Nitrate movement on surface and subsurface horizons of Udox and Udult soils with variable charges

Detalhes bibliográficos
Autor(a) principal: Alcântara, Marco Aurélio Kondracki de
Data de Publicação: 2011
Outros Autores: Camargo, Otávio Antonio de
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/1723
Resumo: The objective of this work was to evaluate nitrate movement on soil columns considering mainly, total amount recovered, fit among experimental and model‑predicted transposition curves, and model‑obtained retardation factors. Samples of A and B horizons of Udox and Udult soils were used. A leaching experiment was carried out considering the miscible displacement theory, using 100 mL of a 10-mmol L-1 KNO3 solution as pulse. The amounts of nitrate leached and recovered in the columns for Udox and Udult soils in horizons A and B varied from 0.405 to 1.432 mmol L-1. There was significant (p<0.05) correlation between experimental and model-predicted curves for columns Udult-A, Udult-B and Udox-B. The mathematical model used is suitable for predicting nitrate lixiviation in B-horizon columns in Udox and Udult soils. The retardation factor was greater than 1.0 in the soil columns with good fit among experimental and predicted data, which indicates that the nitrate movement is delayed in comparison to the advance of the soil wetting front.
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spelling Nitrate movement on surface and subsurface horizons of Udox and Udult soils with variable chargesMovimentação de nitrato em horizonte superficial e subsuperficial de Latossolo e Nitossolo com cargas variáveisretardation factor; mathematical model; tropical soilsfator de retardamento; modelo matemático; solos tropicaisThe objective of this work was to evaluate nitrate movement on soil columns considering mainly, total amount recovered, fit among experimental and model‑predicted transposition curves, and model‑obtained retardation factors. Samples of A and B horizons of Udox and Udult soils were used. A leaching experiment was carried out considering the miscible displacement theory, using 100 mL of a 10-mmol L-1 KNO3 solution as pulse. The amounts of nitrate leached and recovered in the columns for Udox and Udult soils in horizons A and B varied from 0.405 to 1.432 mmol L-1. There was significant (p<0.05) correlation between experimental and model-predicted curves for columns Udult-A, Udult-B and Udox-B. The mathematical model used is suitable for predicting nitrate lixiviation in B-horizon columns in Udox and Udult soils. The retardation factor was greater than 1.0 in the soil columns with good fit among experimental and predicted data, which indicates that the nitrate movement is delayed in comparison to the advance of the soil wetting front.O objetivo deste trabalho foi avaliar a movimentação de nitrato em colunas de solo considerando-se, principalmente, a quantidade total recuperada, o ajuste entre as curvas de transposição experimental e predita por um modelo matemático e os fatores de retardamento obtidos pelo modelo. Foram utilizadas amostras dos horizontes A e B de um Latossolo Vermelho acriférrico e de um Nitossolo Vermelho eutrófico (LV‑A, LV‑B, NV-A e NV-B). O experimento de lixiviação foi conduzido tendo em vista a teoria do deslocamento miscível, utilizando como pulso 100 mL de KNO3 10 mmol L-1. As quantidades lixiviadas de nitrato e recuperadas nas colunas, para os solos NV e LV nos horizontes A e B, variaram de 0,405 a 1,432 mmol L-1. Houve correlação significativa (p<0,05) entre as curvas experimentais e as ajustadas pelo modelo para as colunas NV‑A, NV‑B e LV-B. O modelo matemático utilizado é adequado para prever a lixiviação de nitrato em colunas do horizonte B dos solos Nitossolo Vermelho Eutrófico e Latossolo Vermelho Acriférrico. Nas colunas dos solos com bom ajuste entre dados experimentais e preditos, o fator de retardamento é maior do que 1, o que indica que a movimentação do nitrato é retardada em relação ao avanço da frente de molhamento do solo.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraFapesp, CNPqAlcântara, Marco Aurélio Kondracki deCamargo, Otávio Antonio de2011-01-18info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/1723Pesquisa Agropecuaria Brasileira; v.45, n.1, jan. 2010; 81-88Pesquisa Agropecuária Brasileira; v.45, n.1, jan. 2010; 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/1723/5950https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/1723/1125info:eu-repo/semantics/openAccess2014-10-15T20:54:18Zoai:ojs.seer.sct.embrapa.br:article/1723Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-10-15T20:54:18Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Nitrate movement on surface and subsurface horizons of Udox and Udult soils with variable charges
Movimentação de nitrato em horizonte superficial e subsuperficial de Latossolo e Nitossolo com cargas variáveis
title Nitrate movement on surface and subsurface horizons of Udox and Udult soils with variable charges
spellingShingle Nitrate movement on surface and subsurface horizons of Udox and Udult soils with variable charges
Alcântara, Marco Aurélio Kondracki de
retardation factor; mathematical model; tropical soils
fator de retardamento; modelo matemático; solos tropicais
title_short Nitrate movement on surface and subsurface horizons of Udox and Udult soils with variable charges
title_full Nitrate movement on surface and subsurface horizons of Udox and Udult soils with variable charges
title_fullStr Nitrate movement on surface and subsurface horizons of Udox and Udult soils with variable charges
title_full_unstemmed Nitrate movement on surface and subsurface horizons of Udox and Udult soils with variable charges
title_sort Nitrate movement on surface and subsurface horizons of Udox and Udult soils with variable charges
author Alcântara, Marco Aurélio Kondracki de
author_facet Alcântara, Marco Aurélio Kondracki de
Camargo, Otávio Antonio de
author_role author
author2 Camargo, Otávio Antonio de
author2_role author
dc.contributor.none.fl_str_mv
Fapesp, CNPq
dc.contributor.author.fl_str_mv Alcântara, Marco Aurélio Kondracki de
Camargo, Otávio Antonio de
dc.subject.por.fl_str_mv retardation factor; mathematical model; tropical soils
fator de retardamento; modelo matemático; solos tropicais
topic retardation factor; mathematical model; tropical soils
fator de retardamento; modelo matemático; solos tropicais
description The objective of this work was to evaluate nitrate movement on soil columns considering mainly, total amount recovered, fit among experimental and model‑predicted transposition curves, and model‑obtained retardation factors. Samples of A and B horizons of Udox and Udult soils were used. A leaching experiment was carried out considering the miscible displacement theory, using 100 mL of a 10-mmol L-1 KNO3 solution as pulse. The amounts of nitrate leached and recovered in the columns for Udox and Udult soils in horizons A and B varied from 0.405 to 1.432 mmol L-1. There was significant (p<0.05) correlation between experimental and model-predicted curves for columns Udult-A, Udult-B and Udox-B. The mathematical model used is suitable for predicting nitrate lixiviation in B-horizon columns in Udox and Udult soils. The retardation factor was greater than 1.0 in the soil columns with good fit among experimental and predicted data, which indicates that the nitrate movement is delayed in comparison to the advance of the soil wetting front.
publishDate 2011
dc.date.none.fl_str_mv 2011-01-18
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/1723
url https://seer.sct.embrapa.br/index.php/pab/article/view/1723
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/1723/5950
https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/1723/1125
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.45, n.1, jan. 2010; 81-88
Pesquisa Agropecuária Brasileira; v.45, n.1, jan. 2010; 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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