Characterization and classification of floodplain soils in the Porto Alegre metropolitan region, RS, Brazil

Detalhes bibliográficos
Autor(a) principal: Silva Neto, Luís de França da
Data de Publicação: 2015
Outros Autores: Inda, Alberto Vasconcellos, Nascimento, Paulo César Do, Giasson, Elvio, Schmitt, Catiline, Curi, Nilton
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/45874
Resumo: In the Porto Alegre metropolitan region (PAMR) there are a significant proportion of floodplain soils, mainly Planosols and Gleysols, in relation to upland soils. This study aimed to evaluate the morphological, chemical and physical characteristics, and to classify floodplain soils in the PAMR. Six soil profiles were evaluated under different sedimentary lithologies and drainage classes, and samples were collected for chemical and physical analyzes. Two orders of mineral soils (Planosols and Gleysols) and one order of organic soil (Organosols) were identified. The soils were moderately deep to deep and stratified. In mineral soils hue ranged between 7.5YR and 2.5Y, with the occurrence of Bg, Btg or Cg gley horizons, while in organic soil the colors were neutral. Sand and silt were the predominant particle sizes according to the origin sedimentary deposits. The organic carbon content was negatively related to soil density and positively related to soil specific surface area and with soil cation exchange capacity. Soil chemical characterization showed expressive variation in bases, aluminum and sodium saturation. Ki index and Fe(CBD)/Fe(H2SO4) ratio indicated a low soil weathering degree. The different sedimentary lithologies and the soil hydromorphism degree were the main factors related to differences in morphological, physical and chemical characteristics of soils in the PAMR.
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spelling Characterization and classification of floodplain soils in the Porto Alegre metropolitan region, RS, BrazilCaracterização e classificação de solos de várzea na região metropolitana de Porto Alegre, RSHydromorphic soilsQuaternary sedimentsSpecific surface areaSolos hidromórficosSedimentos quaternáriosÁrea superficial específicaIn the Porto Alegre metropolitan region (PAMR) there are a significant proportion of floodplain soils, mainly Planosols and Gleysols, in relation to upland soils. This study aimed to evaluate the morphological, chemical and physical characteristics, and to classify floodplain soils in the PAMR. Six soil profiles were evaluated under different sedimentary lithologies and drainage classes, and samples were collected for chemical and physical analyzes. Two orders of mineral soils (Planosols and Gleysols) and one order of organic soil (Organosols) were identified. The soils were moderately deep to deep and stratified. In mineral soils hue ranged between 7.5YR and 2.5Y, with the occurrence of Bg, Btg or Cg gley horizons, while in organic soil the colors were neutral. Sand and silt were the predominant particle sizes according to the origin sedimentary deposits. The organic carbon content was negatively related to soil density and positively related to soil specific surface area and with soil cation exchange capacity. Soil chemical characterization showed expressive variation in bases, aluminum and sodium saturation. Ki index and Fe(CBD)/Fe(H2SO4) ratio indicated a low soil weathering degree. The different sedimentary lithologies and the soil hydromorphism degree were the main factors related to differences in morphological, physical and chemical characteristics of soils in the PAMR.Na região metropolitana de Porto Alegre (PAMR) é expressiva a proporção de solos de várzea em relação aos solos de terras altas, com predomínio de Planossolos e Gleissolos. Este estudo objetivou caracterizar a morfologia, a física e a química, e classificar taxonomicamente solos em posições de várzea na PAMR. Foram abertas seis trincheiras em relevo plano, sob diferentes litologias sedimentares e classes de drenagem,onde foram realizadas a descrição morfológica dos perfis de solos e a coleta de amostras para as análises físicas e químicas.Foram identificadas duas ordens de solos minerais (Gleissolo e Planossolo) e uma orgânica (Organossolo). Os solos foram moderadamente profundos a profundos e estratificados. Nos solos minerais a matiz variou entre 7,5YR e 2,5Y, com ocorrência de horizontes gleizados Bg, Btg ou Cg, enquanto no Organossolo as cores foram neutras. A granulometria dos solos, com predominância das frações areia e silte, variou conforme os depósitos sedimentares de origem. A expressiva amplitude dos teores de C orgânico mostrou relação negativa coma densidade do solo, e positiva com a área superficial específica e a capacidade de troca de cátions. Os atributos químicos também se mostraram discriminantes entre os solos avaliados, com ocorrência de distrofismo e eutrofismo, variações amplas dos teores de Al3+ trocável e ocorrência de caráter solódico. Nos solos minerais o índice Ki e a relação Fe(CBD)/Fe(H2SO4) indicaram um grau incipiente de desenvolvimento dos solos. O material de origem e o grau de hidromorfismo foram os principais fatores responsáveis pelas diferenças nas