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Registro Completo |
Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
07/08/2013 |
Data da última atualização: |
08/11/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
RACHID, C. T. C. C.; BALIEIRO, F. de C.; PEIXOTO, R. S.; PINHEIRO, Y. A. S.; PICCOLO, M. C.; CHAER, G. M.; ROSADO, A. S. |
Afiliação: |
UFRJ; FABIANO DE CARVALHO BALIEIRO, CNPS; UFRJ; UFRJ; EMBRAPA AGROBIOLOGIA; UNIVERSIDADE DE SÃO PAULO; A. S. ROSADO, UFRJ. |
Título: |
Mixed plantations can promote microbial integration and soil nitrate increases with changes in the N cycling genes. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
Soil Biology & Biochemistry, v. 66, p. 146-153, Nov. 2013. |
DOI: |
https://doi.org/10.1016/j.soilbio.2013.07.005 |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Forest microbiology; Microbial diversity; Mixed plantation; N cycling genes. |
Thesaurus Nal: |
Acacia mangium; Eucalyptus. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 03095naa a2200277 a 4500 001 1963443 005 2021-11-08 008 2013 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.soilbio.2013.07.005$2DOI 100 1 $aRACHID, C. T. C. C. 245 $aMixed plantations can promote microbial integration and soil nitrate increases with changes in the N cycling genes.$h[electronic resource] 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 $aPICCOLO, M. C. 700 1 $aCHAER, G. M. 700 1 $aROSADO, A. S. 773 $tSoil Biology & Biochemistry$gv. 66, p. 146-153, Nov. 2013.
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Embrapa Solos (CNPS) |
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Biblioteca(s): |
Embrapa Algodão. |
Data corrente: |
12/03/2009 |
Data da última atualização: |
13/03/2009 |
Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
Autoria: |
CARVALHO, L. P. de; ANDRADE, C. C. de; SILVA, G. E. L.; ALENCAR, C. E. R. D.; LIMA, L. H. G. de M.; MEDEIROS, E. P. de; FREIRE, R. M. M.; LIMA, M. M. de A.; BRITO, G. G. de. |
Afiliação: |
Luiz Paulo de Carvalho, Embrapa Algodão; Catarina Chagas de Andrade, Estagiária; George Elton Lucena Silva, estagiário; Carlos Eduardo Rocha Duarte Alencar, estagiário; Leonardo Henrique Guedes de Morais Lima, bolsista; Everaldo Paulo de Medeiros, Embrapa Algodão; Rosa Maria Mendes Freire, Embrapa Algodão; Marleide Magalhães de Andrade Lima, Embrapa Algodão; Giovani Greigh de Brito, Embrapa Algodão. |
Título: |
Óleo de algodão: alternativa para biodiesel. |
Ano de publicação: |
2008 |
Fonte/Imprenta: |
Campina Grande: Embrapa Algodão, 2008. |
Páginas: |
9 p. |
Série: |
(Embrapa Algodão. Comunicado Técnico, 357). |
ISSN: |
0102-0099 |
Idioma: |
Português |
Thesagro: |
Algodão; Óleo. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CNPA-2009-09/22240/1/COMTEC357.pdf
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Marc: |
LEADER 00705nam a2200253 a 4500 001 1278123 005 2009-03-13 008 2008 bl uuuu u0uu1 u #d 022 $a0102-0099 100 1 $aCARVALHO, L. P. de 245 $aÓleo de algodão$balternativa para biodiesel. 260 $aCampina Grande: Embrapa Algodão$c2008 300 $a9 p. 490 $a(Embrapa Algodão. Comunicado Técnico, 357). 650 $aAlgodão 650 $aÓleo 700 1 $aANDRADE, C. C. de 700 1 $aSILVA, G. E. L. 700 1 $aALENCAR, C. E. R. D. 700 1 $aLIMA, L. H. G. de M. 700 1 $aMEDEIROS, E. P. de 700 1 $aFREIRE, R. M. M. 700 1 $aLIMA, M. M. de A. 700 1 $aBRITO, G. G. de
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