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Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
20/08/2004 |
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Data da última atualização: |
30/06/2005 |
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Autoria: |
FRANCHINI, J. C.; PAVAN, M. A.; MIYAZAWA, M. |
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Título: |
Redistribution of phosphorus in soil through cover crop roots. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Brazilian Archives of Biology and Technology, Curitiba, vol.47, no.3, p.381-386, July 2004. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this study was to evaluate if cover crops can absorb P from the upper layers and transport it in their roots to subsoil layers. Samples of an Oxisol were placed in PVC columns. Super phosphate fertilizer was applied to the 0-10 cm soil surface layers. The cover crops tested were: Avena strigosa, Avena sativa, Secale cereale, Pisum sativum subsp arvense, Pisum sativum, Vicia villosa, Vicia sativa, Lupinus angustifoliu, Lupinus albus, and Triticum aestivum. After a growth period of 80 days the cover crop shoots were cut off and the soil was divided into 10cm layers and the roots of each layer were washed out. The roots and shoots were analyzed separated for total P contribution to the soil. Considerable amount of P was present in the roots of cover crops. Vicia sativa contained more than 60% of total plant P in the roots. The contribution of Vicia sativa to soil P bellow the fertilized zone was about 7 kg ha-1. It thus appeared that there existed a possibility of P redistribution into the soil under no tillage by using cover crops in rotation with cash crops. Vicia sativa was the most efficient cover crop species as P carrier into the roots from superficial layer to lower layers. |
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Thesagro: |
Adubação Verde; Fósforo; Plantio Direto; Solo. |
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Categoria do assunto: |
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Marc: |
LEADER 01761naa a2200193 a 4500
001 1467281
005 2005-06-30
008 2004 bl --- 0-- u #d
100 1 $aFRANCHINI, J. C.
245 $aRedistribution of phosphorus in soil through cover crop roots.
260 $c2004
520 $aThe objective of this study was to evaluate if cover crops can absorb P from the upper layers and transport it in their roots to subsoil layers. Samples of an Oxisol were placed in PVC columns. Super phosphate fertilizer was applied to the 0-10 cm soil surface layers. The cover crops tested were: Avena strigosa, Avena sativa, Secale cereale, Pisum sativum subsp arvense, Pisum sativum, Vicia villosa, Vicia sativa, Lupinus angustifoliu, Lupinus albus, and Triticum aestivum. After a growth period of 80 days the cover crop shoots were cut off and the soil was divided into 10cm layers and the roots of each layer were washed out. The roots and shoots were analyzed separated for total P contribution to the soil. Considerable amount of P was present in the roots of cover crops. Vicia sativa contained more than 60% of total plant P in the roots. The contribution of Vicia sativa to soil P bellow the fertilized zone was about 7 kg ha-1. It thus appeared that there existed a possibility of P redistribution into the soil under no tillage by using cover crops in rotation with cash crops. Vicia sativa was the most efficient cover crop species as P carrier into the roots from superficial layer to lower layers.
650 $aAdubação Verde
650 $aFósforo
650 $aPlantio Direto
650 $aSolo
700 1 $aPAVAN, M. A.
700 1 $aMIYAZAWA, M.
773 $tBrazilian Archives of Biology and Technology, Curitiba, vol.47, no.3, p.381-386, July 2004.
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