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Registro Completo |
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
20/04/1999 |
Data da última atualização: |
20/04/1999 |
Autoria: |
ROSCOE, J. S.; ARAUJO FILHO, J. O. de. |
Título: |
Estudo cinematico do empurrao Araxa-Paranoa na porcao leste da mega-inflexao dos Pirineus. |
Ano de publicação: |
1994 |
Fonte/Imprenta: |
In: SEMINARIO DE PESQUISA DA UnB GRADUACAO, POS-GRADUACAO E PROJETOS GERAIS, 3., 1993, Brasilia, DF. Voce pesquisa? entao... mostre! anais. Brasilia: UnB, 1994. |
Páginas: |
p.66-67. |
Idioma: |
Português |
Notas: |
Resumo. |
Palavras-Chave: |
Brasil; Pirineus. |
Thesagro: |
Cerrado; Geologia. |
Thesaurus Nal: |
Brazil; geology. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00689naa a2200217 a 4500 001 1545252 005 1999-04-20 008 1994 bl uuuu u00u1 u #d 100 1 $aROSCOE, J. S. 245 $aEstudo cinematico do empurrao Araxa-Paranoa na porcao leste da mega-inflexao dos Pirineus. 260 $c1994 300 $ap.66-67. 500 $aResumo. 650 $aBrazil 650 $ageology 650 $aCerrado 650 $aGeologia 653 $aBrasil 653 $aPirineus 700 1 $aARAUJO FILHO, J. O. de 773 $tIn: SEMINARIO DE PESQUISA DA UnB GRADUACAO, POS-GRADUACAO E PROJETOS GERAIS, 3., 1993, Brasilia, DF. Voce pesquisa? entao... mostre! anais. Brasilia: UnB, 1994.
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Registro Completo
Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
Data corrente: |
26/12/2011 |
Data da última atualização: |
26/05/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 2 |
Autoria: |
XAVIER, F. A. da S.; ALMEIDA, E. F.; CARDOSO, I. M.; MENDONCA, E. de S. |
Afiliação: |
FRANCISCO ALISSON DA SILVA XAVIER, CNPMF; EVERSON F. ALMEIDA; IRENE M. CARDOSO; EDUARDO DE SA MENDONCA. |
Título: |
Soil phosphorus distribution in sequentially extracted fractions in tropical coffee-agroecosystems in the Atlantic Forest biome, Southeastern Brazil. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
Nutrient Cycling in Agroecosystems, 2011, v. 89, n. 1, p. 31-44. |
Idioma: |
Inglês |
Conteúdo: |
Phosphorus (P) deficiency is one of the most important constraints to food production, particularly in tropical Oxisols. This study aimed to characterize the inorganic and organic P (Pi and Po) fractions in the soil in three smallholding coffee cultivation fields managed under either agroforestry (AGF) or full sun (FSC) agroecosystems. The work was carried out in areas situated at the municipalities of Divino and Araponga in the Zona da Mata in the state of Minas Gerais, southeastern Brazil. Soil P forms including H2O-Pi; NaHCO3-Pi,Po; NaOH-Pi,Po; diluted Cl-Pi; concentrate HCl-Pi,Po and Residual-P were sequentially extracted in samples from 0 to 5 and 5 to 10-cm soil layers. Together, H2O-Pi and NaHCO3-Pi accounted on average for only 4% of soil total P in the cultivated soils. HClconc.-Pi ranged from 142.8 to 372.4 mg kg-1 being the predominant Pi fraction. AGF systems promoted an increment of 8% in the NaHCO3-Po fraction in relation to the FSC systems in the upper soil layer. The AGF systems increased HClconc.-Po pool in relation to the FSC systems in Divino and Araponga(I) soils, indicating that agroforestry is an important management strategy to increase bioavailable P and for the maintenance of organic P pool. The distribution of inorganic and organic P pools varied among the different study sites, showing that P cycling depends on the inherent characteristic of each agroecosystem. The availability of P to plants in coffee-agroforestry fields is directly associated with the cycling of the organic P pool. MenosPhosphorus (P) deficiency is one of the most important constraints to food