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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
25/02/2021 |
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Data da última atualização: |
25/02/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
OLIVEIRA, L. E. Z.; NUNES, R. de S.; SOUSA, D. M. G. de; FIGUEIREDO, C. C. |
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Afiliação: |
RAFAEL DE SOUZA NUNES, CPAC; DJALMA MARTINHAO GOMES DE SOUSA, CPAC; Cícero Célio de Figueiredo. |
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Título: |
Dynamics of residual phosphorus forms under different tillage systems in a Brazilian Oxisol. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Geoderma, v. 367, 2020. |
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Idioma: |
Inglês |
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Conteúdo: |
Phosphorus (P) accumulation in soil, mainly from decades of agricultural use with frequent additions of phosphate fertilizers, results in a large reserve of this nutrient that can be exploited by farmers. However, the dynamics of soil P forms under the residual effect of phosphate fertilization is still little known. In an experiment located at Embrapa Cerrados, in Planaltina, DF, Brazil, corn or soybeans were grown during the summer for 17 years, receiving 35 kg of P ha−1 year−1. The same area was then cultivated with corn for 4 more years without the supply of this nutrient, in order to characterize the behavior of P fractions accumulated in the soil and identify those that contribute most to crop nutrition when phosphate fertilization is interrupted. Changes in total P (Pt), organic P (Po), inorganic P (Pi), and labile P extracted by the Bray-1, Mehlich-1 and Olsen methods (organic and inorganic) and organic carbon (C) were evaluated by means of samples obtained before and after cultivation without P fertilization in different soil layers subject to no-till (NT) or conventional tillage (CT), previously fertilized with reactive rock phosphate (RRP) or triple superphosphate (TSP) which were applied by broadcast spreading or band-applied to the planting row. The superficial layers were most responsible for crop nutrition in NT, especially in the mode of broadcast application, while in CT the relative contribution of each layer was less stratified. There was a drastic reduction in the stock of almost all P fractions, except for Po which showed an increase, notably in soil cultivated under CT (22% in the 0?10 cm layer), although the C content was reduced. This suggests that the little available inorganic fractions, partially replacing the labile fractions, were responsible for the supply of P to crops. This replacement was more effective in NT, since it could sustain greater P offtake by crops, despite the similar reductions in labile P fractions observed in both systems MenosPhosphorus (P) accumulation in soil, mainly from decades of agricultural use with frequent additions of phosphate fertilizers, results in a large reserve of this nutrient that can be exploited by farmers. However, the dynamics of soil P forms under the residual effect of phosphate fertilization is still little known. In an experiment located at Embrapa Cerrados, in Planaltina, DF, Brazil, corn or soybeans were grown during the summer for 17 years, receiving 35 kg of P ha−1 year−1. The same area was then cultivated with corn for 4 more years without the supply of this nutrient, in order to characterize the behavior of P fractions accumulated in the soil and identify those that contribute most to crop nutrition when phosphate fertilization is interrupted. Changes in total P (Pt), organic P (Po), inorganic P (Pi), and labile P extracted by the Bray-1, Mehlich-1 and Olsen methods (organic and inorganic) and organic carbon (C) were evaluated by means of samples obtained before and after cultivation without P fertilization in different soil layers subject to no-till (NT) or conventional tillage (CT), previously fertilized with reactive rock phosphate (RRP) or triple superphosphate (TSP) which were applied by broadcast spreading or band-applied to the planting row. The superficial layers were most responsible for crop nutrition in NT, especially in the mode of broadcast application, while in CT the relative contribution of each layer was less stratified. There was a dra... Mostrar Tudo |
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Thesagro: |
Adubação; Fósforo; Plantio Direto. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02566naa a2200193 a 4500
001 2130290
005 2021-02-25
008 2020 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, L. E. Z.
245 $aDynamics of residual phosphorus forms under different tillage systems in a Brazilian Oxisol.$h[electronic resource]
260 $c2020
520 $aPhosphorus (P) accumulation in soil, mainly from decades of agricultural use with frequent additions of phosphate fertilizers, results in a large reserve of this nutrient that can be exploited by farmers. However, the dynamics of soil P forms under the residual effect of phosphate fertilization is still little known. In an experiment located at Embrapa Cerrados, in Planaltina, DF, Brazil, corn or soybeans were grown during the summer for 17 years, receiving 35 kg of P ha−1 year−1. The same area was then cultivated with corn for 4 more years without the supply of this nutrient, in order to characterize the behavior of P fractions accumulated in the soil and identify those that contribute most to crop nutrition when phosphate fertilization is interrupted. Changes in total P (Pt), organic P (Po), inorganic P (Pi), and labile P extracted by the Bray-1, Mehlich-1 and Olsen methods (organic and inorganic) and organic carbon (C) were evaluated by means of samples obtained before and after cultivation without P fertilization in different soil layers subject to no-till (NT) or conventional tillage (CT), previously fertilized with reactive rock phosphate (RRP) or triple superphosphate (TSP) which were applied by broadcast spreading or band-applied to the planting row. The superficial layers were most responsible for crop nutrition in NT, especially in the mode of broadcast application, while in CT the relative contribution of each layer was less stratified. There was a drastic reduction in the stock of almost all P fractions, except for Po which showed an increase, notably in soil cultivated under CT (22% in the 0?10 cm layer), although the C content was reduced. This suggests that the little available inorganic fractions, partially replacing the labile fractions, were responsible for the supply of P to crops. This replacement was more effective in NT, since it could sustain greater P offtake by crops, despite the similar reductions in labile P fractions observed in both systems
650 $aAdubação
650 $aFósforo
650 $aPlantio Direto
700 1 $aNUNES, R. de S.
700 1 $aSOUSA, D. M. G. de
700 1 $aFIGUEIREDO, C. C.
773 $tGeoderma$gv. 367, 2020.
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Embrapa Cerrados (CPAC) |
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Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
23/01/2018 |
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Data da última atualização: |
23/01/2018 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
KLAIC, R.; GUIMARÃES, G. G. F.; FRANCECHINELLI, M.; ZANGIROLAMI, T. C.; OLIVEIRA, C. R. de; FARINAS, C. S. |
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Afiliação: |
CAUE RIBEIRO DE OLIVEIRA, CNPDIA; CRISTIANE SANCHEZ FARINAS, CNPDIA. |
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Título: |
Bioativação de óxidos metálicos: Uma estratégia para aumentar a solubilidade de óxidos como fonte de micronutrientes. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
In: WORKSHOP BRASILEIRO DE FERTILIZANTE, 5, 2017, Uberaba, MG. Livro de Resumos, Uberaba, 2017. |
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Idioma: |
Português |
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Palavras-Chave: |
Ácidos orgânicos; Micronutrientes. |
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Thesagro: |
Aspergillus Niger; Solubilização. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00728nam a2200205 a 4500
001 2086076
005 2018-01-23
008 2017 bl uuuu u00u1 u #d
100 1 $aKLAIC, R.
245 $aBioativação de óxidos metálicos$bUma estratégia para aumentar a solubilidade de óxidos como fonte de micronutrientes.$h[electronic resource]
260 $aIn: WORKSHOP BRASILEIRO DE FERTILIZANTE, 5, 2017, Uberaba, MG. Livro de Resumos, Uberaba$c2017
650 $aAspergillus Niger
650 $aSolubilização
653 $aÁcidos orgânicos
653 $aMicronutrientes
700 1 $aGUIMARÃES, G. G. F.
700 1 $aFRANCECHINELLI, M.
700 1 $aZANGIROLAMI, T. C.
700 1 $aOLIVEIRA, C. R. de
700 1 $aFARINAS, C. S.
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