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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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Registro Completo |
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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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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
08/02/2008 |
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Data da última atualização: |
04/12/2013 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
RAMOS, A. R. P.; DIAS, R. de C. S.; ARAGÃO, C. A.; BATISTA, P. F.; PIRES, M. M. da L.; DANTAS, B. F. |
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Afiliação: |
Anamaria Ribeiro Pereira Ramos, UNEB; RITA DE CASSIA SOUZA DIAS, CPATSA; Carlos Alberto Aragão, UNEB; Patrício Ferreira Batista, UNEB; Mayara Milena da Luz Pires, UNEB; BARBARA FRANCA DANTAS, CPATSA. |
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Título: |
Avaliação de emergência e crescimento inicial de híbridos experimentais de melancia para o Submédio São Francisco. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Horticultura Brasileira, Brasilia, DF, v. 25, n. 1, p. s38, ago. 2007. |
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ISSN: |
0102-0536 |
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Idioma: |
Português |
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Notas: |
Suplemento, ref 197. Edição dos Resumos do 47. Congresso Brasileiro de Olericultura; 4. Simpósio Brasileiro sobre Cucurbitáceas, Porto Seguro, ago. 2007. |
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Conteúdo: |
O presente trabalho teve como objetivo, determinar o vigor em sementes híbridas de melancia através da avaliação de emergência e crescimento inicial das plântulas. Para tanto sementes de oito híbridos experimentais e dois híbridos comerciais (Smile e Sugar baby) foram postos para germinar em bandejas de isopor de 200 células preenchidas com substrato comercial plantmax em casa de vegetação coberta com tela sombrite a 50%, no Departamento de Tecnologia e Ciências Sociais - DTCS, Juazeiro-BA. O delineamento experimental utilizado foi o inteiramente casualizado. A germinação (emergência) foi determinada através da contagem de plântulas normais aos 21 dias após a semeadura. Para a determinação de crescimento de plântulas e diâmetro de colo, foram realizadas duas avaliações aos 15 e 21 dias após a semeadura. Verificou-se que o híbrido 02, apresentou superioridade para todas as variáveis avaliadas (97% de germinação; 4,58 e 6,10 cm de altura de plantas aos 15 e 21 dias e 0,20 e 0,23 cm de diâmetro de colo aos 15 e 21 dias após o transplantio), seguido dos híbridos 05 e a cv. Smile. |
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Palavras-Chave: |
Submédio São Francisco; Watermelon. |
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Thesagro: |
Citrullus Lanatus; Hibrido; Melancia. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPATSA/36838/1/OPB1683.pdf
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Marc: |
LEADER 02037nam a2200253 a 4500
001 1128917
005 2013-12-04
008 2007 bl uuuu u00u1 u #d
022 $a0102-0536
100 1 $aRAMOS, A. R. P.
245 $aAvaliação de emergência e crescimento inicial de híbridos experimentais de melancia para o Submédio São Francisco.
260 $aHorticultura Brasileira, Brasilia, DF, v. 25, n. 1, p. s38, ago. 2007.$c2007
500 $aSuplemento, ref 197. Edição dos Resumos do 47. Congresso Brasileiro de Olericultura; 4. Simpósio Brasileiro sobre Cucurbitáceas, Porto Seguro, ago. 2007.
520 $aO presente trabalho teve como objetivo, determinar o vigor em sementes híbridas de melancia através da avaliação de emergência e crescimento inicial das plântulas. Para tanto sementes de oito híbridos experimentais e dois híbridos comerciais (Smile e Sugar baby) foram postos para germinar em bandejas de isopor de 200 células preenchidas com substrato comercial plantmax em casa de vegetação coberta com tela sombrite a 50%, no Departamento de Tecnologia e Ciências Sociais - DTCS, Juazeiro-BA. O delineamento experimental utilizado foi o inteiramente casualizado. A germinação (emergência) foi determinada através da contagem de plântulas normais aos 21 dias após a semeadura. Para a determinação de crescimento de plântulas e diâmetro de colo, foram realizadas duas avaliações aos 15 e 21 dias após a semeadura. Verificou-se que o híbrido 02, apresentou superioridade para todas as variáveis avaliadas (97% de germinação; 4,58 e 6,10 cm de altura de plantas aos 15 e 21 dias e 0,20 e 0,23 cm de diâmetro de colo aos 15 e 21 dias após o transplantio), seguido dos híbridos 05 e a cv. Smile.
650 $aCitrullus Lanatus
650 $aHibrido
650 $aMelancia
653 $aSubmédio São Francisco
653 $aWatermelon
700 1 $aDIAS, R. de C. S.
700 1 $aARAGÃO, C. A.
700 1 $aBATISTA, P. F.
700 1 $aPIRES, M. M. da L.
700 1 $aDANTAS, B. F.
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