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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrossilvipastoril. Para informações adicionais entre em contato com cpamt.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrossilvipastoril; Embrapa Solos. |
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Data corrente: |
17/01/2020 |
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Data da última atualização: |
04/02/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SOUSA, J. E. S. de; SANTOS, J. C. B. dos; CORRÊA, M. M.; NASCIMENTO, A. F. do; SCHULZE, S. M. B. B.; FERREIRA, T. O.; ARAUJO FILHO, J. C. de; SOUZA JÚNIOR, V. S. de. |
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Afiliação: |
JULIET EMÍLIA SANTOS DE SOUSA, UFRPE; JEAN CHEYSON BARROS DOS SANTOS, UFRPE; MARCELO METRI CORRÊA, UFRPE; ALEXANDRE FERREIRA DO NASCIMENTO, CPAMT; SHEILA MARIA BRETAS BITTAR SCHULZE, UFRPE; TIAGO OSÓRIO FERREIRA, USP; JOSE COELHO DE ARAUJO FILHO, CNPS; VALDOMIRO SEVERINO DE SOUZA JÚNIOR, UFRPE. |
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Título: |
Mineralogy and genesis of Planosols under a semi-arid climate, Borborema Plateau, NE Brazil. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Catena, v. 184, 104260, Jan. 2020. |
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DOI: |
10.1016/j.catena.2019.104260 |
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Idioma: |
Inglês |
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Conteúdo: |
Planosols, such as those found on the Borborema Plateau, NE Brazil, form an important class of moderately weathered soils that support subsistence agriculture in underdeveloped regions of Africa, Asia, and South America. Despite its socioeconomic importance, the genesis of this soil class has not yet been fully elucidated. This study was conducted with the aim of improving knowledge about the genesis of Planosols under a semi-arid climate. Three Planosol profiles on the Borborema Plateau in NE Brazil were collected, classified, and described morphologically, and the main physical and chemical attributes, the pedogenetic forms of iron oxides, and the mineralogical compositions of the sand, silt, and clay fractions were determined. The results indicate that: (a) parent materials richer in feldspar and biotite favor the formation of Planosols with a higher clay content; (b) the dissolution of primary minerals and the formation of clay minerals (known as the argillation process) are fundamental for the genesis of Bt horizons; (c) depth-drainage deficiency leads to hydromorphism, an associated gray color, and the formation of mottles; and (d) monosialitization and bisialitization processes (kaolinite formation and the formation of 2:1 clay minerals, respectively) prevail in Planosols located within landscape positions that have good and poor drainage, respectively. In addition, the present study shows that Planosols under a semi-arid climate can have a clay fraction consisting predominantly of kaolinite, and mineralogical alteration pathways similar to those described in soils under an analogous climate and geology in Northwest Africa; this refutes classical theories that soils with 2:1 clay minerals prevail in warmer and drier regions. This study thus provides greater knowledge about the attributes of Planosols in dry and poor regions and can be used as a reference in studies on the sustainable use and management of such soils. MenosPlanosols, such as those found on the Borborema Plateau, NE Brazil, form an important class of moderately weathered soils that support subsistence agriculture in underdeveloped regions of Africa, Asia, and South America. Despite its socioeconomic importance, the genesis of this soil class has not yet been fully elucidated. This study was conducted with the aim of improving knowledge about the genesis of Planosols under a semi-arid climate. Three Planosol profiles on the Borborema Plateau in NE Brazil were collected, classified, and described morphologically, and the main physical and chemical attributes, the pedogenetic forms of iron oxides, and the mineralogical compositions of the sand, silt, and clay fractions were determined. The results indicate that: (a) parent materials richer in feldspar and biotite favor the formation of Planosols with a higher clay content; (b) the dissolution of primary minerals and the formation of clay minerals (known as the argillation process) are fundamental for the genesis of Bt horizons; (c) depth-drainage deficiency leads to hydromorphism, an associated gray color, and the formation of mottles; and (d) monosialitization and bisialitization processes (kaolinite formation and the formation of 2:1 clay minerals, respectively) prevail in Planosols located within landscape positions that have good and poor drainage, respectively. In addition, the present study shows that Planosols under a semi-arid climate can have a clay fraction consisting pr... Mostrar Tudo |
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Palavras-Chave: |
Caulinita; Esmectita. |
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Thesagro: |
Argila; Hidrolise; Mineralogia. |
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Thesaurus NAL: |
Clay; Hydrolysis; Kaolinite; Mineralogy; Smectite. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02893naa a2200337 a 4500
001 2119821
005 2020-02-04
008 2020 bl uuuu u00u1 u #d
024 7 $a10.1016/j.catena.2019.104260$2DOI
100 1 $aSOUSA, J. E. S. de
245 $aMineralogy and genesis of Planosols under a semi-arid climate, Borborema Plateau, NE Brazil.$h[electronic resource]
260 $c2020
520 $aPlanosols, such as those found on the Borborema Plateau, NE Brazil, form an important class of moderately weathered soils that support subsistence agriculture in underdeveloped regions of Africa, Asia, and South America. Despite its socioeconomic importance, the genesis of this soil class has not yet been fully elucidated. This study was conducted with the aim of improving knowledge about the genesis of Planosols under a semi-arid climate. Three Planosol profiles on the Borborema Plateau in NE Brazil were collected, classified, and described morphologically, and the main physical and chemical attributes, the pedogenetic forms of iron oxides, and the mineralogical compositions of the sand, silt, and clay fractions were determined. The results indicate that: (a) parent materials richer in feldspar and biotite favor the formation of Planosols with a higher clay content; (b) the dissolution of primary minerals and the formation of clay minerals (known as the argillation process) are fundamental for the genesis of Bt horizons; (c) depth-drainage deficiency leads to hydromorphism, an associated gray color, and the formation of mottles; and (d) monosialitization and bisialitization processes (kaolinite formation and the formation of 2:1 clay minerals, respectively) prevail in Planosols located within landscape positions that have good and poor drainage, respectively. In addition, the present study shows that Planosols under a semi-arid climate can have a clay fraction consisting predominantly of kaolinite, and mineralogical alteration pathways similar to those described in soils under an analogous climate and geology in Northwest Africa; this refutes classical theories that soils with 2:1 clay minerals prevail in warmer and drier regions. This study thus provides greater knowledge about the attributes of Planosols in dry and poor regions and can be used as a reference in studies on the sustainable use and management of such soils.
650 $aClay
650 $aHydrolysis
650 $aKaolinite
650 $aMineralogy
650 $aSmectite
650 $aArgila
650 $aHidrolise
650 $aMineralogia
653 $aCaulinita
653 $aEsmectita
700 1 $aSANTOS, J. C. B. dos
700 1 $aCORRÊA, M. M.
700 1 $aNASCIMENTO, A. F. do
700 1 $aSCHULZE, S. M. B. B.
700 1 $aFERREIRA, T. O.
700 1 $aARAUJO FILHO, J. C. de
700 1 $aSOUZA JÚNIOR, V. S. de
773 $tCatena$gv. 184, 104260, Jan. 2020.
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