Nitrogen fractions in the microbial biomass in soils of southern Brazil
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | , |
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=S0100-06831999000100022 |
Resumo: | The reaction of nitrogen compounds with ninhydrin can be used as an indicator of cytoplasmic materials released from microbial cells killed by fumigation. Total-N, ninhydrin-reactive-N (NR-N), ammonium-N (A-N), and α-amino-N in the microbial biomass of soils from the State of Rio Grande do Sul, Brazil, were determined, in 1996, in 0.5 mol L-1 K2SO4 extracts of fumigated and non-fumigated soils. Total-N varied from 20.3 to 104.4 mg kg-1 and the ninhydrin-reactive-N corresponded, in average, to 27% of this. The ninhydrin-reactive-N was made up of 67% ammonium-N and 33% aminoacids with the amino group at the α-carbon position. It was concluded that colorimetric analysis of NR-N and A-N may be used as a direct measure of microbial N in soil. This simple and rapid procedure is adequate for routine analyses. |
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Revista Brasileira de Ciência do Solo (Online) |
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Nitrogen fractions in the microbial biomass in soils of southern BrazilBiomass-Nbiomass ninhydrin-reactive-Nbiomass ammonium-Nbiomass α-amino-NThe reaction of nitrogen compounds with ninhydrin can be used as an indicator of cytoplasmic materials released from microbial cells killed by fumigation. Total-N, ninhydrin-reactive-N (NR-N), ammonium-N (A-N), and α-amino-N in the microbial biomass of soils from the State of Rio Grande do Sul, Brazil, were determined, in 1996, in 0.5 mol L-1 K2SO4 extracts of fumigated and non-fumigated soils. Total-N varied from 20.3 to 104.4 mg kg-1 and the ninhydrin-reactive-N corresponded, in average, to 27% of this. The ninhydrin-reactive-N was made up of 67% ammonium-N and 33% aminoacids with the amino group at the α-carbon position. It was concluded that colorimetric analysis of NR-N and A-N may be used as a direct measure of microbial N in soil. This simple and rapid procedure is adequate for routine analyses.Sociedade Brasileira de Ciência do Solo1999-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06831999000100022Revista Brasileira de Ciência do Solo v.23 n.1 1999reponame:Revista Brasileira de Ciência do Solo (Online)instname:Sociedade Brasileira de Ciência do Solo (SBCS)instacron:SBCS10.1590/S0100-06831999000100022info:eu-repo/semantics/openAccessCamargo,F. A.O.Gianello,C.Vidor,C.eng2014-10-07T00:00:00Zoai:scielo:S0100-06831999000100022Revistahttp://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:2014-10-07T00:00Revista Brasileira de Ciência do Solo (Online) - Sociedade Brasileira de Ciência do Solo (SBCS)false |
dc.title.none.fl_str_mv |
Nitrogen fractions in the microbial biomass in soils of southern Brazil |
title |
Nitrogen fractions in the microbial biomass in soils of southern Brazil |
spellingShingle |
Nitrogen fractions in the microbial biomass in soils of southern Brazil Camargo,F. A.O. Biomass-N biomass ninhydrin-reactive-N biomass ammonium-N biomass α-amino-N |
title_short |
Nitrogen fractions in the microbial biomass in soils of southern Brazil |
title_full |
Nitrogen fractions in the microbial biomass in soils of southern Brazil |
title_fullStr |
Nitrogen fractions in the microbial biomass in soils of southern Brazil |
title_full_unstemmed |
Nitrogen fractions in the microbial biomass in soils of southern Brazil |
title_sort |
Nitrogen fractions in the microbial biomass in soils of southern Brazil |
author |
Camargo,F. A.O. |
author_facet |
Camargo,F. A.O. Gianello,C. Vidor,C. |
author_role |
author |
author2 |
Gianello,C. Vidor,C. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Camargo,F. A.O. Gianello,C. Vidor,C. |
dc.subject.por.fl_str_mv |
Biomass-N biomass ninhydrin-reactive-N biomass ammonium-N biomass α-amino-N |
topic |
Biomass-N biomass ninhydrin-reactive-N biomass ammonium-N biomass α-amino-N |
description |
The reaction of nitrogen compounds with ninhydrin can be used as an indicator of cytoplasmic materials released from microbial cells killed by fumigation. Total-N, ninhydrin-reactive-N (NR-N), ammonium-N (A-N), and α-amino-N in the microbial biomass of soils from the State of Rio Grande do Sul, Brazil, were determined, in 1996, in 0.5 mol L-1 K2SO4 extracts of fumigated and non-fumigated soils. Total-N varied from 20.3 to 104.4 mg kg-1 and the ninhydrin-reactive-N corresponded, in average, to 27% of this. The ninhydrin-reactive-N was made up of 67% ammonium-N and 33% aminoacids with the amino group at the α-carbon position. It was concluded that colorimetric analysis of NR-N and A-N may be used as a direct measure of microbial N in soil. This simple and rapid procedure is adequate for routine analyses. |
publishDate |
1999 |
dc.date.none.fl_str_mv |
1999-03-01 |
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=S0100-06831999000100022 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06831999000100022 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0100-06831999000100022 |
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 |
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.23 n.1 1999 reponame:Revista Brasileira de Ciência do Solo (Online) instname:Sociedade Brasileira de Ciência do Solo (SBCS) instacron:SBCS |
instname_str |
Sociedade Brasileira de Ciência do Solo (SBCS) |
instacron_str |
SBCS |
institution |
SBCS |
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) |
repository.mail.fl_str_mv |
||sbcs@ufv.br |
_version_ |
1752126508903694336 |