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| 15. |  | TORMENA, C.A.; ROLOFF, G.; SÁ, J.C.M. Propriedades físicas do solo sob plantio direto influenciadas por calagem, preparo inicial e tráfego. Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 22, n. 2, p. 301-309, abr./jun. 1998.| Biblioteca(s): Epagri-Sede. |
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| 17. | | PETEAN, L. P.; TORMENA, C. A.; FIDALSKI, J.; ALVES, S. J. Altura de pastejo de aveia e azevém e qualidade física de um Latossolo Vermelho distroférrico sob integração lavoura-pecuária. Semina: Ciências Agrárias, Londrina, PR, v. 30, suplemento 1, p. 1009-1016, 2009.| Biblioteca(s): Epagri-Sede. |
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| 18. | | TRINTINALIO, J.; TORMENA, C. A.; OLIVEIRA JUNIOR, R. S. de; MACHADO, J. L.; CONSTANTIN, J. Alteracoes nas propriedades fisicas e quimicas de um latossolo vermelho distrofico por diferentes manejos na entrelinha da cultura da pupunha (Bactris gasipaes Kunth). Acta Scientiarum: Agronomy, Maringa, v. 27, n. 4, p. 753-759, oct./dec., 2005.| Biblioteca(s): Epagri-Sede. |
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Registro Completo |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
04/04/2011 |
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Data da última atualização: |
04/04/2011 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
-- - -- |
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Autoria: |
GUIMARÃES, R. M. L.; TORMENA, C. A.; ALVES, S. J.; BLAINSKI, E. |
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Afiliação: |
Epagri |
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Título: |
Tensile strength friability and organic carbon in an Oxisol under crop-livestock system. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Scientia Agricola, Piracicaba, SP, v. 66, n. 4, p. 499-505, 2009. |
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Idioma: |
Inglês |
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Notas: |
ISSN, 01039016 |
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Conteúdo: |
The crop-livestock system can promote soil compaction in surface layers, mainly due to
animal trampling. However, plants and their root growth, in interaction with animal trampling, can decrease the deleterious changes in soil structure caused by this system. Up to the present time, the physical soil modifications in crop-livestock systems, including oat and ryegrass crops for winter animal forages are unknown. The objective of this study was to quantify and to relate tensile strength, friability and soil organic carbon in an Oxisol under a crop-livestock system. The study was conducted in Campo Mourão - Paraná, Brazil. Four forage heights were used for the winter forages: 7, 14, 21 and 28 cm. For each forage height, five soil blocks were randomly collected from each layer of 0 - 0.1, 0.1 - 0.2 and 0.2 - 0.3 m of depth. The increase in carbon content promotes an increase in soil tensile strength at the 0.1 - 0.2 m soil depth, this layer having the highest values for tensile strength. The forage height of 21 cm was found to be the best height for soil friability, and the soil was very friable at this height. Despite a decrease in friability in the upper layers of the soil, the crop-livestock system was not found to be a limiting factor for the subsequent cultivation of annual crops.
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Categoria do assunto: |
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Marc: |
LEADER 01682naa a2200121 a 4500
001 1075357
005 2011-04-04
008 2009 bl uuuu u00u1 u #d
245 $aTensile strength friability and organic carbon in an Oxisol under crop-livestock system.
260 $c2009
500 $aISSN, 01039016
520 $aThe crop-livestock system can promote soil compaction in surface layers, mainly due to animal trampling. However, plants and their root growth, in interaction with animal trampling, can decrease the deleterious changes in soil structure caused by this system. Up to the present time, the physical soil modifications in crop-livestock systems, including oat and ryegrass crops for winter animal forages are unknown. The objective of this study was to quantify and to relate tensile strength, friability and soil organic carbon in an Oxisol under a crop-livestock system. The study was conducted in Campo Mourão - Paraná, Brazil. Four forage heights were used for the winter forages: 7, 14, 21 and 28 cm. For each forage height, five soil blocks were randomly collected from each layer of 0 - 0.1, 0.1 - 0.2 and 0.2 - 0.3 m of depth. The increase in carbon content promotes an increase in soil tensile strength at the 0.1 - 0.2 m soil depth, this layer having the highest values for tensile strength. The forage height of 21 cm was found to be the best height for soil friability, and the soil was very friable at this height. Despite a decrease in friability in the upper layers of the soil, the crop-livestock system was not found to be a limiting factor for the subsequent cultivation of annual crops.
773 $tScientia Agricola, Piracicaba, SP$gv. 66, n. 4, p. 499-505, 2009.
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