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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
27/11/2000 |
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Data da última atualização: |
10/01/2005 |
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Autoria: |
MOLINA, J. A. E.; CLAPP, C. E.; LINDEN, D. R.; ALLMARAS, R. R.; LAYESE, M. F.; DOWDY, R. H.; CHENG, H. H. |
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Título: |
Modeling the incorporation of corn (Zea mays L.) carbon from roots and rhizodeposition into soil organic matter. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Soil Biology & Biochemistry, Oxford, v. 33, n. 1, p. 83-92, Jan. 2001. |
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Idioma: |
Inglês |
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Conteúdo: |
Experimental data reported in the literature over the last decennium indicate that roots and rhizodeposition are important sources of carbon for the synthesis of soil organic carbon. Our objective was to verify the capability of the simulation model NCSWAP to reproduce the general conclusions from the experimental literature, and to gain some insight about the processes that control the incorporation of corn below-ground production into the soil organic matter. The model was calibrated against the experimental data gathered from a long-term field experiment located near St. Paul, Minnesota. The simulation model updated daily the soil conditions to reproduce over a 13 year period the measured kinetics of seven variables: above-ground corn production, and the total soil organic matter, soil value, and the soil organic matter derived from corn in the 0?15 and 15?30 cm depth. The simulation gave a root-plus-rhizodeposition 1.8 times larger than stalks plus leaves. The translocation efficiency of corn-C into soil organic C at the 0?15 cm depth gradually decreased to 0.19 of the below-ground deposition. The sensitivity of below-ground photosynthate incorporation into the soil organic matter was analyzed relative to variations in the parameters that control the formation and decay of roots and rhizodeposition. Roots had a greater effect than rhizodeposition on the soil organic matter, though more photosynthates were translocated to rhizodeposition than to roots. |
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Palavras-Chave: |
Carbono organico; Exudates; Lignim; Natural C enrichment; organics matter; Tracer C. |
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Thesagro: |
Matéria Orgânica; Milho; Solo; Zea Mays. |
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Thesaurus Nal: |
rhizosphere; soil organic carbon. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02410naa a2200337 a 4500
001 1458958
005 2005-01-10
008 2001 bl --- 0-- u #d
100 1 $aMOLINA, J. A. E.
245 $aModeling the incorporation of corn (Zea mays L.) carbon from roots and rhizodeposition into soil organic matter.
260 $c2001
520 $aExperimental data reported in the literature over the last decennium indicate that roots and rhizodeposition are important sources of carbon for the synthesis of soil organic carbon. Our objective was to verify the capability of the simulation model NCSWAP to reproduce the general conclusions from the experimental literature, and to gain some insight about the processes that control the incorporation of corn below-ground production into the soil organic matter. The model was calibrated against the experimental data gathered from a long-term field experiment located near St. Paul, Minnesota. The simulation model updated daily the soil conditions to reproduce over a 13 year period the measured kinetics of seven variables: above-ground corn production, and the total soil organic matter, soil value, and the soil organic matter derived from corn in the 0?15 and 15?30 cm depth. The simulation gave a root-plus-rhizodeposition 1.8 times larger than stalks plus leaves. The translocation efficiency of corn-C into soil organic C at the 0?15 cm depth gradually decreased to 0.19 of the below-ground deposition. The sensitivity of below-ground photosynthate incorporation into the soil organic matter was analyzed relative to variations in the parameters that control the formation and decay of roots and rhizodeposition. Roots had a greater effect than rhizodeposition on the soil organic matter, though more photosynthates were translocated to rhizodeposition than to roots.
650 $arhizosphere
650 $asoil organic carbon
650 $aMatéria Orgânica
650 $aMilho
650 $aSolo
650 $aZea Mays
653 $aCarbono organico
653 $aExudates
653 $aLignim
653 $aNatural C enrichment
653 $aorganics matter
653 $aTracer C
700 1 $aCLAPP, C. E.
700 1 $aLINDEN, D. R.
700 1 $aALLMARAS, R. R.
700 1 $aLAYESE, M. F.
700 1 $aDOWDY, R. H.
700 1 $aCHENG, H. H.
773 $tSoil Biology & Biochemistry, Oxford$gv. 33, n. 1, p. 83-92, Jan. 2001.
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Embrapa Soja (CNPSO) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Soja. Para informações adicionais entre em contato com valeria.cardoso@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
19/05/2005 |
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Data da última atualização: |
07/07/2005 |
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Autoria: |
BASSOI, M. C.; BRUNETTA, D.; DOTTO, S. R.; TAVARES, L. C. V.; SCHEEREN, P. L.; ANDREOLI, C. |
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Título: |
Ensaios preliminares. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
In: SARAIVA, O. F. (Org.). Resultados de pesquisa da Embrapa Soja - 2003: trigo. Londrina: Embrapa Soja, 2004. |
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Páginas: |
p. 13-20. |
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Série: |
(Embrapa Soja. Documentos, 241). |
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Idioma: |
Português |
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Conteúdo: |
Multplicação de semente genética. |
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Thesagro: |
Melhoramento; Trigo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00670naa a2200229 a 4500
001 1449328
005 2005-07-07
008 2004 bl uuuu u00u1 u #d
100 1 $aBASSOI, M. C.
245 $aEnsaios preliminares.
260 $c2004
300 $ap. 13-20.
490 $a(Embrapa Soja. Documentos, 241).
520 $aMultplicação de semente genética.
650 $aMelhoramento
650 $aTrigo
700 1 $aBRUNETTA, D.
700 1 $aDOTTO, S. R.
700 1 $aTAVARES, L. C. V.
700 1 $aSCHEEREN, P. L.
700 1 $aANDREOLI, C.
773 $tIn: SARAIVA, O. F. (Org.). Resultados de pesquisa da Embrapa Soja - 2003: trigo. Londrina: Embrapa Soja, 2004.
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