-778, maio 1998 Título em inglês: Phosphorus and activity of acid phosphatase in common bean plants.| Biblioteca(s): Embrapa Unidades Centrais. |
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| 12. | | FERNANDES, L. A.; FURTINI NETO, A. E.; CURI, N.; LIMA, J. M. de; GUEDES, G. A. A. Fósforo e atividade de fosfatase em dois solos sob diferentes condições de uso. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 33, n. 7, p. 1159-70, jul. 1998 Título em inglês: Phosphorus and acid phosphatase activity in two soils under different use conditions.| Biblioteca(s): Embrapa Unidades Centrais. |
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| Registros recuperados : 12 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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