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Registro Completo |
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Biblioteca(s): |
Embrapa Agropecuária Oeste. |
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Data corrente: |
11/07/2007 |
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Data da última atualização: |
25/09/2012 |
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Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
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Autoria: |
OTSUBO, A. A.; OTUBO, S. T.; ZUFFO, N. L.; DEL PELOSO, M. J.; FARIA, L. C. de; MELO, L. C.; COSTA, J. G. C. da; RAVA, C. A.; CARNEIRO, G. E. de S.; SOARES, D. M.; DIAZ, J. L. C.; FARIA, J. C. de; SARTORATO, A.; MERCANTE, F. M. |
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Afiliação: |
Embrapa Agropecuária Oeste, Dourados, MS. |
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Título: |
BRS Vereda: nova cultivar de feijão do grupo Rosinha para Mato Grosso do Sul. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
Dourados: Embrapa Agropecuária Oeste, 2005. |
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Páginas: |
3 p. |
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Série: |
(Embrapa Agropecuária Oeste. Comunicado técnico, 113). |
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Idioma: |
Português |
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Notas: |
Documento on-line. |
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Palavras-Chave: |
Bean. |
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Thesagro: |
Feijão; Variedade. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/24679/1/COT2005113.pdf
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Marc: |
LEADER 00915nam a2200325 a 4500
001 1254504
005 2012-09-25
008 2005 bl uuuu u0uu1 u #d
100 1 $aOTSUBO, A. A.
245 $aBRS Vereda$bnova cultivar de feijão do grupo Rosinha para Mato Grosso do Sul.
260 $aDourados: Embrapa Agropecuária Oeste$c2005
300 $a3 p.
490 $a(Embrapa Agropecuária Oeste. Comunicado técnico, 113).
500 $aDocumento on-line.
650 $aFeijão
650 $aVariedade
653 $aBean
700 1 $aOTUBO, S. T.
700 1 $aZUFFO, N. L.
700 1 $aDEL PELOSO, M. J.
700 1 $aFARIA, L. C. de
700 1 $aMELO, L. C.
700 1 $aCOSTA, J. G. C. da
700 1 $aRAVA, C. A.
700 1 $aCARNEIRO, G. E. de S.
700 1 $aSOARES, D. M.
700 1 $aDIAZ, J. L. C.
700 1 $aFARIA, J. C. de
700 1 $aSARTORATO, A.
700 1 $aMERCANTE, F. M.
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Registro original: |
Embrapa Agropecuária Oeste (CPAO) |
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Voltar
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
28/04/2003 |
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Data da última atualização: |
28/04/2003 |
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Autoria: |
BAYER, C.; MIELNICZUK, J.; MARTIN-NETO, L.; ERNANI, P. R. |
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Afiliação: |
UFRGS, Departamento de Solos, Porto Alegre, RS; Embrapa Instrumentação Agropecuária, São Carlos, SP; UFSC, Departamento de Solos, Lages, SC. |
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Título: |
Stocks and humidification degree of organic matter fractions as affected by no-tillage on a subtropical soil. |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
Plant and Soil, Hague, v. 238, p. 133-140, 2002. |
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Idioma: |
Inglês |
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Conteúdo: |
Assessment of particulata (>53-mi) and mineral-associated (<53-mi) soil organic matter (SOM) fractions is a useful approach to understand the dynamic of organic matter in soils. This study aimed to compare the long-term (9-yr) effects of no-tillage (NT) and conventional tillage (CT) on C and N stocks in the two above mentioned organic fractions in a Brazilian Acrisol. The degree of SOM humification, which has been associated with the concentration of semiquinone-type free radicals ("spin") determined by electron spin resonance (ESR), was also evaluated. Soil under no-tillage had 7.55 Mg ha-1 (25%0 more C and 741 kg ha-1 (29%) more Ne than conventionally tilled soil in the 0-175-mm depth. Both particulate and mineral-associated SOM increased in the no-tilled soil. The incrase of C and N stocks in the mineral-associated SOM accounted for 75% and 91% of the difference in total soil C and N stocks between NT and CT, respectively. Averaged across tillage systems, C and N stocks were respectively 4.6 and 16.8 times higher in the mineal-associated SOM than in particulate SOM. The higher C and N stocks were associated with greater recalcitrance of mineral-associated SOM to biological decomposition, resultin, probably, from its interaction with variable charge minerals. This is corroborated by a positive relationship between concentrations of C and iron oxides and kaolinite