Phosphate adsorption in oxisols by humid brushland ( savannah)

Detalhes bibliográficos
Autor(a) principal: Leal, Jair Rocha
Data de Publicação: 2014
Outros Autores: Velloso, Ary Carlos X.
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/17410
Resumo: Adsorption of phosphate by nine oxisols collected in cerrados (savannah) of São Paulo and Goiás, showed a close relationship with the Langmuir isotherm. Calculated maximum adsorption (25°C; pH 5) for the nine soils varied from 23 to 70 mg P per hundred grams of soil. These maxima are intermediate among values found in the literature for other countries. The adsorption maxima were closely correlated with the amounts of amorphous aluminum oxides (r = 0,867), clay content (r = 0,938) and percentage organic matter (r = 0,922), respectively. Differences in exchangeable alumimum and differences in the amounts of amorphous iron oxides were not correlated with the adsorption maxima.
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spelling Phosphate adsorption in oxisols by humid brushland ( savannah)Adsorção de fosfato em latossolos sob vegetação de cerradoAdsorption of phosphate by nine oxisols collected in cerrados (savannah) of São Paulo and Goiás, showed a close relationship with the Langmuir isotherm. Calculated maximum adsorption (25°C; pH 5) for the nine soils varied from 23 to 70 mg P per hundred grams of soil. These maxima are intermediate among values found in the literature for other countries. The adsorption maxima were closely correlated with the amounts of amorphous aluminum oxides (r = 0,867), clay content (r = 0,938) and percentage organic matter (r = 0,922), respectively. Differences in exchangeable alumimum and differences in the amounts of amorphous iron oxides were not correlated with the adsorption maxima.A equação de Langmuir foi usada para o estudo das características de adsorção de fosfato de nove latossolos coletados em cerrados do Estado de São Paulo e Goiás, incluindo o Distrito Federal. Os solos foram equilibrados com soluções de KH2PO4 (25°C, pH = 5) de concentrações variando de 1 x 10-4 a 8 x 10-3 M, determinando-se o fosfato adsorvido pela diferença entre as concentrações inicial e final. Os valores de adsorção máxima, calculados a partir da isoterma de Langmuir, foram correlacionados com as características químicas e granulométricas dos solos. Correlações lineares altamente significativas foram obtidas com os teores de óxidos amorfos de alumínio (r = 0,867) e com as percentagens de argila (r = 0,922). Entretanto, não foram obtidas correlações com os teores de óxidos amorfos de ferro e com os teores de alumínio trocável.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraLeal, Jair RochaVelloso, Ary Carlos X.2014-04-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/17410Pesquisa Agropecuaria Brasileira; v.8, n.7, 1973: Série Agronomia; 81-88Pesquisa Agropecuária Brasileira; v.8, n.7, 1973: Série Agronomia; 81-881678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/17410/11674info:eu-repo/semantics/openAccess2014-04-15T18:48:35Zoai:ojs.seer.sct.embrapa.br:article/17410Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-15T18:48:35Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Phosphate adsorption in oxisols by humid brushland ( savannah)
Adsorção de fosfato em latossolos sob vegetação de cerrado
title Phosphate adsorption in oxisols by humid brushland ( savannah)
spellingShingle Phosphate adsorption in oxisols by humid brushland ( savannah)
Leal, Jair Rocha
title_short Phosphate adsorption in oxisols by humid brushland ( savannah)
title_full Phosphate adsorption in oxisols by humid brushland ( savannah)
title_fullStr Phosphate adsorption in oxisols by humid brushland ( savannah)
title_full_unstemmed Phosphate adsorption in oxisols by humid brushland ( savannah)
title_sort Phosphate adsorption in oxisols by humid brushland ( savannah)
author Leal, Jair Rocha
author_facet Leal, Jair Rocha
Velloso, Ary Carlos X.
author_role author
author2 Velloso, Ary Carlos X.
author2_role author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Leal, Jair Rocha
Velloso, Ary Carlos X.
dc.subject.none.fl_str_mv

description Adsorption of phosphate by nine oxisols collected in cerrados (savannah) of São Paulo and Goiás, showed a close relationship with the Langmuir isotherm. Calculated maximum adsorption (25°C; pH 5) for the nine soils varied from 23 to 70 mg P per hundred grams of soil. These maxima are intermediate among values found in the literature for other countries. The adsorption maxima were closely correlated with the amounts of amorphous aluminum oxides (r = 0,867), clay content (r = 0,938) and percentage organic matter (r = 0,922), respectively. Differences in exchangeable alumimum and differences in the amounts of amorphous iron oxides were not correlated with the adsorption maxima.
publishDate 2014
dc.date.none.fl_str_mv 2014-04-15
dc.type.none.fl_str_mv
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 https://seer.sct.embrapa.br/index.php/pab/article/view/17410
url https://seer.sct.embrapa.br/index.php/pab/article/view/17410
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/17410/11674
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 Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
publisher.none.fl_str_mv Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuária Brasileira
dc.source.none.fl_str_mv Pesquisa Agropecuaria Brasileira; v.8, n.7, 1973: Série Agronomia; 81-88
Pesquisa Agropecuária Brasileira; v.8, n.7, 1973: Série Agronomia; 81-88
1678-3921
0100-104x
reponame:Pesquisa Agropecuária Brasileira (Online)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron_str EMBRAPA
institution EMBRAPA
reponame_str Pesquisa Agropecuária Brasileira (Online)
collection Pesquisa Agropecuária Brasileira (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
repository.mail.fl_str_mv pab@sct.embrapa.br || sct.pab@embrapa.br
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