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Registro Completo |
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Biblioteca(s): |
Embrapa Pecuária Sul. |
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Data corrente: |
03/11/2015 |
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Data da última atualização: |
10/03/2016 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SOUZA, C. G.; RIBEIRO, L. da S.; SISTI, R. N.; PEREZ, N. B. |
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Afiliação: |
Camila Garcia Souza, URCAMP; Luiza da Silveira Ribeiro, URCAMP; RODISON NATIVIDADE SISTI, CPPSUL; NAYLOR BASTIANI PEREZ, CPPSUL. |
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Título: |
Reinfestação por capim-annoni após cinco anos de integração lavoura-pecuária. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: SIMPÓSIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA PECUÁRIA SUL, 5., 2015, Bagé. Resumos dos trabalhos... Bagé: Embrapa Pecuária Sul, 2015. |
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Páginas: |
p. 32. |
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Idioma: |
Português |
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Notas: |
Editora técnica Claudia Cristina Gulias Gomes. |
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Conteúdo: |
O experimento foi conduzido na Embrapa Pecuária Sul, na tentativa de reverter a infestação em campo nativo severamente invadido. |
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Palavras-Chave: |
Enxada química. |
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Thesagro: |
Eragrostis plana; Erva daninha. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/132241/1/Souza-et-al.pdf
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Marc: |
LEADER 00855nam a2200205 a 4500
001 2027719
005 2016-03-10
008 2015 bl uuuu u00u1 u #d
100 1 $aSOUZA, C. G.
245 $aReinfestação por capim-annoni após cinco anos de integração lavoura-pecuária.$h[electronic resource]
260 $aIn: SIMPÓSIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA PECUÁRIA SUL, 5., 2015, Bagé. Resumos dos trabalhos... Bagé: Embrapa Pecuária Sul$c2015
300 $ap. 32.
500 $aEditora técnica Claudia Cristina Gulias Gomes.
520 $aO experimento foi conduzido na Embrapa Pecuária Sul, na tentativa de reverter a infestação em campo nativo severamente invadido.
650 $aEragrostis plana
650 $aErva daninha
653 $aEnxada química
700 1 $aRIBEIRO, L. da S.
700 1 $aSISTI, R. N.
700 1 $aPEREZ, N. B.
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Registro original: |
Embrapa Pecuária Sul (CPPSUL) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
05/11/2013 |
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Data da última atualização: |
02/03/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
RACHID, C. T. C. C.; BALIEIRO, F. de C.; PEIXOTO, R. S.; PINHEIRO, Y, A. S.; PICOLLO, M. C.; CHAER, G. M. |
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Afiliação: |
FABIANO DE CARVALHO BALIEIRO, CNPS; GUILHERME MONTANDON CHAER, CNPAB. |
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Título: |
Mixed plantations can promote microbial integration and soil nitrate increases with changes in the N cycling genes. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
Soil Biology & Biochemistry, v. 66, p. 146-153, 2013. |
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Idioma: |
Português |
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Conteúdo: |
Mixed-species plantations of Eucalyptus and legume trees can symbiotically fix nitrogen and potentially improve the soil quality and biomass productivity compared with a conventional Eucalyptus monoculture. In this study, we evaluated changes in the structure and abundance of different microbial groups and nitrogen cycle genes in mixed and pure plantations of Acacia mangium and Eucalyptus urograndis in an experimental area in southeastern Brazil. Soil samples (0e10 cm) collected in two- and three-year-old stands were submitted to chemical characterization and molecular analyses using DGGE and real time- PCR for bacteria (16S rRNA), fungi (ITS), and genes involved in nitrogen cycling (nirK, amoA, nifH). The mixed plantation did not significantly change general soil fertility or total soil C and N content compared with the Eucalyptus monoculture. However, there was a significant increase in available phosphorus and soil nitrate content in both the A. mangium and mixed-species treatments. The multivariate ordination of the DGGE profiles of bacteria, fungi and archaea groups showed distinct community structures in each treatment. Significant differences in the abundance of copies of the target genes were found for fungi, with higher values in the Eucalyptus followed by the mixed and A. mangium plantations. The analysis of nitrogen cycle genes showed no clear difference in the communities of nitrogen fixing bacteria or nitrifying archaea among treatments. The nitrification activity was dominated by archaea because it was not possible to detect the presence of bacterial nitrifiers; the denitrifier community had a distinct profile in the Eucalyptus monoculture. The abundance