Evaluation of DSSAT soil-water balance module under cropped and bare soil conditions

Detalhes bibliográficos
Autor(a) principal: Faria,Rogério Teixeira de
Data de Publicação: 2003
Outros Autores: Bowen,Walter Truman
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Archives of Biology and Technology
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400001
Resumo: The performance of the soil water balance module (SWBM) in the models of DSSAT v3.5 was evaluated against soil moisture data measured in bare soil and dry bean plots, in Paraná, southern Brazil. Under bare soil, the SWBM showed a low performance to simulate soil moisture profiles due to inadequacies of the method used to calculate unsaturated soil water flux. Improved estimates were achieved by modifying the SWBM with the use of Darcy's equation to simulate soil water flux as a function of soil water potential gradient between consecutive soil layers. When used to simulate water balance for the bean crop, the modified SWBM improved soil moisture estimation but underpredicted crop yield. Root water uptake data indicated that assumptions on the original method limited plant water extraction for the soil in the study area. This was corrected by replacing empirical coefficients with measured values of soil hydraulic conductivity at different depths.
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spelling Evaluation of DSSAT soil-water balance module under cropped and bare soil conditionsSoil moistureDry BeanmodelingThe performance of the soil water balance module (SWBM) in the models of DSSAT v3.5 was evaluated against soil moisture data measured in bare soil and dry bean plots, in Paraná, southern Brazil. Under bare soil, the SWBM showed a low performance to simulate soil moisture profiles due to inadequacies of the method used to calculate unsaturated soil water flux. Improved estimates were achieved by modifying the SWBM with the use of Darcy's equation to simulate soil water flux as a function of soil water potential gradient between consecutive soil layers. When used to simulate water balance for the bean crop, the modified SWBM improved soil moisture estimation but underpredicted crop yield. Root water uptake data indicated that assumptions on the original method limited plant water extraction for the soil in the study area. This was corrected by replacing empirical coefficients with measured values of soil hydraulic conductivity at different depths.Instituto de Tecnologia do Paraná - Tecpar2003-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400001Brazilian Archives of Biology and Technology v.46 n.4 2003reponame:Brazilian Archives of Biology and Technologyinstname:Instituto de Tecnologia do Paraná (Tecpar)instacron:TECPAR10.1590/S1516-89132003000400001info:eu-repo/semantics/openAccessFaria,Rogério Teixeira deBowen,Walter Trumaneng2004-02-11T00:00:00Zoai:scielo:S1516-89132003000400001Revistahttps://www.scielo.br/j/babt/https://old.scielo.br/oai/scielo-oai.phpbabt@tecpar.br||babt@tecpar.br1678-43241516-8913opendoar:2004-02-11T00:00Brazilian Archives of Biology and Technology - Instituto de Tecnologia do Paraná (Tecpar)false
dc.title.none.fl_str_mv Evaluation of DSSAT soil-water balance module under cropped and bare soil conditions
title Evaluation of DSSAT soil-water balance module under cropped and bare soil conditions
spellingShingle Evaluation of DSSAT soil-water balance module under cropped and bare soil conditions
Faria,Rogério Teixeira de
Soil moisture
Dry Bean
modeling
title_short Evaluation of DSSAT soil-water balance module under cropped and bare soil conditions
title_full Evaluation of DSSAT soil-water balance module under cropped and bare soil conditions
title_fullStr Evaluation of DSSAT soil-water balance module under cropped and bare soil conditions
title_full_unstemmed Evaluation of DSSAT soil-water balance module under cropped and bare soil conditions
title_sort Evaluation of DSSAT soil-water balance module under cropped and bare soil conditions
author Faria,Rogério Teixeira de
author_facet Faria,Rogério Teixeira de
Bowen,Walter Truman
author_role author
author2 Bowen,Walter Truman
author2_role author
dc.contributor.author.fl_str_mv Faria,Rogério Teixeira de
Bowen,Walter Truman
dc.subject.por.fl_str_mv Soil moisture
Dry Bean
modeling
topic Soil moisture
Dry Bean
modeling
description The performance of the soil water balance module (SWBM) in the models of DSSAT v3.5 was evaluated against soil moisture data measured in bare soil and dry bean plots, in Paraná, southern Brazil. Under bare soil, the SWBM showed a low performance to simulate soil moisture profiles due to inadequacies of the method used to calculate unsaturated soil water flux. Improved estimates were achieved by modifying the SWBM with the use of Darcy's equation to simulate soil water flux as a function of soil water potential gradient between consecutive soil layers. When used to simulate water balance for the bean crop, the modified SWBM improved soil moisture estimation but underpredicted crop yield. Root water uptake data indicated that assumptions on the original method limited plant water extraction for the soil in the study area. This was corrected by replacing empirical coefficients with measured values of soil hydraulic conductivity at different depths.
publishDate 2003
dc.date.none.fl_str_mv 2003-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400001
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000400001
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1516-89132003000400001
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Instituto de Tecnologia do Paraná - Tecpar
publisher.none.fl_str_mv Instituto de Tecnologia do Paraná - Tecpar
dc.source.none.fl_str_mv Brazilian Archives of Biology and Technology v.46 n.4 2003
reponame:Brazilian Archives of Biology and Technology
instname:Instituto de Tecnologia do Paraná (Tecpar)
instacron:TECPAR
instname_str Instituto de Tecnologia do Paraná (Tecpar)
instacron_str TECPAR
institution TECPAR
reponame_str Brazilian Archives of Biology and Technology
collection Brazilian Archives of Biology and Technology
repository.name.fl_str_mv Brazilian Archives of Biology and Technology - Instituto de Tecnologia do Paraná (Tecpar)
repository.mail.fl_str_mv babt@tecpar.br||babt@tecpar.br
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