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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
09/10/2013 |
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Data da última atualização: |
07/03/2014 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, A. P.; BABUJIA, L. S.; MATSUMOTO, M. F.; GUIMARÃES, M. F.; HUNGRIA, M. |
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Afiliação: |
UEL; UEM; UENP; UEL; MARIANGELA HUNGRIA DA CUNHA, CNPSO. |
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Título: |
Bacterial diversity under different tillage and crop rotation systems in an oxisol of Southern Brazil. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
The Open Agriculture Journal, v. 7, Suppl 1-M6, p. 40-47, 2013. |
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Idioma: |
Inglês |
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Conteúdo: |
Microbial diversity can be used to assess the impact of agricultural practices on the long-term sustainability of cropping systems. The aim of this study was to investigate changes in soil bacterial diversity as a result of the impact of different soil tillage and crop rotation systems in an oxisol of southern Brazil. Bacterial diversity was examined in the 0-10 cm layer in two field experiments by analyzing soil DNA using 16S rDNA-DGGE profiles. Experiment one consisted of a long-term 26-year trial with four soil tillage management systems: (1) no-tillage (NT), (2) disc plow (DP), (3) field cultivator (FC), and (4) heavy-disc harrow (DH), all under soybean (summer)/wheat (winter) crop succession. Experiment two consisted of a short-term 10-year trial with DP and NT and three crop rotations (CR) including grasses, legumes and green manures. Cluster analysis of the 16S rDNA sequences revealed that the main effect on clustering was attributed to differences in soil tillage management systems. The Shannon index confirmed greater bacterial diversity under NT, followed by the FC, DH and DP. Therefore, diversity decreased as tillage practices intensified. The evenness index demonstrated uniformity of the profiles of the bacterial communities, with dominance of a few communities, regardless of soil tillage and crop rotation. Different crop rotations had only minor effects on bacterial diversity, what could be related to a previous fallow period. The results suggest that bacterial diversity analyzed by DGGE may be useful as bioindicator of the changes caused by soil tillage. MenosMicrobial diversity can be used to assess the impact of agricultural practices on the long-term sustainability of cropping systems. The aim of this study was to investigate changes in soil bacterial diversity as a result of the impact of different soil tillage and crop rotation systems in an oxisol of southern Brazil. Bacterial diversity was examined in the 0-10 cm layer in two field experiments by analyzing soil DNA using 16S rDNA-DGGE profiles. Experiment one consisted of a long-term 26-year trial with four soil tillage management systems: (1) no-tillage (NT), (2) disc plow (DP), (3) field cultivator (FC), and (4) heavy-disc harrow (DH), all under soybean (summer)/wheat (winter) crop succession. Experiment two consisted of a short-term 10-year trial with DP and NT and three crop rotations (CR) including grasses, legumes and green manures. Cluster analysis of the 16S rDNA sequences revealed that the main effect on clustering was attributed to differences in soil tillage management systems. The Shannon index confirmed greater bacterial diversity under NT, followed by the FC, DH and DP. Therefore, diversity decreased as tillage practices intensified. The evenness index demonstrated uniformity of the profiles of the bacterial communities, with dominance of a few communities, regardless of soil tillage and crop rotation. Different crop rotations had only minor effects on bacterial diversity, what could be related to a previous fallow period. The results suggest that bacterial d... Mostrar Tudo |
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Thesagro: |
Solo. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/90739/1/bacterial-diversity.pdf
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Marc: |
LEADER 02151naa a2200181 a 4500
001 1968218
005 2014-03-07
008 2013 bl uuuu u00u1 u #d
100 1 $aSILVA, A. P.
245 $aBacterial diversity under different tillage and crop rotation systems in an oxisol of Southern Brazil.$h[electronic resource]
260 $c2013
520 $aMicrobial diversity can be used to assess the impact of agricultural practices on the long-term sustainability of cropping systems. The aim of this study was to investigate changes in soil bacterial diversity as a result of the impact of different soil tillage and crop rotation systems in an oxisol of southern Brazil. Bacterial diversity was examined in the 0-10 cm layer in two field experiments by analyzing soil DNA using 16S rDNA-DGGE profiles. Experiment one consisted of a long-term 26-year trial with four soil tillage management systems: (1) no-tillage (NT), (2) disc plow (DP), (3) field cultivator (FC), and (4) heavy-disc harrow (DH), all under soybean (summer)/wheat (winter) crop succession. Experiment two consisted of a short-term 10-year trial with DP and NT and three crop rotations (CR) including grasses, legumes and green manures. Cluster analysis of the 16S rDNA sequences revealed that the main effect on clustering was attributed to differences in soil tillage management systems. The Shannon index confirmed greater bacterial diversity under NT, followed by the FC, DH and DP. Therefore, diversity decreased as tillage practices intensified. The evenness index demonstrated uniformity of the profiles of the bacterial communities, with dominance of a few communities, regardless of soil tillage and crop rotation. Different crop rotations had only minor effects on bacterial diversity, what could be related to a previous fallow period. The results suggest that bacterial diversity analyzed by DGGE may be useful as bioindicator of the changes caused by soil tillage.
650 $aSolo
700 1 $aBABUJIA, L. S.
700 1 $aMATSUMOTO, M. F.
700 1 $aGUIMARÃES, M. F.
700 1 $aHUNGRIA, M.
773 $tThe Open Agriculture Journal$gv. 7, Suppl 1-M6, p. 40-47, 2013.
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Registro original: |
Embrapa Soja (CNPSO) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Pecuária Sudeste. Para informações adicionais entre em contato com cppse.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sudeste. |
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Data corrente: |
07/01/2002 |
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Data da última atualização: |
26/04/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
KAMOGAWA, M. Y.; NOGUEIRA, A. R. de A.; COSTA, L. M.; GARCIA, E. E.; NÓBREGA, J. A. |
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Afiliação: |
MARCOS Y. KAMOGAWA, UFSCAR; ANA RITA DE ARAUJO NOGUEIRA, CPPSE; LETICIA M. COSTA, UFSCAR; EDIVALDO E. GARCIA, UFSCAR; JOAQUIM A. NÓBREGA, UFSCAR. |
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Título: |
A new strategy for preparation of hair slurries using cryogenic grinding and water-soluble tertiary-amines medium. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Spectrochimica Acta Part B, v.56, p.1973-1980, 2001. |
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Idioma: |
Inglês |
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Palavras-Chave: |
Cryogenic grinding; Electrothermal atomization; Freezer; Mill; Water soluble tertiary. |
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Thesaurus NAL: |
atomic absorption spectrometry. |
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Categoria do assunto: |
W Química e Física |
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Marc: |
LEADER 00736naa a2200229 a 4500
001 1045883
005 2022-04-26
008 2001 bl uuuu u00u1 u #d
100 1 $aKAMOGAWA, M. Y.
245 $aA new strategy for preparation of hair slurries using cryogenic grinding and water-soluble tertiary-amines medium.$h[electronic resource]
260 $c2001
650 $aatomic absorption spectrometry
653 $aCryogenic grinding
653 $aElectrothermal atomization
653 $aFreezer
653 $aMill
653 $aWater soluble tertiary
700 1 $aNOGUEIRA, A. R. de A.
700 1 $aCOSTA, L. M.
700 1 $aGARCIA, E. E.
700 1 $aNÓBREGA, J. A.
773 $tSpectrochimica Acta Part B$gv.56, p.1973-1980, 2001.
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Embrapa Pecuária Sudeste (CPPSE) |
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