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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
26/05/2022 |
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Data da última atualização: |
26/05/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
OLIVEIRA, L. E. Z. de; NUNES, R. de S.; FIGUEIREDO, C. C. de; REIN, T. A. |
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Afiliação: |
LUIZ EDUARDO ZANCANARO DE OLIVEIRA; RAFAEL DE SOUZA NUNES, CPAC; CÍCERO CÉLIO DE FIGUEIREDO; THOMAZ ADOLPHO REIN, CPAC. |
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Título: |
Spatial distribution of soil phosphorus fractions in a clayey Oxisol submitted to long-term phosphate fertilization strategies. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Geoderma, v. 418, 115847, 2022. |
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Idioma: |
Inglês |
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Conteúdo: |
Due to the strong interaction of phosphorus (P) with soil constituents, P fertilizer placement can significantly affect how crops take up this nutrient. Nonetheless, few studies address the spatial distribution of P at the rowinterrow scale according to management strategies. In a 16-yr no-tillage (NT) field experiment involving two different P fertilizer application methods (broadcast or band application) and two P sources (triple superphosphate ? TSP or reactive Gafsa phosphate rock-RPR), plus a control treatment, the spatial distribution of P fractions was assessed in two occasions: after the 8th and the 16th crops. This was done vertically to a depth of 30 cm and horizontally from the crop row to the center of the interrows. Broadcast treatments showed total and Mehlich-1 P accumulation at the soil surface while for band application this accumulation was in the crop row region. A small P movement down the soil profile was observed from the 8th to the 16th crop with broadcast application, whereas with band fertilizer this effect was more noticeable, showing increased soil volume under P fertilizer influence even without soil tillage; it is likely that this was partly due to biological P turnover and application at depth. After 16 crops, the soil volume under the influence of P fertilizer was greater under band application while the volume above Mehlich-1 P critical levels for the 0?20 cm layer in regional studies was higher under broadcast application, independent of the P source. Soil organic carbon (SOC) contents were not affected by P placement or source. However, a significant accumulation of SOC was seen from the soil surface downwards after the last eight crops. The spatial distribution of P and SOC was better correlated under broadcast treatments, with high values for both variables at the soil surface; this may explain similar yields to those obtained with band application, where P fertilizer is placed near the main roots in an attempt to reduce P adsorption to the soil solid phase MenosDue to the strong interaction of phosphorus (P) with soil constituents, P fertilizer placement can significantly affect how crops take up this nutrient. Nonetheless, few studies address the spatial distribution of P at the rowinterrow scale according to management strategies. In a 16-yr no-tillage (NT) field experiment involving two different P fertilizer application methods (broadcast or band application) and two P sources (triple superphosphate ? TSP or reactive Gafsa phosphate rock-RPR), plus a control treatment, the spatial distribution of P fractions was assessed in two occasions: after the 8th and the 16th crops. This was done vertically to a depth of 30 cm and horizontally from the crop row to the center of the interrows. Broadcast treatments showed total and Mehlich-1 P accumulation at the soil surface while for band application this accumulation was in the crop row region. A small P movement down the soil profile was observed from the 8th to the 16th crop with broadcast application, whereas with band fertilizer this effect was more noticeable, showing increased soil volume under P fertilizer influence even without soil tillage; it is likely that this was partly due to biological P turnover and application at depth. After 16 crops, the soil volume under the influence of P fertilizer was greater under band application while the volume above Mehlich-1 P critical levels for the 0?20 cm layer in regional studies was higher under broadcast application, independent of the ... Mostrar Tudo |
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Thesagro: |
Fósforo; Plantio Direto; Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02614naa a2200193 a 4500
