Evaluation of DSSAT soil-water balance module under cropped and bare soil conditions
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | |
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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Brazilian Archives of Biology and Technology |
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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 |
_version_ |
1750318269466673152 |