| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Amazônia Oriental. |
|
Data corrente: |
31/03/2009 |
|
Data da última atualização: |
22/11/2022 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
MCGRODDY, M. E.; SILVER, W. L.; OLIVEIRA JUNIOR, R. C. de; MELLO, W. Z. de; KELLER, M. |
|
Afiliação: |
M. E. McGroddy, Department of Environmental Studies, Policy, and Management, University of California, Berkeley, California, USA; W. L. Silver, Department of Environmental Studies, Policy, and Management, University of California, Berkeley, California, USA; RAIMUNDO COSME DE OLIVEIRA JUNIOR, CPATU; W. Z. de Mello, Instituto de Química, Departamento de Geoquímica, Universidade Federal Fluminense, Niteroi, Brazil; M. Keller, International Institute of Tropical Forestry, Forest Service, U.S. Department of Agriculture, San Juan, Puerto Rico, USA. |
|
Título: |
Retention of phosphorus in highly weathered soils under a lowland Amazonian forest ecosystem. |
|
Ano de publicação: |
2008 |
|
Fonte/Imprenta: |
Journal of geophysical Research, v. 113, n. G4, p. 1-11, Dec. 2008. |
|
Idioma: |
Inglês |
|
Conteúdo: |
The low available phosphorus (P) pools typical of highly weathered tropical forest soils are thought to result from a combination of export of phosphorus via erosion and leaching as well as chemical reactions resulting in physically and chemically protected P compounds. Despite the low apparent P availability, these soils support some of the highest terrestrial net primary productivity globally. We followed different P fractions after P additions to two soil types, sandy loam and sandy clay, over 1 year in a lowland Amazonian forest. Of all the soil P fractions measured, only the NaHCO3 and NaOH extractable fractions showed a significant increase following P additions, and this occurred only in sandy clays (+ 56.9 ± 15.1 kg ha-1 and + 2.8 ± 1.5 kg ha-1, respectively). Our results indicate that intermediate rather than recalcitrant pools are the dominant fate of added P over an annual timescale even in fine-textured soils. Fine root and forest floor P pools increased more in the sandy loams following P additions suggesting a larger biotic P sink in these soils. Leaching of inorganic P from the surface soils was an unexpected and significant fate of added P in both soil types (9 ± 3% in the sandy loams, 2 ± 1% in the sandy clays). Significantly more of the added P was retained in the sandy clay soils than in the sandy loams (69 ± 20% versus 33 ± 7%) over the 1-year period. |
|
Palavras-Chave: |
Brasil. |
|
Thesagro: |
Ecossistema; Fertilidade do Solo; Fósforo; Solo Florestal. |
|
Thesaurus Nal: |
Amazonia. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02107naa a2200241 a 4500
001 1410229
005 2022-11-22
008 2008 bl uuuu u00u1 u #d
100 1 $aMCGRODDY, M. E.
245 $aRetention of phosphorus in highly weathered soils under a lowland Amazonian forest ecosystem.$h[electronic resource]
260 $c2008
520 $aThe low available phosphorus (P) pools typical of highly weathered tropical forest soils are thought to result from a combination of export of phosphorus via erosion and leaching as well as chemical reactions resulting in physically and chemically protected P compounds. Despite the low apparent P availability, these soils support some of the highest terrestrial net primary productivity globally. We followed different P fractions after P additions to two soil types, sandy loam and sandy clay, over 1 year in a lowland Amazonian forest. Of all the soil P fractions measured, only the NaHCO3 and NaOH extractable fractions showed a significant increase following P additions, and this occurred only in sandy clays (+ 56.9 ± 15.1 kg ha-1 and + 2.8 ± 1.5 kg ha-1, respectively). Our results indicate that intermediate rather than recalcitrant pools are the dominant fate of added P over an annual timescale even in fine-textured soils. Fine root and forest floor P pools increased more in the sandy loams following P additions suggesting a larger biotic P sink in these soils. Leaching of inorganic P from the surface soils was an unexpected and significant fate of added P in both soil types (9 ± 3% in the sandy loams, 2 ± 1% in the sandy clays). Significantly more of the added P was retained in the sandy clay soils than in the sandy loams (69 ± 20% versus 33 ± 7%) over the 1-year period.
650 $aAmazonia
650 $aEcossistema
650 $aFertilidade do Solo
650 $aFósforo
650 $aSolo Florestal
653 $aBrasil
700 1 $aSILVER, W. L.
700 1 $aOLIVEIRA JUNIOR, R. C. de
700 1 $aMELLO, W. Z. de
700 1 $aKELLER, M.
773 $tJournal of geophysical Research$gv. 113, n. G4, p. 1-11, Dec. 2008.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Amazônia Oriental (CPATU) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 3 | |
| 1. |  | MAZIERO, R. R. D.; MATTOS, M. C. C.; MARTIN, I.; OBA, E.; SARTORI, R.; FERREIRA, J. C. P. Concentrações plasmáticas de cortisol e progesterona em vacas Nelore (Bos taurus indicus) submetidas a manejo diário ou manejo semanal. Acta Scientiae Veterinariae, Porto Alegre, v. 35, supl. 3, p. S1034, 2007. Edição dos resumos do XXI Annual Meeting of the Brazilian Embryo Technology Society (SBTE), Salvador, BA, ago. 2007.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
|    |
| 2. | | MOLLO, M. R.; RUMPF, R.; MARTINS, A. C.; MATTOS, M. C. C.; LOPES JUNIOR, G.; CARRIJO, L. H. D.; SARTORI, R. Função ovariana em novilhas Nelore submetidas a baixa ou alta ingestão alimentar. Acta Scientiae Veterinariae, Porto Alegre, v. 35, supl. 3, p. S958, 2007. Edição dos resumos do XXI Annual Meeting of the Brazilian Embryo Technology Society (SBTE), Salvador, BA, ago. 2007.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
| |
| 3. | | MATTOS, M. C. C.; BASTOS, M. R.; GUARDIEIRO, M. M.; CARVALHO, J. O.; FRANCO, M. M.; MOURÃO, G. B.; BARROS, C. M.; SARTORI, R. Improvement of embryo production by the replacement of the last two doses of porcine follicle-stimulating hormone with equine chorionic gonadotropin in Sindhi donors. Animal Reproduction Science, v. 125, p. 119-123, 2011.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
|  |
| Registros recuperados : 3 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
