Adsorption and availability of phosphorus in response to humic acid rates in soils limed with CaCO3 or MgCO3

Detalhes bibliográficos
Autor(a) principal: Maluf, Henrique José Guimarães Moreira
Data de Publicação: 2018
Outros Autores: Silva, Carlos Alberto, Curi, Nilton, Norton, Lloyd Darrell, Rosa, Sara Dantas
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/33032
Resumo: Humic acid (HA) may reduce adsorption and increase soil P availability, however, the magnitude of this effect is different when Ca2+ prevails over Mg2+ in limed soils. The objective of this study was to evaluate the effects of HA rates and carbonate sources on the adsorption, phosphate maximum buffering capacity (PMBC), and P availability in two contrasting soils. Oxisol and Entisol samples were firstly incubated with the following HA rates: 0, 20, 50, 100, 200 and 400 mg kg-1, combined with CaCO3 or MgCO3, to evaluate P adsorption. In sequence, soil samples were newly incubated with P (400 mg kg-1) to evaluate P availability. The least P adsorption was found when 296 mg kg-1 of HA was added to Oxisol. Applying HA rates decreased maximum adsorption capacity, increased P binding energy to soil colloids and did not alter PMBC of Entisol. Available P contents in Oxisol increased with HA rates, but it did not change in Entisol. Choosing the right HA rate can decrease PMBC up to 40% and increase the Oxisol P availability by 17%. Application of MgCO3 instead of CaCO3 decreased P adsorption in both soils. Thus, a positive correlation between Ca2+ content and PMBC was verified. Optimum rate of HA and the preponderance of Mg2+ instead of Ca2+ in soil volume fertilized with P are effective practices to reduce adsorption and increase P availability, especially in clayey Oxisol.
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spelling Adsorption and availability of phosphorus in response to humic acid rates in soils limed with CaCO3 or MgCO3Adsorção e disponibilidade de fósforo em resposta a doses de ácido húmico em solos corrigidos por CaCO3 ou MgCO3Organic ligandsHumic acid-metal-P complexesLangmuir isothermPhosphate maximum buffering capacityLigantes orgânicosComplexos ácido húmico-metal-PIsoterma de LangmuirFator capacidade de fósforo máximoHumic acid (HA) may reduce adsorption and increase soil P availability, however, the magnitude of this effect is different when Ca2+ prevails over Mg2+ in limed soils. The objective of this study was to evaluate the effects of HA rates and carbonate sources on the adsorption, phosphate maximum buffering capacity (PMBC), and P availability in two contrasting soils. Oxisol and Entisol samples were firstly incubated with the following HA rates: 0, 20, 50, 100, 200 and 400 mg kg-1, combined with CaCO3 or MgCO3, to evaluate P adsorption. In sequence, soil samples were newly incubated with P (400 mg kg-1) to evaluate P availability. The least P adsorption was found when 296 mg kg-1 of HA was added to Oxisol. Applying HA rates decreased maximum adsorption capacity, increased P binding energy to soil colloids and did not alter PMBC of Entisol. Available P contents in Oxisol increased with HA rates, but it did not change in Entisol. Choosing the right HA rate can decrease PMBC up to 40% and increase the Oxisol P availability by 17%. Application of MgCO3 instead of CaCO3 decreased P adsorption in both soils. Thus, a positive correlation between Ca2+ content and PMBC was verified. Optimum rate of HA and the preponderance of Mg2+ instead of Ca2+ in soil volume fertilized with P are effective practices to reduce adsorption and increase P availability, especially in clayey Oxisol.O ácido húmico (AH) pode reduzir a adsorção e aumentar a disponibilidade de P nos solos, entretanto, a magnitude desse efeito é diferente quando o Ca2+ prevalece sobre Mg2+ em solos com acidez corrigida. Objetivou-se avaliar os efeitos de doses de AH e fontes de carbonato na adsorção, fator capacidade de P máximo (FCPm) e disponibilidade de P em solos contrastantes. Amostras de Latossolo e Gleissolo foram primeiramente incubadas com as seguintes doses de AH: 0, 20, 50, 100, 200 e 400 mg kg-1, combinadas com CaCO3 ou MgCO3, para avaliar a adsorção de P. Em sequência, as amostras de solo foram novamente incubadas com P (400 mg kg-1), para determinar a disponibilidade de P. A aplicação de doses de AH reduziu a capacidade máxima de adsorção, aumentou a energia de ligação do P e não alterou a FCPm do Gleissolo. O teor de P disponível aumentou com o acréscimo das doses de AH no Latossolo, contudo, não foram alterados no Gleissolo. A escolha correta da dose de AH reduziu a FCPm em até 40% e aumentou a disponibilidade de P no Latossolo em 17%. A aplicação de MgCO3 em vez do CaCO3 reduziu a adsorção de P em ambos os solos. Assim, houve correlação positiva entre o teor de Ca2+ e a FCPm. A dose ótima de AH e a predominância de Mg2+ sobre Ca2+ no volume de solo adubado com P são práticas efetivas para reduzir a adsorção e aumentar a disponibilidade de P, especialmente, no Latossolo argiloso.Editora da Universidade Federal de Lavras2019-02-25T18:06:21Z2019-02-25T18:06:21Z2018-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfMALUF, H. J. G. M. et al. Adsorption and availability of phosphorus in response to humic acid rates in soils limed with CaCO3 or MgCO3. Ciência e Agrotecnologia, Lavras, v. 42, n. 1, p. 7-20, Jan./Feb. 2018.http://repositorio.ufla.br/jspui/handle/1/33032Ciência e Agrotecnologiareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessMaluf, Henrique José Guimarães MoreiraSilva, Carlos AlbertoCuri, NiltonNorton, Lloyd DarrellRosa, Sara Dantaseng2019-02-25T18:06:22Zoai:localhost:1/33032Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2019-02-25T18:06:22Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Adsorption and availability of phosphorus in response to humic acid rates in soils limed with CaCO3 or MgCO3
