Phosphorus sorption, desorption and resorption by soils of the Brazilian Cerrado supporting eucalypt

Detalhes bibliográficos
Autor(a) principal: Barros, Nairam F.
Data de Publicação: 2005
Outros Autores: Comerford, N. B., Maciel Filho, Rubens
Tipo de documento: Artigo
Idioma: eng
Título da fonte: LOCUS Repositório Institucional da UFV
Texto Completo: https://doi.org/10.1016/j.biombioe.2004.08.005
http://www.locus.ufv.br/handle/123456789/23258
Resumo: Oxisols of the Brazilian Cerrado are highly weathered phosphorus deficient soils, on which eucalypt is increasingly being grown as a source of carbon and energy for steel manufacturing. Phosphorus (P) fertilization is a necessary practice to assure adequate eucalypt production; therefore, an understanding of cycling by inorganic soil P should lead to efficient P management and more accurate modeling of P bioavailability. Since sorption and desorption reactions control inorganic P bioavailability, the purpose of this study was to contrast P sorption, desorption and subsequent resorption for a range of Cerrado soils. Its specific objectives were to determine (i) if desorption and resorption show the same hysteresis shown by sorption and desorption, (ii) if Kd values of resorption and desorption for Cerrado soils are dependent on the soil's clay content and (iii) if resorption and desorption Kd values are a function of the amount of labile P on the soil surface. Three levels of P were sorbed onto four Cerrado soils with clay contents between 13% and 81%. Phosphorus desorption was measured using anion-exchange membranes. Sorption was a function of soil clay content, and a pedotransfer function for the soil partition coefficient was calculated with an r2=0.99. Desorption and resorption were dependent on both the clay content of the soil (r2=0.59–0.99) and the amount of sorbed labile P. Pedotransfer functions for each of these processes depend on accurate measurement of the inorganic P that responds to disequilibria exchange. Desorption and resorption were not hysteretic; yet desorption was hysteretic with the original sorption isotherm. This suggests the question: how useful are commonly produced sorption isotherms?
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spelling Barros, Nairam F.Comerford, N. B.Maciel Filho, Rubens2019-01-30T17:23:27Z2019-01-30T17:23:27Z2005-020961-9534https://doi.org/10.1016/j.biombioe.2004.08.005http://www.locus.ufv.br/handle/123456789/23258Oxisols of the Brazilian Cerrado are highly weathered phosphorus deficient soils, on which eucalypt is increasingly being grown as a source of carbon and energy for steel manufacturing. Phosphorus (P) fertilization is a necessary practice to assure adequate eucalypt production; therefore, an understanding of cycling by inorganic soil P should lead to efficient P management and more accurate modeling of P bioavailability. Since sorption and desorption reactions control inorganic P bioavailability, the purpose of this study was to contrast P sorption, desorption and subsequent resorption for a range of Cerrado soils. Its specific objectives were to determine (i) if desorption and resorption show the same hysteresis shown by sorption and desorption, (ii) if Kd values of resorption and desorption for Cerrado soils are dependent on the soil's clay content and (iii) if resorption and desorption Kd values are a function of the amount of labile P on the soil surface. Three levels of P were sorbed onto four Cerrado soils with clay contents between 13% and 81%. Phosphorus desorption was measured using anion-exchange membranes. Sorption was a function of soil clay content, and a pedotransfer function for the soil partition coefficient was calculated with an r2=0.99. Desorption and resorption were dependent on both the clay content of the soil (r2=0.59–0.99) and the amount of sorbed labile P. Pedotransfer functions for each of these processes depend on accurate measurement of the inorganic P that responds to disequilibria exchange. Desorption and resorption were not hysteretic; yet desorption was hysteretic with the original sorption isotherm. This suggests the question: how useful are commonly produced sorption isotherms?engBiomass and BioenergyVolume 28, Issue 2, Pages 229-236, February 2005Elsevier B. 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dc.title.en.fl_str_mv Phosphorus sorption, desorption and resorption by soils of the Brazilian Cerrado supporting eucalypt
title Phosphorus sorption, desorption and resorption by soils of the Brazilian Cerrado supporting eucalypt
spellingShingle Phosphorus sorption, desorption and resorption by soils of the Brazilian Cerrado supporting eucalypt
Barros, Nairam F.
