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| Registros recuperados : 9 | |
| 4. |  | SISTI, C. P. J.; SANTOS, H. P. dos; KOHHANN, R.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Change in carbon and nitrogen stocks in soil under 13 years of conventional or zero tillage in southern Brazil. Soil & Tillage Research, Amsterdam, v. 76, p. 39-58, 2004.| Biblioteca(s): Embrapa Agrobiologia. |
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| 5. | | SISTI, C. P. J.; SANTOS, H. P.; DENARDIN, J. E.; KOCHHANN, R.; LHAMBY, J. C.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Efeito de diferentes rotações de culturas no estoque de carbono e nitrogênio do solo, em sistema plantio direto. Seropédica: Embrapa Agrobiologia, 2003. 6 p. Trabalho apresentado no XXIX Congresso Brasileiro de Ciência do Solo, Ribeirão Preto, 2003.| Biblioteca(s): Embrapa Agrobiologia. |
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| 6. | | SISTI, C. P. J.; SANTOS, H. P.; DENARDIN, J. E.; KOCHHANN, R.; LHAMBY, J. C.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Efeito de diferentes rotações de culturas no estoque de carbono e nitrogênio do solo, em sistema de plantio direto. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 29., 2003, Ribeirão Preto. Resumos... Botucatu: SBCS, 2003. 4 p.| Biblioteca(s): Embrapa Agrobiologia. |
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| 7. | | GARCIA, P. C. M.; MACEDO, M. O.; BODDEY, R. M.; SISTI, C. P. J.; URQUIAGA, S.; CAMPELLO, E. F. C.; FRANCO, A. A.; RESENDE, A. S. Serapilheira acumulada e estoque de carbono e nitrogênio no solo em uma área revegetada em Angra dos Reis, RJ. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 30., 2005, Recife. Solos: sustentabilidade e qualidade ambiental. Recife: Sociedade Brasileira de Ciência do Solo, 2005. 4 p. CD ROM.| Biblioteca(s): Embrapa Agrobiologia. |
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| 8. | | MACEDO, M. O.; GARCIA, P. C. M.; BODDEY, R. M.; SISTI, C. P. J.; CAMPELLO, E. F. C.; URQUIAGA, S.; FRANCO, A. A.; RESENDE, A. S. Estoques de carbono e nitrogênio da serrapilheira e do solo em áreas recuperadas com leguminosas arbóreas micorrizadas e noduladas. In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 30., 2005, Recife. Solos: sustentabilidade e qualidade ambiental. Recife: Sociedade Brasileira de Ciência do Solo, 2005. 4 p. CD ROM.| Biblioteca(s): Embrapa Agrobiologia. |
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| Registros recuperados : 9 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
09/08/2004 |
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Data da última atualização: |
09/05/2005 |
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Autoria: |
SISTI, C. P. J.; SANTOS, H. P. dos; KOHHANN, R.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. |
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Título: |
Change in carbon and nitrogen stocks in soil under 13 years of conventional or zero tillage in southern Brazil. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Soil & Tillage Research, Amsterdam, v. 76, p. 39-58, 2004. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to determine in a long-term experiment 13 years the effect different crop rotations R1: wheat ( Triticum aestivum) - soybeam ( Glycine max), R2: wheat - soybean-vetch ( Vicia villosa)- maize (Zea mays), and R3: wheat-soybeam-oat (Avena sativa)- soybean-vetch-maize) under zero tillage (ZT) and conventional tillage (CT) on the stocks of soil organic matter (SOM) in a clayey Oxizol soil of Passo Fundo, Rio Grande do Sul. At the end of 13 years, soil samples were taken to a depth of 100 cm, and analused for bulk density, chemicla composition and 13C natural abudance. Under a continuous sequense of wheat (winter) and soybean ( summer) the stocks of soil organic C to 100 cm deph under ZT (168 Mg há-1 ) was not significantly different (LSD at P= 0.05 of 11 Mg há-1 ) to that under CT (168 Mg há-1 ) However, in the rotations with vetch planted as a winter gree-manure crop (R2 and R3), soil C stocks were approximately 17 Mg há-1 higher under ZT than under CT. Between 46 and 8% of this difference occurred at 30-85 cm deph. The 13C abundance data indicated that under ZT the decomposition of the original native SOM was not affected by the different composition of crops in the different rotations, but under CT the rotations R2 nad R3, which included vetch and maize, stimulated the decay of the original native SOM compared to the continuous wheat/soybean sequence (R1). It appears that the contribution of N² fixation by the leguminous green manure (vetch) in the cropping system was the principal factor responsiblefor the observed C accumulation in the soil under ZT, and that most accumulated C was derived from