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Registro Completo |
Biblioteca(s): |
Embrapa Hortaliças; Embrapa Pecuária Sul; Embrapa Unidades Centrais. |
Data corrente: |
08/01/1991 |
Data da última atualização: |
04/12/2023 |
Autoria: |
GARCIA, A.; MADAIL, J. C. M. |
Afiliação: |
EMBRAPA-CNPFT. |
Título: |
Controle de invasoras em cebola para sementes. |
Ano de publicação: |
1985 |
Fonte/Imprenta: |
Pelotas : EMBRAPA-CNPFT, 1985. |
Páginas: |
21p. |
Série: |
(EMBRAPA-CNPFT. Boletim de Pesquisa, 11). |
Idioma: |
Português |
Palavras-Chave: |
Control; Controle; Invasora; Onion; Planta daninha; Production; Seed; Weed. |
Thesagro: |
Allium Cepa; Cebola; Produção; Semente. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00668nam a2200277 a 4500 001 2159112 005 2023-12-04 008 1985 bl uuuu u0uu1 u #d 100 1 $aGARCIA, A. 245 $aControle de invasoras em cebola para sementes. 260 $aPelotas : EMBRAPA-CNPFT$c1985 300 $a21p. 490 $a(EMBRAPA-CNPFT. Boletim de Pesquisa, 11). 650 $aAllium Cepa 650 $aCebola 650 $aProdução 650 $aSemente 653 $aControl 653 $aControle 653 $aInvasora 653 $aOnion 653 $aPlanta daninha 653 $aProduction 653 $aSeed 653 $aWeed 700 1 $aMADAIL, J. C. M.
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Embrapa Unidades Centrais (AI-SEDE) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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 |
Circulação/Nível: |
A - 1 |
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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