características morfológicas, físicas e químicas dos solos na PAMR.Universidade Federal de Lavras2020-12-15T19:49:57Z2020-12-15T19:49:57Z2015info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfSILVA NETO, L. de F. da et al. Characterization and classification of floodplain soils in the Porto Alegre metropolitan region, RS, Brazil. Ciência e Agrotecnologia, Lavras, v. 39, n. 5, p. 423-434, Sept./Oct. 2015. DOI: http://dx.doi.org/10.1590/S1413-70542015000500001.http://repositorio.ufla.br/jspui/handle/1/45874Ciência e Agrotecnologiareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessSilva Neto, Luís de França daInda, Alberto VasconcellosNascimento, Paulo César DoGiasson, ElvioSchmitt, CatilineCuri, Niltoneng2020-12-15T19:50:34Zoai:localhost:1/45874Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2020-12-15T19:50:34Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Characterization and classification of floodplain soils in the Porto Alegre metropolitan region, RS, Brazil
Caracterização e classificação de solos de várzea na região metropolitana de Porto Alegre, RS
title Characterization and classification of floodplain soils in the Porto Alegre metropolitan region, RS, Brazil
spellingShingle Characterization and classification of floodplain soils in the Porto Alegre metropolitan region, RS, Brazil
Silva Neto, Luís de França da
Hydromorphic soils
Quaternary sediments
Specific surface area
Solos hidromórficos
Sedimentos quaternários
Área superficial específica
title_short Characterization and classification of floodplain soils in the Porto Alegre metropolitan region, RS, Brazil
title_full Characterization and classification of floodplain soils in the Porto Alegre metropolitan region, RS, Brazil
title_fullStr Characterization and classification of floodplain soils in the Porto Alegre metropolitan region, RS, Brazil
title_full_unstemmed Characterization and classification of floodplain soils in the Porto Alegre metropolitan region, RS, Brazil
title_sort Characterization and classification of floodplain soils in the Porto Alegre metropolitan region, RS, Brazil
author Silva Neto, Luís de França da
author_facet Silva Neto, Luís de França da
Inda, Alberto Vasconcellos
Nascimento, Paulo César Do
Giasson, Elvio
Schmitt, Catiline
Curi, Nilton
author_role author
author2 Inda, Alberto Vasconcellos
Nascimento, Paulo César Do
Giasson, Elvio
Schmitt, Catiline
Curi, Nilton
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Silva Neto, Luís de França da
Inda, Alberto Vasconcellos
Nascimento, Paulo César Do
Giasson, Elvio
Schmitt, Catiline
Curi, Nilton
dc.subject.por.fl_str_mv Hydromorphic soils
Quaternary sediments
Specific surface area
Solos hidromórficos
Sedimentos quaternários
Área superficial específica
topic Hydromorphic soils
Quaternary sediments
Specific surface area
Solos hidromórficos
Sedimentos quaternários
Área superficial específica
description In the Porto Alegre metropolitan region (PAMR) there are a significant proportion of floodplain soils, mainly Planosols and Gleysols, in relation to upland soils. This study aimed to evaluate the morphological, chemical and physical characteristics, and to classify floodplain soils in the PAMR. Six soil profiles were evaluated under different sedimentary lithologies and drainage classes, and samples were collected for chemical and physical analyzes. Two orders of mineral soils (Planosols and Gleysols) and one order of organic soil (Organosols) were identified. The soils were moderately deep to deep and stratified. In mineral soils hue ranged between 7.5YR and 2.5Y, with the occurrence of Bg, Btg or Cg gley horizons, while in organic soil the colors were neutral. Sand and silt were the predominant particle sizes according to the origin sedimentary deposits. The organic carbon content was negatively related to soil density and positively related to soil specific surface area and with soil cation exchange capacity. Soil chemical characterization showed expressive variation in bases, aluminum and sodium saturation. Ki index and Fe(CBD)/Fe(H2SO4) ratio indicated a low soil weathering degree. The different sedimentary lithologies and the soil hydromorphism degree were the main factors related to differences in morphological, physical and chemical characteristics of soils in the PAMR.
publishDate 2015
dc.date.none.fl_str_mv 2015
2020-12-15T19:49:57Z
2020-12-15T19:49:57Z
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 SILVA NETO, L. de F. da et al. Characterization and classification of floodplain soils in the Porto Alegre metropolitan region, RS, Brazil. Ciência e Agrotecnologia, Lavras, v. 39, n. 5, p. 423-434, Sept./Oct. 2015. DOI: http://dx.doi.org/10.1590/S1413-70542015000500001.
http://repositorio.ufla.br/jspui/handle/1/45874
identifier_str_mv SILVA NETO, L. de F. da et al. Characterization and classification of floodplain soils in the Porto Alegre metropolitan region, RS, Brazil. Ciência e Agrotecnologia, Lavras, v. 39, n. 5, p. 423-434, Sept./Oct. 2015. DOI: http://dx.doi.org/10.1590/S1413-70542015000500001.
url http://repositorio.ufla.br/jspui/handle/1/45874
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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