crop roots. MenosThe objective of this study was to determine in a long-term experiment 13 years the effect different crop rotations R1: wheat ( Triticum aestivum) - soybeam ( Glycine max), R2: wheat - soybean-vetch ( Vicia villosa)- maize (Zea mays), and R3: wheat-soybeam-oat (Avena sativa)- soybean-vetch-maize) under zero tillage (ZT) and conventional tillage (CT) on the stocks of soil organic matter (SOM) in a clayey Oxizol soil of Passo Fundo, Rio Grande do Sul. At the end of 13 years, soil samples were taken to a depth of 100 cm, and analused for bulk density, chemicla composition and 13C natural abudance. Under a continuous sequense of wheat (winter) and soybean ( summer) the stocks of soil organic C to 100 cm deph under ZT (168 Mg há-1 ) was not significantly different (LSD at P= 0.05 of 11 Mg há-1 ) to that under CT (168 Mg há-1 ) However, in the rotations with vetch planted as a winter gree-manure crop (R2 and R3), soil C stocks were approximately 17 Mg há-1 higher under ZT than under CT. Between 46 and 8% of this difference occurred at 30-85 cm deph. The 13C abundance data indicated that under ZT the decomposition of the original native SOM was not affected by the different composition of crops in the different rotations, but under CT the rotations R2 nad R3, which included vetch and maize, stimulated the decay of the original native SOM compared to the continuous wheat/soybean sequence (R1). It appears that the contribution of N² fixation by the leguminous green manure (vetch... Mostrar Tudo |
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Palavras-Chave: |
C; Direct sowing; Maize; N; Rotational cropping; Wheats; Zero tillage. |
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Thesagro: |
Adubação Verde; Avena Sativa; Carbono; Glycine Max; Matéria Orgânica; Milho; Nitrogênio; Plantio Direto; Rotação de Cultura; Soja; Solo; Trigo; Triticum Aestivum; Vicia Villosa; Zea Mays. |
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Thesaurus NAL: |
carbon; green manures; nitrogen; organic matter; soil; soybeans. |
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Categoria do assunto: |
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Marc: |
LEADER 02974naa a2200517 a 4500
001 1628145
005 2005-05-09
008 2004 bl --- 0-- u #d
100 1 $aSISTI, C. P. J.
245 $aChange in carbon and nitrogen stocks in soil under 13 years of conventional or zero tillage in southern Brazil.
260 $c2004
520 $aThe objective of this study was to determine in a long-term experiment 13 years the effect different crop rotations R1: wheat ( Triticum aestivum) - soybeam ( Glycine max), R2: wheat - soybean-vetch ( Vicia villosa)- maize (Zea mays), and R3: wheat-soybeam-oat (Avena sativa)- soybean-vetch-maize) under zero tillage (ZT) and conventional tillage (CT) on the stocks of soil organic matter (SOM) in a clayey Oxizol soil of Passo Fundo, Rio Grande do Sul. At the end of 13 years, soil samples were taken to a depth of 100 cm, and analused for bulk density, chemicla composition and 13C natural abudance. Under a continuous sequense of wheat (winter) and soybean ( summer) the stocks of soil organic C to 100 cm deph under ZT (168 Mg há-1 ) was not significantly different (LSD at P= 0.05 of 11 Mg há-1 ) to that under CT (168 Mg há-1 ) However, in the rotations with vetch planted as a winter gree-manure crop (R2 and R3), soil C stocks were approximately 17 Mg há-1 higher under ZT than under CT. Between 46 and 8% of this difference occurred at 30-85 cm deph. The 13C abundance data indicated that under ZT the decomposition of the original native SOM was not affected by the different composition of crops in the different rotations, but under CT the rotations R2 nad R3, which included vetch and maize, stimulated the decay of the original native SOM compared to the continuous wheat/soybean sequence (R1). It appears that the contribution of N² fixation by the leguminous green manure (vetch) in the cropping system was the principal factor responsiblefor the observed C accumulation in the soil under ZT, and that most accumulated C was derived from crop roots.
650 $acarbon
650 $agreen manures
650 $anitrogen
650 $aorganic matter
650 $asoil
650 $asoybeans
650 $aAdubação Verde
650 $aAvena Sativa
650 $aCarbono
650 $aGlycine Max
650 $aMatéria Orgânica
650 $aMilho
650 $aNitrogênio
650 $aPlantio Direto
650 $aRotação de Cultura
650 $aSoja
650 $aSolo
650 $aTrigo
650 $aTriticum Aestivum
650 $aVicia Villosa
650 $aZea Mays
653 $aC
653 $aDirect sowing
653 $aMaize
653 $aN
653 $aRotational cropping
653 $aWheats
653 $aZero tillage
700 1 $aSANTOS, H. P. dos
700 1 $aKOHHANN, R.
700 1 $aALVES, B. J. R.
700 1 $aURQUIAGA, S.
700 1 $aBODDEY, R. M.
773 $tSoil & Tillage Research, Amsterdam$gv. 76, p. 39-58, 2004.
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