Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais - Brazil

Detalhes bibliográficos
Autor(a) principal: Gonçalves, Mariana Gabriele Marcolino
Data de Publicação: 2019
Outros Autores: Ker, João Carlos, Oliveira, Fábio Soares de, Ramos, Letícia Onara Silva, Pacheco, Anderson Almeida, Curi, Nilton
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/41303
Resumo: Soils of the semi-arid region of Minas Gerais have small depth; hard, very hard or even extremely hard consistency when dry and very plastic and very sticky when moist; columnar or angular blocky structure and significant cracking along the profile in the dry period, however they have not been deeply studied yet. Thus, the aim of this study was to detail the genesis of Luvisols in the Semi-arid Depression of the Jequitinhonha Valley (MG), incompassing morphological, physical, chemical, micromorphological and mineralogical attributes, and their relationships. The lack of illuviation coatings in the micromorphological analysis is in line with the expressionless and unclear clay skins observed in the top of the B horizon in only one out of the four soil profiles during the field work. Considering the occurrence of expandable 2:1 clay minerals, which can easily modify such pedological feature, caution is recommended in relation to soil genesis interpretation. The lateral loss of the clay fraction from the superficial horizons is highlighted as the main formation process of the Luvisols studied. The cation exchange capacity of these soils revealed remarkable lower values for the Luvisols in semi-arid Brazilian regions.
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spelling Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais - BrazilPerda lateral de argila na gênese de Luvissolos na Depressão Semiárida do Vale do Jequitinhonha, Minas Gerais - BrasilSoil mineralogyCation exchange capacitySoil micromorphologyMineralogia do soloCapacidade de troca de cátionsMicromorfologia do soloSoils of the semi-arid region of Minas Gerais have small depth; hard, very hard or even extremely hard consistency when dry and very plastic and very sticky when moist; columnar or angular blocky structure and significant cracking along the profile in the dry period, however they have not been deeply studied yet. Thus, the aim of this study was to detail the genesis of Luvisols in the Semi-arid Depression of the Jequitinhonha Valley (MG), incompassing morphological, physical, chemical, micromorphological and mineralogical attributes, and their relationships. The lack of illuviation coatings in the micromorphological analysis is in line with the expressionless and unclear clay skins observed in the top of the B horizon in only one out of the four soil profiles during the field work. Considering the occurrence of expandable 2:1 clay minerals, which can easily modify such pedological feature, caution is recommended in relation to soil genesis interpretation. The lateral loss of the clay fraction from the superficial horizons is highlighted as the main formation process of the Luvisols studied. The cation exchange capacity of these soils revealed remarkable lower values for the Luvisols in semi-arid Brazilian regions.Os solos da região semi-árida de Minas Gerais possuem pequena profundidade; consistência dura, muito dura ou mesmo extremamente dura quando seca e muito plástica e muito pegajosa quando úmida; estrutura colunar ou em blocos angulares e fendilhamento significativo ao longo do perfil no período seco, entretanto eles não foram profundamente estudados até agora. Assim, o objetivo deste estudo foi detalhar a gênese dos Luvissolos da Depressão Semi-árida do Vale do Jequitinhonha (MG), a partir de atributos morfológicos, físicos, químicos, micromorfológicos e mineralógicos, e suas relações. A ausência de cutãs de iluviação na análise micromorfológica em laboratório foi consistente com a fraca e pouca cerosidade observada no topo do horizonte B de apenas um dos quatro perfis de solo estudados durante os trabalhos de campo. Considerando a ocorrência de argilominerais 2:1 expansíveis, os quais podem facilmente modificar tal feição pedológica, cautela é recomendada com relação à interpretação da gênese do solo. Desta maneira, a perda lateral de argila dos horizontes superficiais é enfatizada como o principal processo de formação dos Luvissolos estudados. A capacidade de troca de cátions desses solos revelou valores diferencialmente mais baixos para Luvissolos em regiões semi-áridas brasileiras.Universidade Federal de Lavras2020-06-01T16:53:23Z2020-06-01T16:53:23Z2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfGONÇALVES, M. G. M. et al. Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais – Brazil. Ciência e Agrotecnologia, Lavras, v. 43, 2019. Paginação irregular.http://repositorio.ufla.br/jspui/handle/1/41303Ciência e Agrotecnologiareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessGonçalves, Mariana Gabriele MarcolinoKer, João CarlosOliveira, Fábio Soares deRamos, Letícia Onara SilvaPacheco, Anderson AlmeidaCuri, Niltoneng2020-06-01T16:55:17Zoai:localhost:1/41303Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2020-06-01T16:55:17Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais - Brazil
Perda lateral de argila na gênese de Luvissolos na Depressão Semiárida do Vale do Jequitinhonha, Minas Gerais - Brasil
title Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais - Brazil
spellingShingle Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais - Brazil
Gonçalves, Mariana Gabriele Marcolino
Soil mineralogy
Cation exchange capacity
Soil micromorphology
Mineralogia do solo
Capacidade de troca de cátions
Micromorfologia do solo
title_short Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais - Brazil
title_full Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais - Brazil
title_fullStr Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais - Brazil
title_full_unstemmed Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais - Brazil
title_sort Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais - Brazil
author Gonçalves, Mariana Gabriele Marcolino
author_facet Gonçalves, Mariana Gabriele Marcolino
Ker, João Carlos
Oliveira, Fábio Soares de
Ramos, Letícia Onara Silva
Pacheco, Anderson Almeida
Curi, Nilton
author_role author
author2 Ker, João Carlos
Oliveira, Fábio Soares de
Ramos, Letícia Onara Silva
Pacheco, Anderson Almeida
Curi, Nilton
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Gonçalves, Mariana Gabriele Marcolino
Ker, João Carlos
Oliveira, Fábio Soares de
Ramos, Letícia Onara Silva
Pacheco, Anderson Almeida
Curi, Nilton
dc.subject.por.fl_str_mv Soil mineralogy
Cation exchange capacity
Soil micromorphology
Mineralogia do solo
Capacidade de troca de cátions
Micromorfologia do solo
topic Soil mineralogy
Cation exchange capacity
Soil micromorphology
Mineralogia do solo
Capacidade de troca de cátions
Micromorfologia do solo
description Soils of the semi-arid region of Minas Gerais have small depth; hard, very hard or even extremely hard consistency when dry and very plastic and very sticky when moist; columnar or angular blocky structure and significant cracking along the profile in the dry period, however they have not been deeply studied yet. Thus, the aim of this study was to detail the genesis of Luvisols in the Semi-arid Depression of the Jequitinhonha Valley (MG), incompassing morphological, physical, chemical, micromorphological and mineralogical attributes, and their relationships. The lack of illuviation coatings in the micromorphological analysis is in line with the expressionless and unclear clay skins observed in the top of the B horizon in only one out of the four soil profiles during the field work. Considering the occurrence of expandable 2:1 clay minerals, which can easily modify such pedological feature, caution is recommended in relation to soil genesis interpretation. The lateral loss of the clay fraction from the superficial horizons is highlighted as the main formation process of the Luvisols studied. The cation exchange capacity of these soils revealed remarkable lower values for the Luvisols in semi-arid Brazilian regions.
publishDate 2019
dc.date.none.fl_str_mv 2019
2020-06-01T16:53:23Z
2020-06-01T16:53:23Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv GONÇALVES, M. G. M. et al. Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais – Brazil. Ciência e Agrotecnologia, Lavras, v. 43, 2019. Paginação irregular.
http://repositorio.ufla.br/jspui/handle/1/41303
identifier_str_mv GONÇALVES, M. G. M. et al. Lateral loss of clay in the genesis of Luvisols in the Semi-Arid Depression of the Jequitinhonha Valley, Minas Gerais – Brazil. Ciência e Agrotecnologia, Lavras, v. 43, 2019. Paginação irregular.
url http://repositorio.ufla.br/jspui/handle/1/41303
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Lavras
publisher.none.fl_str_mv Universidade Federal de Lavras
dc.source.none.fl_str_mv Ciência e Agrotecnologia
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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