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102. | | MENDES, J. E.; CAMARGO, E. R.; SOUSA, C. P.; PESSOA, J. D. C. Caracterização de nanopartículas de prata pela técnica de espalhamento de luz dinâmico (DLS). In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 8, 2014, Juiz de fora. Anais... São Carlos: Embrapa Instrumentação; Campo Grande: Embrapa Gado de Corte; Juiz de Fora: Embrapa Gado de Leite, 2014. p. 451-454. Editores: Maria Alice Martins, Humberto de Mello Brandão, Marlene de Barros Coelho, Daniel Souza Corrêa, Caue Ribeiro, Luiz Henrique Capparelli Mattoso. Biblioteca(s): Embrapa Instrumentação. |
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Registro Completo
Biblioteca(s): |
Embrapa Florestas; Embrapa Milho e Sorgo. |
Data corrente: |
13/07/2022 |
Data da última atualização: |
14/07/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
SILVA, L. de C. M. da; PEIXOTO, D. S.; GOMES, J. B. V.; AVANZI, J. C.; AMORIM, R. S. S.; BORGHI, E.; RESENDE, A. V. de; SILVA, B. M.; MANCINI, M.; CURI, N. |
Afiliação: |
LUCAS DE CASTRO MOREIRA DA SILVA, Universidade Federal de Viçosa; DEVISON SOUZA PEIXOTO, Universidade Federal de Lavras; JOAO BOSCO VASCONCELLOS GOMES, CNPF; JUNIOR CESAR AVANZI, Universidade Federal de Lavras; RICARDO SANTOS SILVA AMORIM, Universidade Federal de Viçosa; EMERSON BORGHI, CNPMS; ALVARO VILELA DE RESENDE, CNPMS; BRUNO MONTOANI SILVA, Universidade Federal de Lavras; MARCELO MANCINI, Universidade Federal de Lavras; NEWTON CURI, Universidade Federal de Lavras. |
Título: |
Mineralogy and pore size distribution of clayey Oxisols with granular structure and the effect of management systems. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Soil & Tillage Research, v. 223, 105479, 2022. |
DOI: |
https://doi.org/10.1016/j.still.2022.105479 |
Idioma: |
Inglês |
Conteúdo: |
There is a general consensus in the tropical literature on the crucial role played by clay mineralogy in the formation of the very stable granular structure of Oxisols, which has been mainly attributed to gibbsite. Gibbsite hinders the face-to-face adjustment of kaolinite plates responsible for the very common block structure. While kaolinite predominates in the clay fraction of most Oxisols, gibbsite occurs in variable contents. Studies have reported that the granular structure is secondarily associated to goethite and hematite, soil organic matter and biological activity. However, the variation of clay mineralogy on the alteration of the pore size distribution of clayey Oxisols with granular structure remains unclear. So, the main aim of this work was to study several granular Oxisols from the Brazilian Cerrado biome, under native vegetation, with clayey texture and variable clay mineralogy, focusing on the influence of the latter on pore size distribution and related physical and hydric attributes, and to assess how these attributes are affected by management practices. Results showed that greater contents of gibbsite led to an increase in the micropores/total pores ratio and a higher frequency of smaller pores distribution. Low mesoporosity and water availability values were common in the studied Oxisols. A case study was conducted to evaluate the influence of management practices in physical and hydric attributes when such soils are incorporated to agricultural production systems. Overall, clayey Oxisols with similar granular structure can have distinguishing physical and hydric environments and soil management systems may constitute important strategies to overcome the intrinsic low water availability of these soils. MenosThere is a general consensus in the tropical literature on the crucial role played by clay mineralogy in the formation of the very stable granular structure of Oxisols, which has been mainly attributed to gibbsite. Gibbsite hinders the face-to-face adjustment of kaolinite plates responsible for the very common block structure. While kaolinite predominates in the clay fraction of most Oxisols, gibbsite occurs in variable contents. Studies have reported that the granular structure is secondarily associated to goethite and hematite, soil organic matter and biological activity. However, the variation of clay mineralogy on the alteration of the pore size distribution of clayey Oxisols with granular structure remains unclear. So, the main aim of this work was to study several granular Oxisols from the Brazilian Cerrado biome, under native vegetation, with clayey texture and variable clay mineralogy, focusing on the influence of the latter on pore size distribution and related physical and hydric attributes, and to assess how these attributes are affected by management practices. Results showed that greater contents of gibbsite led to an increase in the micropores/total pores ratio and a higher frequency of smaller pores distribution. Low mesoporosity and water availability values were common in the studied Oxisols. A case study was conducted to evaluate the influence of management practices in physical and hydric attributes when such soils are incorporated to agricultural producti... Mostrar Tudo |
Palavras-Chave: |
Agricultura conservacionista; Caulinita; Goethita; Hematita; Pseudo-areia; Pseudo-silte. |
Thesagro: |
Manejo do Solo; Solo Argiloso. |
Thesaurus NAL: |
Available water capacity; Gibbsite. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02810naa a2200361 a 4500 001 2144710 005 2022-07-14 008 2022 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.still.2022.105479$2DOI 100 1 $aSILVA, L. de C. M. da 245 $aMineralogy and pore size distribution of clayey Oxisols with granular structure and the effect of management systems.$h[electronic resource] 260 $c2022 520 $aThere is a general consensus in the tropical literature on the crucial role played by clay mineralogy in the formation of the very stable granular structure of Oxisols, which has been mainly attributed to gibbsite. Gibbsite hinders the face-to-face adjustment of kaolinite plates responsible for the very common block structure. While kaolinite predominates in the clay fraction of most Oxisols, gibbsite occurs in variable contents. Studies have reported that the granular structure is secondarily associated to goethite and hematite, soil organic matter and biological activity. However, the variation of clay mineralogy on the alteration of the pore size distribution of clayey Oxisols with granular structure remains unclear. So, the main aim of this work was to study several granular Oxisols from the Brazilian Cerrado biome, under native vegetation, with clayey texture and variable clay mineralogy, focusing on the influence of the latter on pore size distribution and related physical and hydric attributes, and to assess how these attributes are affected by management practices. Results showed that greater contents of gibbsite led to an increase in the micropores/total pores ratio and a higher frequency of smaller pores distribution. Low mesoporosity and water availability values were common in the studied Oxisols. A case study was conducted to evaluate the influence of management practices in physical and hydric attributes when such soils are incorporated to agricultural production systems. Overall, clayey Oxisols with similar granular structure can have distinguishing physical and hydric environments and soil management systems may constitute important strategies to overcome the intrinsic low water availability of these soils. 650 $aAvailable water capacity 650 $aGibbsite 650 $aManejo do Solo 650 $aSolo Argiloso 653 $aAgricultura conservacionista 653 $aCaulinita 653 $aGoethita 653 $aHematita 653 $aPseudo-areia 653 $aPseudo-silte 700 1 $aPEIXOTO, D. S. 700 1 $aGOMES, J. B. V. 700 1 $aAVANZI, J. C. 700 1 $aAMORIM, R. S. S. 700 1 $aBORGHI, E. 700 1 $aRESENDE, A. V. de 700 1 $aSILVA, B. M. 700 1 $aMANCINI, M. 700 1 $aCURI, N. 773 $tSoil & Tillage Research$gv. 223, 105479, 2022.
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