production, particularly in tropical Oxisols. This study aimed to characterize the inorganic and organic P (Pi and Po) fractions in the soil in three smallholding coffee cultivation fields managed under either agroforestry (AGF) or full sun (FSC) agroecosystems. The work was carried out in areas situated at the municipalities of Divino and Araponga in the Zona da Mata in the state of Minas Gerais, southeastern Brazil. Soil P forms including H2O-Pi; NaHCO3-Pi,Po; NaOH-Pi,Po; diluted Cl-Pi; concentrate HCl-Pi,Po and Residual-P were sequentially extracted in samples from 0 to 5 and 5 to 10-cm soil layers. Together, H2O-Pi and NaHCO3-Pi accounted on average for only 4% of soil total P in the cultivated soils. HClconc.-Pi ranged from 142.8 to 372.4 mg kg-1 being the predominant Pi fraction. AGF systems promoted an increment of 8% in the NaHCO3-Po fraction in relation to the FSC systems in the upper soil layer. The AGF systems increased HClconc.-Po pool in relation to the FSC systems in Divino and Araponga(I) soils, indicating that agroforestry is an important management strategy to increase bioavailable P and for the maintenance of organic P pool. The distribution of inorganic and organic P pools varied among the different study sites, showing that P cycling depends on the inherent characteristic of each agroecosystem. The availability of P to plants in coffee-agroforestry fields is directly associated wit... Mostrar Tudo |
Palavras-Chave: |
Atlantic Forest biome; Biological P cycle. |
Thesaurus NAL: |
soil. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02192naa a2200193 a 4500 001 1910908 005 2023-05-26 008 2011 bl uuuu u00u1 u #d 100 1 $aXAVIER, F. A. da S. 245 $aSoil phosphorus distribution in sequentially extracted fractions in tropical coffee-agroecosystems in the Atlantic Forest biome, Southeastern Brazil.$h[electronic resource] 260 $c2011 520 $aPhosphorus (P) deficiency is one of the most important constraints to food production, particularly in tropical Oxisols. This study aimed to characterize the inorganic and organic P (Pi and Po) fractions in the soil in three smallholding coffee cultivation fields managed under either agroforestry (AGF) or full sun (FSC) agroecosystems. The work was carried out in areas situated at the municipalities of Divino and Araponga in the Zona da Mata in the state of Minas Gerais, southeastern Brazil. Soil P forms including H2O-Pi; NaHCO3-Pi,Po; NaOH-Pi,Po; diluted Cl-Pi; concentrate HCl-Pi,Po and Residual-P were sequentially extracted in samples from 0 to 5 and 5 to 10-cm soil layers. Together, H2O-Pi and NaHCO3-Pi accounted on average for only 4% of soil total P in the cultivated soils. HClconc.-Pi ranged from 142.8 to 372.4 mg kg-1 being the predominant Pi fraction. AGF systems promoted an increment of 8% in the NaHCO3-Po fraction in relation to the FSC systems in the upper soil layer. The AGF systems increased HClconc.-Po pool in relation to the FSC systems in Divino and Araponga(I) soils, indicating that agroforestry is an important management strategy to increase bioavailable P and for the maintenance of organic P pool. The distribution of inorganic and organic P pools varied among the different study sites, showing that P cycling depends on the inherent characteristic of each agroecosystem. The availability of P to plants in coffee-agroforestry fields is directly associated with the cycling of the organic P pool. 650 $asoil 653 $aAtlantic Forest biome 653 $aBiological P cycle 700 1 $aALMEIDA, E. F. 700 1 $aCARDOSO, I. M. 700 1 $aMENDONCA, E. de S. 773 $tNutrient Cycling in Agroecosystems, 2011$gv. 89, n. 1, p. 31-44.
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