Comparing methods for determination of clay contents in different Brazilian soils

Detalhes bibliográficos
Autor(a) principal: Cunha , Gabriel Octávio de Mello
Data de Publicação: 2014
Outros Autores: de Almeida , Jaime Antonio, Barboza , Bethina Bastos, Friederichs , Augusto, Rech , Cleber, Heberle , Daniel Alexandre, Grohskopf , Marco André
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Gaúcha (Online)
Texto Completo: http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/101
Resumo: Soil texture refers to the relative proportions of various particle sizes of soil (<2 mm diameter), which are expressed by conventional textural classes defined by different combinations of clay, silt and sand. The study was carried out at the Laboratory of Soils Genesis and Mineralogy of the Universidade do Estado de Santa Catarina, in Lages, SC using samples from two horizons (A and B) of twelve soil profiles from five Brazilian states (Acre, Bahia, Pernambuco, Rio Grande do Sul e Santa Catarina).The dispersion of the soil samples was done by sodium hydroxide (NaOH) for most soil and with calgon for soils with high levels of Ca2+ and Mg2+. Those soils showed problems to disperse particles with NaOH 1 mol L-1  solution. The results indicated that the hydrometer method tended to slightly overestimate the clay content, mainly in subsurface horizons, whereas for pipette method there were no differences for most soils, more precisely in topsoils horizons, when they were compared with weighing method.
id SEAPDR_b34d98c88f31efe81b9d783ffb532c6c
oai_identifier_str oai:ojs.revistapag.agricultura.rs.gov.br:article/101
network_acronym_str SEAPDR
network_name_str Pesquisa Agropecuária Gaúcha (Online)
repository_id_str
spelling Comparing methods for determination of clay contents in different Brazilian soilsComparação de métodos de determinação de argila em diferentes solos brasileirosParticle size analysisSoil textureChemical dispersantsAnálise granulométricaTextura do soloDispersantes químicosSoil texture refers to the relative proportions of various particle sizes of soil (<2 mm diameter), which are expressed by conventional textural classes defined by different combinations of clay, silt and sand. The study was carried out at the Laboratory of Soils Genesis and Mineralogy of the Universidade do Estado de Santa Catarina, in Lages, SC using samples from two horizons (A and B) of twelve soil profiles from five Brazilian states (Acre, Bahia, Pernambuco, Rio Grande do Sul e Santa Catarina).The dispersion of the soil samples was done by sodium hydroxide (NaOH) for most soil and with calgon for soils with high levels of Ca2+ and Mg2+. Those soils showed problems to disperse particles with NaOH 1 mol L-1  solution. The results indicated that the hydrometer method tended to slightly overestimate the clay content, mainly in subsurface horizons, whereas for pipette method there were no differences for most soils, more precisely in topsoils horizons, when they were compared with weighing method.A textura do solo refere-se à proporção relativa das diversas frações granulométricas do solo (< 2 mm de diâmetro), a qual é expressa pelas classes texturais convencionais, definidas por diferentes combinações de argila, silte e areia. O trabalho teve como objetivo comparar os teores de argila determinados pelos métodos da pesagem e do densímetro “simplificado” com o método da pipeta, tomado como padrão (testemunha). O estudo foi conduzido no Laboratório de Gênese e Mineralogia do Solo da Universidade do Estado de Santa Catarina, em Lages, SC, sendo utilizadas amostras de dois horizontes (A e B) de doze perfis de solo de cinco estados brasileiros (Acre, Bahia, Pernambuco, Rio Grande do Sul e Santa Catarina). A dispersão das amostras dos solos foi realizada com hidróxido de sódio (NaOH) para a maioria dos solos, e com calgon, para os solos com elevados teores de Ca2+ e Mg2+ e que apresentaram problemas na dispersão com NaOH 1 mol L-1 . O método do densímetro tendeu a superestimar ligeiramente os teores de argila, principalmente nos horizontes subsuperficiais, enquanto que no da pipeta não houve diferença para a maioria dos solos, principalmente nos horizontes superficiais, quando ambos foram comparados ao método da pesagem.Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural2014-12-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/101Pesquisa Agropecuária Gaúcha; Vol 20 No 1/2 (2014): PESQ. AGROP. GAÚCHA; 121-130Pesquisa Agropecuária Gaúcha; v. 20 n. 1/2 (2014): PESQ. AGROP. GAÚCHA; 121-1302595-76860104-9070reponame:Pesquisa Agropecuária Gaúcha (Online)instname:Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sulinstacron:SEAPDRporhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/101/77Cunha , Gabriel Octávio de Mello de Almeida , Jaime Antonio Barboza , Bethina Bastos Friederichs , Augusto Rech , Cleber Heberle , Daniel Alexandre Grohskopf , Marco André info:eu-repo/semantics/openAccess2024-04-22T12:13:38Zoai:ojs.revistapag.agricultura.rs.gov.br:article/101Revistahttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapagPUBhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/oaipag@agricultura.rs.gov.br||2595-76860104-9070opendoar:2024-04-22T12:13:38Pesquisa Agropecuária Gaúcha (Online) - Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sulfalse
