Empirical models to predict soil nitrogen mineralization
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Ciência Rural |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782002000300005 |
Resumo: | Empirical models are mathematical equations that can be fitted to experimental results. The use of these models aims to evaluate or predict observed phenomena or experimental data with the objective of helping the development of adequate soil management practices. Based on these considerations, eight mathematical models described in the literature are compared in the present work, using as experimental data the mineral N accumulated during 32 weeks of incubation in Southern Brazilian soils. To obtain mineralization values experimentally, an incubation-washing procedure with 0.01mol L-1 CaCl2 was used. Mineral N was determined at the beginning of the incubation and in the 2nd, 4th, 8th, 16th and 32nd weeks. Among the models, the best fit was obtained with the simple exponential model to describe the mineralization of organic N in the soils. The double exponential models showed quite good fit, but may be superparametrized. In addition, the hypothesis on which these models are based, i.e., the presence of two forms of organic N susceptible to mineralization, cannot be sustained in this study. |
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Ciência rural (Online) |
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Empirical models to predict soil nitrogen mineralizationpotentially mineralizable Nmathematical modelssimple and double exponentialN poolsEmpirical models are mathematical equations that can be fitted to experimental results. The use of these models aims to evaluate or predict observed phenomena or experimental data with the objective of helping the development of adequate soil management practices. Based on these considerations, eight mathematical models described in the literature are compared in the present work, using as experimental data the mineral N accumulated during 32 weeks of incubation in Southern Brazilian soils. To obtain mineralization values experimentally, an incubation-washing procedure with 0.01mol L-1 CaCl2 was used. Mineral N was determined at the beginning of the incubation and in the 2nd, 4th, 8th, 16th and 32nd weeks. Among the models, the best fit was obtained with the simple exponential model to describe the mineralization of organic N in the soils. The double exponential models showed quite good fit, but may be superparametrized. In addition, the hypothesis on which these models are based, i.e., the presence of two forms of organic N susceptible to mineralization, cannot be sustained in this study.Universidade Federal de Santa Maria2002-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782002000300005Ciência Rural v.32 n.3 2002reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/S0103-84782002000300005info:eu-repo/semantics/openAccessCamargo,Flávio Anastácio de OliveiraGianello,ClesioTedesco,Marino JoséRiboldi,JoãoMeurer,Egon JoséBissani,Carlos Albertoeng2003-11-03T00:00:00ZRevista |
dc.title.none.fl_str_mv |
Empirical models to predict soil nitrogen mineralization |
title |
Empirical models to predict soil nitrogen mineralization |
spellingShingle |
Empirical models to predict soil nitrogen mineralization Camargo,Flávio Anastácio de Oliveira potentially mineralizable N mathematical models simple and double exponential N pools |
title_short |
Empirical models to predict soil nitrogen mineralization |
title_full |
Empirical models to predict soil nitrogen mineralization |
title_fullStr |
Empirical models to predict soil nitrogen mineralization |
title_full_unstemmed |
Empirical models to predict soil nitrogen mineralization |
title_sort |
Empirical models to predict soil nitrogen mineralization |
author |
Camargo,Flávio Anastácio de Oliveira |
author_facet |
Camargo,Flávio Anastácio de Oliveira Gianello,Clesio Tedesco,Marino José Riboldi,João Meurer,Egon José Bissani,Carlos Alberto |
author_role |
author |
author2 |
Gianello,Clesio Tedesco,Marino José Riboldi,João Meurer,Egon José Bissani,Carlos Alberto |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Camargo,Flávio Anastácio de Oliveira Gianello,Clesio Tedesco,Marino José Riboldi,João Meurer,Egon José Bissani,Carlos Alberto |
dc.subject.por.fl_str_mv |
potentially mineralizable N mathematical models simple and double exponential N pools |
topic |
potentially mineralizable N mathematical models simple and double exponential N pools |
description |
Empirical models are mathematical equations that can be fitted to experimental results. The use of these models aims to evaluate or predict observed phenomena or experimental data with the objective of helping the development of adequate soil management practices. Based on these considerations, eight mathematical models described in the literature are compared in the present work, using as experimental data the mineral N accumulated during 32 weeks of incubation in Southern Brazilian soils. To obtain mineralization values experimentally, an incubation-washing procedure with 0.01mol L-1 CaCl2 was used. Mineral N was determined at the beginning of the incubation and in the 2nd, 4th, 8th, 16th and 32nd weeks. Among the models, the best fit was obtained with the simple exponential model to describe the mineralization of organic N in the soils. The double exponential models showed quite good fit, but may be superparametrized. In addition, the hypothesis on which these models are based, i.e., the presence of two forms of organic N susceptible to mineralization, cannot be sustained in this study. |
publishDate |
2002 |
dc.date.none.fl_str_mv |
2002-06-01 |
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=S0103-84782002000300005 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782002000300005 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-84782002000300005 |
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 |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Rural v.32 n.3 2002 reponame:Ciência Rural instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Rural |
collection |
Ciência Rural |
repository.name.fl_str_mv |
|
repository.mail.fl_str_mv |
|
_version_ |
1749140523095949312 |