in the 53-20, 20-2 and <2-mi particle size classes, of the 0-25-mm soil layer. The degree of SOM humification, assessed by ESR, decreased in both the 53-20 and 20-2-mi fractions under NT. However, it was unaffected by tillage in the <2-mi fraction, which mormally presented the lowest "spin" concentration. Since quality as well as quantity of SOM improved in the no-tillage soil, adoption of this system is highly recommended for amelioration of degraded tropical and sutropical solis. MenosAssessment of particulata (>53-mi) and mineral-associated (<53-mi) soil organic matter (SOM) fractions is a useful approach to understand the dynamic of organic matter in soils. This study aimed to compare the long-term (9-yr) effects of no-tillage (NT) and conventional tillage (CT) on C and N stocks in the two above mentioned organic fractions in a Brazilian Acrisol. The degree of SOM humification, which has been associated with the concentration of semiquinone-type free radicals ("spin") determined by electron spin resonance (ESR), was also evaluated. Soil under no-tillage had 7.55 Mg ha-1 (25%0 more C and 741 kg ha-1 (29%) more Ne than conventionally tilled soil in the 0-175-mm depth. Both particulate and mineral-associated SOM increased in the no-tilled soil. The incrase of C and N stocks in the mineral-associated SOM accounted for 75% and 91% of the difference in total soil C and N stocks between NT and CT, respectively. Averaged across tillage systems, C and N stocks were respectively 4.6 and 16.8 times higher in the mineal-associated SOM than in particulate SOM. The higher C and N stocks were associated with greater recalcitrance of mineral-associated SOM to biological decomposition, resultin, probably, from its interaction with variable charge minerals. This is corroborated by a positive relationship between concentrations of C and iron oxides and kaolinite in the 53-20, 20-2 and <2-mi particle size classes, of the 0-25-mm soil layer. The degree of SOM humification,... Mostrar Tudo |
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Palavras-Chave: |
Clima subtropical; Electron spin resonance; Grau de humificação; Particulate soil organic matter; Subtropical climate. |
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Thesagro: |
Matéria Orgânica; Solo. |
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Thesaurus NAL: |
no-tillage. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02632naa a2200253 a 4500
001 1024620
005 2003-04-28
008 2002 bl --- 0-- u #d
100 1 $aBAYER, C.
245 $aStocks and humidification degree of organic matter fractions as affected by no-tillage on a subtropical soil.
260 $c2002
520 $aAssessment of particulata (>53-mi) and mineral-associated (<53-mi) soil organic matter (SOM) fractions is a useful approach to understand the dynamic of organic matter in soils. This study aimed to compare the long-term (9-yr) effects of no-tillage (NT) and conventional tillage (CT) on C and N stocks in the two above mentioned organic fractions in a Brazilian Acrisol. The degree of SOM humification, which has been associated with the concentration of semiquinone-type free radicals ("spin") determined by electron spin resonance (ESR), was also evaluated. Soil under no-tillage had 7.55 Mg ha-1 (25%0 more C and 741 kg ha-1 (29%) more Ne than conventionally tilled soil in the 0-175-mm depth. Both particulate and mineral-associated SOM increased in the no-tilled soil. The incrase of C and N stocks in the mineral-associated SOM accounted for 75% and 91% of the difference in total soil C and N stocks between NT and CT, respectively. Averaged across tillage systems, C and N stocks were respectively 4.6 and 16.8 times higher in the mineal-associated SOM than in particulate SOM. The higher C and N stocks were associated with greater recalcitrance of mineral-associated SOM to biological decomposition, resultin, probably, from its interaction with variable charge minerals. This is corroborated by a positive relationship between concentrations of C and iron oxides and kaolinite in the 53-20, 20-2 and <2-mi particle size classes, of the 0-25-mm soil layer. The degree of SOM humification, assessed by ESR, decreased in both the 53-20 and 20-2-mi fractions under NT. However, it was unaffected by tillage in the <2-mi fraction, which mormally presented the lowest "spin" concentration. Since quality as well as quantity of SOM improved in the no-tillage soil, adoption of this system is highly recommended for amelioration of degraded tropical and sutropical solis.
650 $ano-tillage
650 $aMatéria Orgânica
650 $aSolo
653 $aClima subtropical
653 $aElectron spin resonance
653 $aGrau de humificação
653 $aParticulate soil organic matter
653 $aSubtropical climate
700 1 $aMIELNICZUK, J.
700 1 $aMARTIN-NETO, L.
700 1 $aERNANI, P. R.
773 $tPlant and Soil, Hague$gv. 238, p. 133-140, 2002.
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