Adsorção e disponibilidade de fósforo em resposta a doses de ácido húmico em solos corrigidos por CaCO3 ou MgCO3
title Adsorption and availability of phosphorus in response to humic acid rates in soils limed with CaCO3 or MgCO3
spellingShingle Adsorption and availability of phosphorus in response to humic acid rates in soils limed with CaCO3 or MgCO3
Maluf, Henrique José Guimarães Moreira
Organic ligands
Humic acid-metal-P complexes
Langmuir isotherm
Phosphate maximum buffering capacity
Ligantes orgânicos
Complexos ácido húmico-metal-P
Isoterma de Langmuir
Fator capacidade de fósforo máximo
title_short Adsorption and availability of phosphorus in response to humic acid rates in soils limed with CaCO3 or MgCO3
title_full Adsorption and availability of phosphorus in response to humic acid rates in soils limed with CaCO3 or MgCO3
title_fullStr Adsorption and availability of phosphorus in response to humic acid rates in soils limed with CaCO3 or MgCO3
title_full_unstemmed Adsorption and availability of phosphorus in response to humic acid rates in soils limed with CaCO3 or MgCO3
title_sort Adsorption and availability of phosphorus in response to humic acid rates in soils limed with CaCO3 or MgCO3
author Maluf, Henrique José Guimarães Moreira
author_facet Maluf, Henrique José Guimarães Moreira
Silva, Carlos Alberto
Curi, Nilton
Norton, Lloyd Darrell
Rosa, Sara Dantas
author_role author
author2 Silva, Carlos Alberto
Curi, Nilton
Norton, Lloyd Darrell
Rosa, Sara Dantas
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Maluf, Henrique José Guimarães Moreira
Silva, Carlos Alberto
Curi, Nilton
Norton, Lloyd Darrell
Rosa, Sara Dantas
dc.subject.por.fl_str_mv Organic ligands
Humic acid-metal-P complexes
Langmuir isotherm
Phosphate maximum buffering capacity
Ligantes orgânicos
Complexos ácido húmico-metal-P
Isoterma de Langmuir
Fator capacidade de fósforo máximo
topic Organic ligands
Humic acid-metal-P complexes
Langmuir isotherm
Phosphate maximum buffering capacity
Ligantes orgânicos
Complexos ácido húmico-metal-P
Isoterma de Langmuir
Fator capacidade de fósforo máximo
description Humic acid (HA) may reduce adsorption and increase soil P availability, however, the magnitude of this effect is different when Ca2+ prevails over Mg2+ in limed soils. The objective of this study was to evaluate the effects of HA rates and carbonate sources on the adsorption, phosphate maximum buffering capacity (PMBC), and P availability in two contrasting soils. Oxisol and Entisol samples were firstly incubated with the following HA rates: 0, 20, 50, 100, 200 and 400 mg kg-1, combined with CaCO3 or MgCO3, to evaluate P adsorption. In sequence, soil samples were newly incubated with P (400 mg kg-1) to evaluate P availability. The least P adsorption was found when 296 mg kg-1 of HA was added to Oxisol. Applying HA rates decreased maximum adsorption capacity, increased P binding energy to soil colloids and did not alter PMBC of Entisol. Available P contents in Oxisol increased with HA rates, but it did not change in Entisol. Choosing the right HA rate can decrease PMBC up to 40% and increase the Oxisol P availability by 17%. Application of MgCO3 instead of CaCO3 decreased P adsorption in both soils. Thus, a positive correlation between Ca2+ content and PMBC was verified. Optimum rate of HA and the preponderance of Mg2+ instead of Ca2+ in soil volume fertilized with P are effective practices to reduce adsorption and increase P availability, especially in clayey Oxisol.
publishDate 2018
dc.date.none.fl_str_mv 2018-01
2019-02-25T18:06:21Z
2019-02-25T18:06:21Z
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 MALUF, H. J. G. M. et al. Adsorption and availability of phosphorus in response to humic acid rates in soils limed with CaCO3 or MgCO3. Ciência e Agrotecnologia, Lavras, v. 42, n. 1, p. 7-20, Jan./Feb. 2018.
http://repositorio.ufla.br/jspui/handle/1/33032
identifier_str_mv MALUF, H. J. G. M. et al. Adsorption and availability of phosphorus in response to humic acid rates in soils limed with CaCO3 or MgCO3. Ciência e Agrotecnologia, Lavras, v. 42, n. 1, p. 7-20, Jan./Feb. 2018.
url http://repositorio.ufla.br/jspui/handle/1/33032
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 Editora da Universidade Federal de Lavras
publisher.none.fl_str_mv Editora da 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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