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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
24/03/2003 |
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Data da última atualização: |
21/12/2011 |
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Autoria: |
NEUFELDT, H.; RESCK, D. V. S.; AYARZA, M. A. |
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Título: |
Texture and land-use effects on soil organic matter in Cerrado Oxisols, Central Brazil. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Geoderma, Amsterdam, v. 107, p. 151-164, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
Due to the continuous agricultural expansion in the Brazilian Cerrados and the known adverse effects of agriculture on soil organic matter (SOM), SOM dynamics of typical Cerrado land-use systems were studied. Bulk soil samples and particle-size separates from clayey and loamy Oxisols under to characterise texture and tratament effects on SOM and to follow the alterations of organic compounds in the different particle-size fractions. The analyscs included na assessment of SOM, particulate organic matter (POM), polysaccharides, lignin oxidation products (VSC-lingnin), and scanning electron microscopy (SEM) of different particle-size fractions.The amounts of SOM, polysaccharides, and VSC-lignin were elearly higther in the clayey soils due to the increasing stabilisation of organic substances to the clay fraction. Conversely, the amounts of POM were comparable between the substrates resulting in a higher proportion of labile organic matter, and thus na overall greater lability of the loamy soils.Continuous cropping and reforestation with pine led to a clear redution of SOM contents, whereas pasture and eucalyptus reforestation might have increased both the amount and quality of SOM in relation to the Cerrado control.The analysis of particle-size separates showed the decline of lignin and plant-derived polysaccharides from the sand to the clay fraction, and na accumulation of microbially metabolised polysaccharides in the clay fraction, suggesting that humification and mineralisation of organic matter in Cerrado soils follow along a biogechemical gradient similar to that of temperate soils and climates. MenosDue to the continuous agricultural expansion in the Brazilian Cerrados and the known adverse effects of agriculture on soil organic matter (SOM), SOM dynamics of typical Cerrado land-use systems were studied. Bulk soil samples and particle-size separates from clayey and loamy Oxisols under to characterise texture and tratament effects on SOM and to follow the alterations of organic compounds in the different particle-size fractions. The analyscs included na assessment of SOM, particulate organic matter (POM), polysaccharides, lignin oxidation products (VSC-lingnin), and scanning electron microscopy (SEM) of different particle-size fractions.The amounts of SOM, polysaccharides, and VSC-lignin were elearly higther in the clayey soils due to the increasing stabilisation of organic substances to the clay fraction. Conversely, the amounts of POM were comparable between the substrates resulting in a higher proportion of labile organic matter, and thus na overall greater lability of the loamy soils.Continuous cropping and reforestation with pine led to a clear redution of SOM contents, whereas pasture and eucalyptus reforestation might have increased both the amount and quality of SOM in relation to the Cerrado control.The analysis of particle-size separates showed the decline of lignin and plant-derived polysaccharides from the sand to the clay fraction, and na accumulation of microbially metabolised polysaccharides in the clay fraction, suggesting that humification and mineralisa... Mostrar Tudo |
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Thesagro: |
Cerrado; Cobertura do Solo; Matéria Orgânica; Solo. |
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Categoria do assunto: |
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Marc: |
LEADER 02157naa a2200193 a 4500
001 1566612
005 2011-12-21
008 2002 bl --- 0-- u #d
100 1 $aNEUFELDT, H.
245 $aTexture and land-use effects on soil organic matter in Cerrado Oxisols, Central Brazil.
260 $c2002
520 $aDue to the continuous agricultural expansion in the Brazilian Cerrados and the known adverse effects of agriculture on soil organic matter (SOM), SOM dynamics of typical Cerrado land-use systems were studied. Bulk soil samples and particle-size separates from clayey and loamy Oxisols under to characterise texture and tratament effects on SOM and to follow the alterations of organic compounds in the different particle-size fractions. The analyscs included na assessment of SOM, particulate organic matter (POM), polysaccharides, lignin oxidation products (VSC-lingnin), and scanning electron microscopy (SEM) of different particle-size fractions.The amounts of SOM, polysaccharides, and VSC-lignin were elearly higther in the clayey soils due to the increasing stabilisation of organic substances to the clay fraction. Conversely, the amounts of POM were comparable between the substrates resulting in a higher proportion of labile organic matter, and thus na overall greater lability of the loamy soils.Continuous cropping and reforestation with pine led to a clear redution of SOM contents, whereas pasture and eucalyptus reforestation might have increased both the amount and quality of SOM in relation to the Cerrado control.The analysis of particle-size separates showed the decline of lignin and plant-derived polysaccharides from the sand to the clay fraction, and na accumulation of microbially metabolised polysaccharides in the clay fraction, suggesting that humification and mineralisation of organic matter in Cerrado soils follow along a biogechemical gradient similar to that of temperate soils and climates.
650 $aCerrado
650 $aCobertura do Solo
650 $aMatéria Orgânica
650 $aSolo
700 1 $aRESCK, D. V. S.
700 1 $aAYARZA, M. A.
773 $tGeoderma, Amsterdam$gv. 107, p. 151-164, 2002.
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Registro original: |
Embrapa Cerrados (CPAC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Recursos Genéticos e Biotecnologia. Para informações adicionais entre em contato com cenargen.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
01/04/2008 |
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Data da última atualização: |
13/05/2024 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
OLIVEIRA, S. O. D.; ALLAM, T. D.; FRAZÃO, H. S.; MICHEREFF FILHO, M.; FARIA, M. R. |
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Afiliação: |
SHARRINE OMARI DOMINGUES DE OLIVEIRA; THIAGO DIAS ALLAM; HELOISA DA SILVA FRAZÃO, EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA; MIGUEL MICHEREFF FILHO, EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA; MARCOS RODRIGUES DE FARIA, EMBRAPA RECURSOS GENÉTICOS E BIOTECNOLOGIA. |
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Título: |
Avaliação de formulações do fungo Beauveria bassiana para controle do pulgão Aphis gossypii (Hemiptera: Aphididae) em algodoeiro. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
In: SIMPÓSIO DE CONTROLE BIOLÓGICO, 10., 2007, Brasília, DF. Inovar para preservar a vida. Resumos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 2007. |
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Série: |
(Embrapa Recursos Genéticos e Biotecnologia. Documentos, 250). |
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Idioma: |
Português |
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Notas: |
ID 571. |
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Palavras-Chave: |
Pulgão Aphis gossypii. |
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Thesagro: |
Algodão; Beauveria Bassiana; Controle Biológico; Fungo. |
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Categoria do assunto: |
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Marc: |
LEADER 00878nam a2200229 a 4500
001 1189833
005 2024-05-13
008 2007 bl uuuu u01u1 u #d
100 1 $aOLIVEIRA, S. O. D.
245 $aAvaliação de formulações do fungo Beauveria bassiana para controle do pulgão Aphis gossypii (Hemiptera$bAphididae) em algodoeiro.
260 $aIn: SIMPÓSIO DE CONTROLE BIOLÓGICO, 10., 2007, Brasília, DF. Inovar para preservar a vida. Resumos. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia$c2007
490 $a(Embrapa Recursos Genéticos e Biotecnologia. Documentos, 250).
500 $aID 571.
650 $aAlgodão
650 $aBeauveria Bassiana
650 $aControle Biológico
650 $aFungo
653 $aPulgão Aphis gossypii
700 1 $aALLAM, T. D.
700 1 $aFRAZÃO, H. S.
700 1 $aMICHEREFF FILHO, M.
700 1 $aFARIA, M. R.
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Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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