dc.title.none.fl_str_mv Comparing methods for determination of clay contents in different Brazilian soils
Comparação de métodos de determinação de argila em diferentes solos brasileiros
title Comparing methods for determination of clay contents in different Brazilian soils
spellingShingle Comparing methods for determination of clay contents in different Brazilian soils
Cunha , Gabriel Octávio de Mello
Particle size analysis
Soil texture
Chemical dispersants
Análise granulométrica
Textura do solo
Dispersantes químicos
title_short Comparing methods for determination of clay contents in different Brazilian soils
title_full Comparing methods for determination of clay contents in different Brazilian soils
title_fullStr Comparing methods for determination of clay contents in different Brazilian soils
title_full_unstemmed Comparing methods for determination of clay contents in different Brazilian soils
title_sort Comparing methods for determination of clay contents in different Brazilian soils
author Cunha , Gabriel Octávio de Mello
author_facet Cunha , Gabriel Octávio de Mello
de Almeida , Jaime Antonio
Barboza , Bethina Bastos
Friederichs , Augusto
Rech , Cleber
Heberle , Daniel Alexandre
Grohskopf , Marco André
author_role author
author2 de Almeida , Jaime Antonio
Barboza , Bethina Bastos
Friederichs , Augusto
Rech , Cleber
Heberle , Daniel Alexandre
Grohskopf , Marco André
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Cunha , Gabriel Octávio de Mello
de Almeida , Jaime Antonio
Barboza , Bethina Bastos
Friederichs , Augusto
Rech , Cleber
Heberle , Daniel Alexandre
Grohskopf , Marco André
dc.subject.por.fl_str_mv Particle size analysis
Soil texture
Chemical dispersants
Análise granulométrica
Textura do solo
Dispersantes químicos
topic Particle size analysis
Soil texture
Chemical dispersants
Análise granulométrica
Textura do solo
Dispersantes químicos
description Soil texture refers to the relative proportions of various particle sizes of soil (<2 mm diameter), which are expressed by conventional textural classes defined by different combinations of clay, silt and sand. The study was carried out at the Laboratory of Soils Genesis and Mineralogy of the Universidade do Estado de Santa Catarina, in Lages, SC using samples from two horizons (A and B) of twelve soil profiles from five Brazilian states (Acre, Bahia, Pernambuco, Rio Grande do Sul e Santa Catarina).The dispersion of the soil samples was done by sodium hydroxide (NaOH) for most soil and with calgon for soils with high levels of Ca2+ and Mg2+. Those soils showed problems to disperse particles with NaOH 1 mol L-1  solution. The results indicated that the hydrometer method tended to slightly overestimate the clay content, mainly in subsurface horizons, whereas for pipette method there were no differences for most soils, more precisely in topsoils horizons, when they were compared with weighing method.
publishDate 2014
dc.date.none.fl_str_mv 2014-12-31
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/101
url http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/101
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/101/77
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural
publisher.none.fl_str_mv Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural
dc.source.none.fl_str_mv Pesquisa Agropecuária Gaúcha; Vol 20 No 1/2 (2014): PESQ. AGROP. GAÚCHA; 121-130
Pesquisa Agropecuária Gaúcha; v. 20 n. 1/2 (2014): PESQ. AGROP. GAÚCHA; 121-130
2595-7686
0104-9070
reponame:Pesquisa Agropecuária Gaúcha (Online)
instname:Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
instacron:SEAPDR
instname_str Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
instacron_str SEAPDR
institution SEAPDR
reponame_str Pesquisa Agropecuária Gaúcha (Online)
collection Pesquisa Agropecuária Gaúcha (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Gaúcha (Online) - Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
repository.mail.fl_str_mv pag@agricultura.rs.gov.br||
_version_ 1797068771606659072

Registros relacionados