Phosphorus
Sorption
Desorption
Resorption
Partition coefficient
Brazilian cerrado
Anion exchange membranes
title_short Phosphorus sorption, desorption and resorption by soils of the Brazilian Cerrado supporting eucalypt
title_full Phosphorus sorption, desorption and resorption by soils of the Brazilian Cerrado supporting eucalypt
title_fullStr Phosphorus sorption, desorption and resorption by soils of the Brazilian Cerrado supporting eucalypt
title_full_unstemmed Phosphorus sorption, desorption and resorption by soils of the Brazilian Cerrado supporting eucalypt
title_sort Phosphorus sorption, desorption and resorption by soils of the Brazilian Cerrado supporting eucalypt
author Barros, Nairam F.
author_facet Barros, Nairam F.
Comerford, N. B.
Maciel Filho, Rubens
author_role author
author2 Comerford, N. B.
Maciel Filho, Rubens
author2_role author
author
dc.contributor.author.fl_str_mv Barros, Nairam F.
Comerford, N. B.
Maciel Filho, Rubens
dc.subject.pt-BR.fl_str_mv Phosphorus
Sorption
Desorption
Resorption
Partition coefficient
Brazilian cerrado
Anion exchange membranes
topic Phosphorus
Sorption
Desorption
Resorption
Partition coefficient
Brazilian cerrado
Anion exchange membranes
description Oxisols of the Brazilian Cerrado are highly weathered phosphorus deficient soils, on which eucalypt is increasingly being grown as a source of carbon and energy for steel manufacturing. Phosphorus (P) fertilization is a necessary practice to assure adequate eucalypt production; therefore, an understanding of cycling by inorganic soil P should lead to efficient P management and more accurate modeling of P bioavailability. Since sorption and desorption reactions control inorganic P bioavailability, the purpose of this study was to contrast P sorption, desorption and subsequent resorption for a range of Cerrado soils. Its specific objectives were to determine (i) if desorption and resorption show the same hysteresis shown by sorption and desorption, (ii) if Kd values of resorption and desorption for Cerrado soils are dependent on the soil's clay content and (iii) if resorption and desorption Kd values are a function of the amount of labile P on the soil surface. Three levels of P were sorbed onto four Cerrado soils with clay contents between 13% and 81%. Phosphorus desorption was measured using anion-exchange membranes. Sorption was a function of soil clay content, and a pedotransfer function for the soil partition coefficient was calculated with an r2=0.99. Desorption and resorption were dependent on both the clay content of the soil (r2=0.59–0.99) and the amount of sorbed labile P. Pedotransfer functions for each of these processes depend on accurate measurement of the inorganic P that responds to disequilibria exchange. Desorption and resorption were not hysteretic; yet desorption was hysteretic with the original sorption isotherm. This suggests the question: how useful are commonly produced sorption isotherms?
publishDate 2005
dc.date.issued.fl_str_mv 2005-02
dc.date.accessioned.fl_str_mv 2019-01-30T17:23:27Z
dc.date.available.fl_str_mv 2019-01-30T17:23:27Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv https://doi.org/10.1016/j.biombioe.2004.08.005
http://www.locus.ufv.br/handle/123456789/23258
dc.identifier.issn.none.fl_str_mv 0961-9534
identifier_str_mv 0961-9534
url https://doi.org/10.1016/j.biombioe.2004.08.005
http://www.locus.ufv.br/handle/123456789/23258
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartofseries.pt-BR.fl_str_mv Volume 28, Issue 2, Pages 229-236, February 2005
dc.rights.driver.fl_str_mv Elsevier B. V.
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dc.publisher.none.fl_str_mv Biomass and Bioenergy
publisher.none.fl_str_mv Biomass and Bioenergy
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instname:Universidade Federal de Viçosa (UFV)
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