of archaeal amoA and nirK genes suggests that the A. mangium treatment had higher nitrification and lower denitrification than the other treatments, which would explain the higher soil nitrate levels found in pure A. mangium treatments. Our data suggest that mixed plantations of E. urograndis and A. mangium result in a distinct microbial community relative to the respective monocultures with positive effects on soil phosphorus and nitrate content, which potentially reduces the need for anthropogenic fertilization. MenosMixed-species plantations of Eucalyptus and legume trees can symbiotically fix nitrogen and potentially improve the soil quality and biomass productivity compared with a conventional Eucalyptus monoculture. In this study, we evaluated changes in the structure and abundance of different microbial groups and nitrogen cycle genes in mixed and pure plantations of Acacia mangium and Eucalyptus urograndis in an experimental area in southeastern Brazil. Soil samples (0e10 cm) collected in two- and three-year-old stands were submitted to chemical characterization and molecular analyses using DGGE and real time- PCR for bacteria (16S rRNA), fungi (ITS), and genes involved in nitrogen cycling (nirK, amoA, nifH). The mixed plantation did not significantly change general soil fertility or total soil C and N content compared with the Eucalyptus monoculture. However, there was a significant increase in available phosphorus and soil nitrate content in both the A. mangium and mixed-species treatments. The multivariate ordination of the DGGE profiles of bacteria, fungi and archaea groups showed distinct community structures in each treatment. Significant differences in the abundance of copies of the target genes were found for fungi, with higher values in the Eucalyptus followed by the mixed and A. mangium plantations. The analysis of nitrogen cycle genes showed no clear difference in the communities of nitrogen fixing bacteria or nitrifying archaea among treatments. The nitrification activi... Mostrar Tudo |
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Palavras-Chave: |
Forest microbiology; Microbial diversity; Mixed plantation; N cycling genes. |
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Thesaurus NAL: |
Acacia mangium; Eucalyptus. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02970naa a2200253 a 4500
001 1970359
005 2015-03-02
008 2013 bl uuuu u00u1 u #d
100 1 $aRACHID, C. T. C. C.
245 $aMixed plantations can promote microbial integration and soil nitrate increases with changes in the N cycling genes.
260 $c2013
520 $aMixed-species plantations of Eucalyptus and legume trees can symbiotically fix nitrogen and potentially improve the soil quality and biomass productivity compared with a conventional Eucalyptus monoculture. In this study, we evaluated changes in the structure and abundance of different microbial groups and nitrogen cycle genes in mixed and pure plantations of Acacia mangium and Eucalyptus urograndis in an experimental area in southeastern Brazil. Soil samples (0e10 cm) collected in two- and three-year-old stands were submitted to chemical characterization and molecular analyses using DGGE and real time- PCR for bacteria (16S rRNA), fungi (ITS), and genes involved in nitrogen cycling (nirK, amoA, nifH). The mixed plantation did not significantly change general soil fertility or total soil C and N content compared with the Eucalyptus monoculture. However, there was a significant increase in available phosphorus and soil nitrate content in both the A. mangium and mixed-species treatments. The multivariate ordination of the DGGE profiles of bacteria, fungi and archaea groups showed distinct community structures in each treatment. Significant differences in the abundance of copies of the target genes were found for fungi, with higher values in the Eucalyptus followed by the mixed and A. mangium plantations. The analysis of nitrogen cycle genes showed no clear difference in the communities of nitrogen fixing bacteria or nitrifying archaea among treatments. The nitrification activity was dominated by archaea because it was not possible to detect the presence of bacterial nitrifiers; the denitrifier community had a distinct profile in the Eucalyptus monoculture. The abundance of archaeal amoA and nirK genes suggests that the A. mangium treatment had higher nitrification and lower denitrification than the other treatments, which would explain the higher soil nitrate levels found in pure A. mangium treatments. Our data suggest that mixed plantations of E. urograndis and A. mangium result in a distinct microbial community relative to the respective monocultures with positive effects on soil phosphorus and nitrate content, which potentially reduces the need for anthropogenic fertilization.
650 $aAcacia mangium
650 $aEucalyptus
653 $aForest microbiology
653 $aMicrobial diversity
653 $aMixed plantation
653 $aN cycling genes
700 1 $aBALIEIRO, F. de C.
700 1 $aPEIXOTO, R. S.
700 1 $aPINHEIRO, Y, A. S.
700 1 $aPICOLLO, M. C.
700 1 $aCHAER, G. M.
773 $tSoil Biology & Biochemistry$gv. 66, p. 146-153, 2013.
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