| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Soja. |
|
Data corrente: |
09/10/2013 |
|
Data da última atualização: |
07/03/2014 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
SILVA, A. P.; BABUJIA, L. S.; MATSUMOTO, M. F.; GUIMARÃES, M. F.; HUNGRIA, M. |
|
Afiliação: |
UEL; UEM; UENP; UEL; MARIANGELA HUNGRIA DA CUNHA, CNPSO. |
|
Título: |
Bacterial diversity under different tillage and crop rotation systems in an oxisol of Southern Brazil. |
|
Ano de publicação: |
2013 |
|
Fonte/Imprenta: |
The Open Agriculture Journal, v. 7, Suppl 1-M6, p. 40-47, 2013. |
|
Idioma: |
Inglês |
|
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 |
|
Thesagro: |
Solo. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/90739/1/bacterial-diversity.pdf
|
|
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.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Soja (CNPSO) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Meio-Norte. |
|
Data corrente: |
19/11/1993 |
|
Data da última atualização: |
16/01/2014 |
|
Tipo da produção científica: |
Documentos |
|
Autoria: |
CAMPELO, G. J. de A. |
|
Afiliação: |
GILSON JESUS DE AZEVEDO CAMPELO, EMBRAPA-UEPAE de Teresina. |
|
Título: |
Producao vegetal: tecnologias geradas e seus beneficios para a agricultura piauiense. |
|
Ano de publicação: |
1990 |
|
Fonte/Imprenta: |
Teresina: EMBRAPA-UEPAE de Teresina, 1990. |
|
Páginas: |
16p. |
|
Série: |
(EMBRAPA-UEPAE de Teresina. Documentos, 10) |
|
Idioma: |
Português |
|
Conteúdo: |
As investigacoes cientificas dirigem-se para a obtencao de tecnologiaspara as regioes semi-aridas e a EMBRAPA-UEPAE de Teresina vem estudando a adaptacao de genotipos buscando aumentar a produtividade, alem de elevar a renda do produtor rural atraves da reducao dos custos de producao. Foram apresentadas as tecnologias apropriadas para a cultura do algodao, amendoim, arroz, feijao, mamona, mandioca, milho, soja e sorgo, possibilitando o aumento da produtividade agricola para o fortalecimento da economia estadual. |
|
Palavras-Chave: |
Agricultural production; AGRICULTURAS; Agriculture production; Brasil; Piaui; Production; Vegetal production. |
|
Thesagro: |
Agricultura; Produção; Produção Agrícola; Produção Vegetal; Tecnologia. |
|
Thesaurus NAL: |
agriculture; Brazil; technology. |
|
Categoria do assunto: |
--
X Pesquisa, Tecnologia e Engenharia |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/95402/1/DOC100001.pdf
|
|
Marc: |
LEADER 01381nam a2200313 a 4500
001 1050200
005 2014-01-16
008 1990 bl uuuu u0uu1 u #d
100 1 $aCAMPELO, G. J. de A.
245 $aProducao vegetal$btecnologias geradas e seus beneficios para a agricultura piauiense.
260 $aTeresina: EMBRAPA-UEPAE de Teresina$c1990
300 $a16p.
490 $a(EMBRAPA-UEPAE de Teresina. Documentos, 10)
520 $aAs investigacoes cientificas dirigem-se para a obtencao de tecnologiaspara as regioes semi-aridas e a EMBRAPA-UEPAE de Teresina vem estudando a adaptacao de genotipos buscando aumentar a produtividade, alem de elevar a renda do produtor rural atraves da reducao dos custos de producao. Foram apresentadas as tecnologias apropriadas para a cultura do algodao, amendoim, arroz, feijao, mamona, mandioca, milho, soja e sorgo, possibilitando o aumento da produtividade agricola para o fortalecimento da economia estadual.
650 $aagriculture
650 $aBrazil
650 $atechnology
650 $aAgricultura
650 $aProdução
650 $aProdução Agrícola
650 $aProdução Vegetal
650 $aTecnologia
653 $aAgricultural production
653 $aAGRICULTURAS
653 $aAgriculture production
653 $aBrasil
653 $aPiaui
653 $aProduction
653 $aVegetal production
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Meio-Norte (CPAMN) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
