Incubation methods for assessing mineralizable nitrogen in soils under sugarcane

Detalhes bibliográficos
Autor(a) principal: Mariano,Eduardo
Data de Publicação: 2013
Outros Autores: Trivelin,Paulo Cesar Ocheuze, Leite,José Marcos, Megda,Michele Xavier Vieira, Otto,Rafael, Franco,Henrique Coutinho Junqueira
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Ciência do Solo (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000200016
Resumo: Considering nitrogen mineralization (N) of soil organic matter is a key aspect for the efficient management of N fertilizers in agricultural systems. Long-term aerobic incubation is the standard technique for calibrating the chemical extraction methods used to estimate the potentially mineralizable N in soil. However, the technique is laborious, expensive and time-consuming. In this context, the aims of this study were to determine the amount of soil mineralizable N in the 0-60 cm layer and to evaluate the use of short-term anaerobic incubation instead of long-term aerobic incubation for the estimation of net N mineralization rates in soils under sugarcane. Five soils from areas without previous N fertilization were used in the layers 0-20, 20-40 and 40-60 cm. Soil samples were aerobically incubated at 35 ºC for 32 weeks or anaerobically incubated (waterlogged) at 40 ºC for seven days to determine the net soil N mineralization. The sand, silt and clay contents were highly correlated with the indexes used for predicting mineralizable N. The 0-40 cm layer was the best sampling depth for the estimation of soil mineralizable N, while in the 40-60 cm layer net N mineralization was low in both incubation procedures. Anaerobic incubation provided reliable estimates of mineralizable N in the soil that correlated well with the indexes obtained using aerobic incubation. The inclusion of the pre-existing NH4+-N content improved the reliability of the estimate of mineralizable N obtained using anaerobic incubation.
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spelling Incubation methods for assessing mineralizable nitrogen in soils under sugarcaneSaccharum spp.net N mineralizationaerobic incubationanaerobic incubationConsidering nitrogen mineralization (N) of soil organic matter is a key aspect for the efficient management of N fertilizers in agricultural systems. Long-term aerobic incubation is the standard technique for calibrating the chemical extraction methods used to estimate the potentially mineralizable N in soil. However, the technique is laborious, expensive and time-consuming. In this context, the aims of this study were to determine the amount of soil mineralizable N in the 0-60 cm layer and to evaluate the use of short-term anaerobic incubation instead of long-term aerobic incubation for the estimation of net N mineralization rates in soils under sugarcane. Five soils from areas without previous N fertilization were used in the layers 0-20, 20-40 and 40-60 cm. Soil samples were aerobically incubated at 35 ºC for 32 weeks or anaerobically incubated (waterlogged) at 40 ºC for seven days to determine the net soil N mineralization. The sand, silt and clay contents were highly correlated with the indexes used for predicting mineralizable N. The 0-40 cm layer was the best sampling depth for the estimation of soil mineralizable N, while in the 40-60 cm layer net N mineralization was low in both incubation procedures. Anaerobic incubation provided reliable estimates of mineralizable N in the soil that correlated well with the indexes obtained using aerobic incubation. The inclusion of the pre-existing NH4+-N content improved the reliability of the estimate of mineralizable N obtained using anaerobic incubation.Sociedade Brasileira de Ciência do Solo2013-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000200016Revista Brasileira de Ciência do Solo v.37 n.2 2013reponame:Revista Brasileira de Ciência do Solo (Online)instname:Sociedade Brasileira de Ciência do Solo (SBCS)instacron:SBCS10.1590/S0100-06832013000200016info:eu-repo/semantics/openAccessMariano,EduardoTrivelin,Paulo Cesar OcheuzeLeite,José MarcosMegda,Michele Xavier VieiraOtto,RafaelFranco,Henrique Coutinho Junqueiraeng2013-06-03T00:00:00Zoai:scielo:S0100-06832013000200016Revistahttp://www.scielo.br/scielo.php?script=sci_serial&pid=0100-0683&lng=es&nrm=isohttps://old.scielo.br/oai/scielo-oai.php||sbcs@ufv.br1806-96570100-0683opendoar:2013-06-03T00:00Revista Brasileira de Ciência do Solo (Online) - Sociedade Brasileira de Ciência do Solo (SBCS)false
dc.title.none.fl_str_mv Incubation methods for assessing mineralizable nitrogen in soils under sugarcane
title Incubation methods for assessing mineralizable nitrogen in soils under sugarcane
spellingShingle Incubation methods for assessing mineralizable nitrogen in soils under sugarcane
Mariano,Eduardo
Saccharum spp.