001 2143493
005 2022-05-26
008 2022 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, L. E. Z. de
245 $aSpatial distribution of soil phosphorus fractions in a clayey Oxisol submitted to long-term phosphate fertilization strategies.$h[electronic resource]
260 $c2022
520 $aDue to the strong interaction of phosphorus (P) with soil constituents, P fertilizer placement can significantly affect how crops take up this nutrient. Nonetheless, few studies address the spatial distribution of P at the rowinterrow scale according to management strategies. In a 16-yr no-tillage (NT) field experiment involving two different P fertilizer application methods (broadcast or band application) and two P sources (triple superphosphate ? TSP or reactive Gafsa phosphate rock-RPR), plus a control treatment, the spatial distribution of P fractions was assessed in two occasions: after the 8th and the 16th crops. This was done vertically to a depth of 30 cm and horizontally from the crop row to the center of the interrows. Broadcast treatments showed total and Mehlich-1 P accumulation at the soil surface while for band application this accumulation was in the crop row region. A small P movement down the soil profile was observed from the 8th to the 16th crop with broadcast application, whereas with band fertilizer this effect was more noticeable, showing increased soil volume under P fertilizer influence even without soil tillage; it is likely that this was partly due to biological P turnover and application at depth. After 16 crops, the soil volume under the influence of P fertilizer was greater under band application while the volume above Mehlich-1 P critical levels for the 0?20 cm layer in regional studies was higher under broadcast application, independent of the P source. Soil organic carbon (SOC) contents were not affected by P placement or source. However, a significant accumulation of SOC was seen from the soil surface downwards after the last eight crops. The spatial distribution of P and SOC was better correlated under broadcast treatments, with high values for both variables at the soil surface; this may explain similar yields to those obtained with band application, where P fertilizer is placed near the main roots in an attempt to reduce P adsorption to the soil solid phase
650 $aFósforo
650 $aPlantio Direto
650 $aSolo
700 1 $aNUNES, R. de S.
700 1 $aFIGUEIREDO, C. C. de
700 1 $aREIN, T. A.
773 $tGeoderma$gv. 418, 115847, 2022.
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Embrapa Cerrados (CPAC) |
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| Registros recuperados : 45 | |
| 5. |  | NUNES, A. P.; TOMAS, W. M. Aves migratórias ocorrentes no Pantanal In: TALLER RED CYTED/HUMEDALES (406 RT0285), 1.; 2007, Corumbá. efecto de los cambios globales sobre los humedales. Resúmenes... Corumbá: Embrapa Pantanal, 2007. (Embrapa Pantanal. Documentos, 90). 1 p.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
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| 17. | | NUNES, A. P.; DISCONZI, G.; LAPS, R. R.; TOMAS, W. M. Distribuição e conservação de aves limícolas migratórias no Pantanal. In: SIMPÓSIO SOBRE RECURSOS NATURAIS E SOCIOECONÔMICOS DO PANTANAL, 6.; EVENTO DE INICIAÇÃO CIENTÍFICA DO PANTANAL, 1., 2013, Corumbá, MS. Desafios e soluções para o Pantanal: resumos. Corumbá: Embrapa Pantanal, 2013. 6p.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pantanal. |
|  |
| 18. | | TOMAS, W. M.; CACERES, N. C.; NUNES, A. P.; FISCHER, E.; MOURAO, G.; CAMPOS, Z. Mammals in the Pantanal wetland, Brazil. In: JUNK, W. J.; SILVA, C. J. da.; NUNES DA CUNHA, C.; WANTZEN, K. M. (Ed.) The Pantanal: ecology, biodiversity and sustainable management of a large neotropical seasonal wetland. Sofia: Pensoft Publishers, 2011. p. 565-597.| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Pantanal. |
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| 20. | | BRICARELLO, P. A.; VAZ, C. M. S. L.; NUNES, A. P.; VAZ, C. S. L. Respostas hematológicas, bioquímicas, parasitológicas e histológicas de cordeiros da raça Crioula Lanada frente a infecção natural por Haemonchus contortus. In: SIMPÓSIO DE RECURSOS GENÉTICOS PARA AMÉRICA LATINA E CARIBE, 2., 1999, Brasília, DF. Recursos genéticos: segurança alimentar para o terceiro milênio: anais. Brasília, DF: Embrapa Recursos Genéticos e Biotecnologia, 1999. 1 CD-ROM. SIRGEALC.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sul. |
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| Registros recuperados : 45 | |
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