net N mineralization
aerobic incubation
anaerobic incubation
title_short Incubation methods for assessing mineralizable nitrogen in soils under sugarcane
title_full Incubation methods for assessing mineralizable nitrogen in soils under sugarcane
title_fullStr Incubation methods for assessing mineralizable nitrogen in soils under sugarcane
title_full_unstemmed Incubation methods for assessing mineralizable nitrogen in soils under sugarcane
title_sort Incubation methods for assessing mineralizable nitrogen in soils under sugarcane
author Mariano,Eduardo
author_facet Mariano,Eduardo
Trivelin,Paulo Cesar Ocheuze
Leite,José Marcos
Megda,Michele Xavier Vieira
Otto,Rafael
Franco,Henrique Coutinho Junqueira
author_role author
author2 Trivelin,Paulo Cesar Ocheuze
Leite,José Marcos
Megda,Michele Xavier Vieira
Otto,Rafael
Franco,Henrique Coutinho Junqueira
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Mariano,Eduardo
Trivelin,Paulo Cesar Ocheuze
Leite,José Marcos
Megda,Michele Xavier Vieira
Otto,Rafael
Franco,Henrique Coutinho Junqueira
dc.subject.por.fl_str_mv Saccharum spp.
net N mineralization
aerobic incubation
anaerobic incubation
topic Saccharum spp.
net N mineralization
aerobic incubation
anaerobic incubation
description Considering nitrogen mineralization (N) of soil organic matter is a key aspect for the efficient management of N fertilizers in agricultural systems. Long-term aerobic incubation is the standard technique for calibrating the chemical extraction methods used to estimate the potentially mineralizable N in soil. However, the technique is laborious, expensive and time-consuming. In this context, the aims of this study were to determine the amount of soil mineralizable N in the 0-60 cm layer and to evaluate the use of short-term anaerobic incubation instead of long-term aerobic incubation for the estimation of net N mineralization rates in soils under sugarcane. Five soils from areas without previous N fertilization were used in the layers 0-20, 20-40 and 40-60 cm. Soil samples were aerobically incubated at 35 ºC for 32 weeks or anaerobically incubated (waterlogged) at 40 ºC for seven days to determine the net soil N mineralization. The sand, silt and clay contents were highly correlated with the indexes used for predicting mineralizable N. The 0-40 cm layer was the best sampling depth for the estimation of soil mineralizable N, while in the 40-60 cm layer net N mineralization was low in both incubation procedures. Anaerobic incubation provided reliable estimates of mineralizable N in the soil that correlated well with the indexes obtained using aerobic incubation. The inclusion of the pre-existing NH4+-N content improved the reliability of the estimate of mineralizable N obtained using anaerobic incubation.
publishDate 2013
dc.date.none.fl_str_mv 2013-04-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000200016
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dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0100-06832013000200016
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.publisher.none.fl_str_mv Sociedade Brasileira de Ciência do Solo
publisher.none.fl_str_mv Sociedade Brasileira de Ciência do Solo
dc.source.none.fl_str_mv Revista Brasileira de Ciência do Solo v.37 n.2 2013
reponame:Revista Brasileira de Ciência do Solo (Online)
instname:Sociedade Brasileira de Ciência do Solo (SBCS)
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instname_str Sociedade Brasileira de Ciência do Solo (SBCS)
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reponame_str Revista Brasileira de Ciência do Solo (Online)
collection Revista Brasileira de Ciência do Solo (Online)
repository.name.fl_str_mv Revista Brasileira de Ciência do Solo (Online) - Sociedade Brasileira de Ciência do Solo (SBCS)
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