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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Ocidental. Para informações adicionais entre em contato com cpaa.biblioteca@embrapa.br. |
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
07/02/2020 |
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Data da última atualização: |
21/03/2025 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SMYTH, T. J.; CRAVO, M. da S. |
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Afiliação: |
T. J. SMYTH; MANOEL DA SILVA CRAVO, UEPAE DE MANAUS. |
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Título: |
Phosphorus management for continuous corn-cowpea production in a Brazilian Amazon Oxisol. |
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Ano de publicação: |
1990 |
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Fonte/Imprenta: |
Agronomy Journal, v. 82, p. 305-309, 1990. |
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Idioma: |
Inglês |
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Conteúdo: |
Although Oxisols occupy extensive areas in the Amazon, few studies have addressed their fertilizer P requirements for sustained, long-term crop production. This field study was conducted to evaluate initial and long-term responses to P rates and placement by corn (Zea mays L.) and cowpea (Vigna Unguiculata L.) when grown in annual rotation during five consecutive years in a Xanthic Hapludox (clayey, kaolinitic, isohyperthermic) near Manaus, Brazil. Effects on yields of sole broadcast P rates of 0, 22, 44, 88 and 176 kg ha in split-plot combination with subplot banded P rates of 0, 11, 22 and 44 kg ha were evaluated over 11 total crops. Banded P at 11 kg ha was applied to every crop and rates of 22 and 44 kg P ha were only applied to the initial eight and four crops, respectively. Residual effect of broadcast P, as measured by both yields and Mehlich 1 soil P, were greater at high rates. Although cowpea yields were increased up to the highest band rate, no response in corn yields were observed beyond the rate of 22 kg P ha. At equal amounts of applied P, banded P provided greater yields than broadcast P during the initial crops. Total corn and/or cowpea yields, after 11 crops, were similar for all broadcast and band combinations at equal amounts of total applied P. The absence of a cumulative yield difference among placement methods indicated that banded placement of 22 and 44 kg P ha-' to corn and cowpea, respectively, would be the best method of applying P to sustain long-term crop production under the manual tillage practices used in the region. MenosAlthough Oxisols occupy extensive areas in the Amazon, few studies have addressed their fertilizer P requirements for sustained, long-term crop production. This field study was conducted to evaluate initial and long-term responses to P rates and placement by corn (Zea mays L.) and cowpea (Vigna Unguiculata L.) when grown in annual rotation during five consecutive years in a Xanthic Hapludox (clayey, kaolinitic, isohyperthermic) near Manaus, Brazil. Effects on yields of sole broadcast P rates of 0, 22, 44, 88 and 176 kg ha in split-plot combination with subplot banded P rates of 0, 11, 22 and 44 kg ha were evaluated over 11 total crops. Banded P at 11 kg ha was applied to every crop and rates of 22 and 44 kg P ha were only applied to the initial eight and four crops, respectively. Residual effect of broadcast P, as measured by both yields and Mehlich 1 soil P, were greater at high rates. Although cowpea yields were increased up to the highest band rate, no response in corn yields were observed beyond the rate of 22 kg P ha. At equal amounts of applied P, banded P provided greater yields than broadcast P during the initial crops. Total corn and/or cowpea yields, after 11 crops, were similar for all broadcast and band combinations at equal amounts of total applied P. The absence of a cumulative yield difference among placement methods indicated that banded placement of 22 and 44 kg P ha-' to corn and cowpea, respectively, would be the best method of applying P to sustain long-t... Mostrar Tudo |
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Thesagro: |
Deficiência Nutricional. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02023naa a2200145 a 4500
001 2120006
005 2025-03-21
008 1990 bl uuuu u00u1 u #d
100 1 $aSMYTH, T. J.
245 $aPhosphorus management for continuous corn-cowpea production in a Brazilian Amazon Oxisol.$h[electronic resource]
260 $c1990
520 $aAlthough Oxisols occupy extensive areas in the Amazon, few studies have addressed their fertilizer P requirements for sustained, long-term crop production. This field study was conducted to evaluate initial and long-term responses to P rates and placement by corn (Zea mays L.) and cowpea (Vigna Unguiculata L.) when grown in annual rotation during five consecutive years in a Xanthic Hapludox (clayey, kaolinitic, isohyperthermic) near Manaus, Brazil. Effects on yields of sole broadcast P rates of 0, 22, 44, 88 and 176 kg ha in split-plot combination with subplot banded P rates of 0, 11, 22 and 44 kg ha were evaluated over 11 total crops. Banded P at 11 kg ha was applied to every crop and rates of 22 and 44 kg P ha were only applied to the initial eight and four crops, respectively. Residual effect of broadcast P, as measured by both yields and Mehlich 1 soil P, were greater at high rates. Although cowpea yields were increased up to the highest band rate, no response in corn yields were observed beyond the rate of 22 kg P ha. At equal amounts of applied P, banded P provided greater yields than broadcast P during the initial crops. Total corn and/or cowpea yields, after 11 crops, were similar for all broadcast and band combinations at equal amounts of total applied P. The absence of a cumulative yield difference among placement methods indicated that banded placement of 22 and 44 kg P ha-' to corn and cowpea, respectively, would be the best method of applying P to sustain long-term crop production under the manual tillage practices used in the region.
650 $aDeficiência Nutricional
700 1 $aCRAVO, M. da S.
773 $tAgronomy Journal$gv. 82, p. 305-309, 1990.
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| Registros recuperados : 6 | |
| 2. |  | MENDONCA, F. C.; VINHOLIS, M. de M. B.; SIMÕES, M. A. R. e; REZENDE, M. de; COLOMBO JÚNIOR, C. N. Avaliação dos impactos econômico, social e ambiental de ações de pesquisa e transferência de tecnologia de irrigação de pastagens. In: CONGRESSO DA SOCIEDADE BRASILEIRA DE ECONOMIA ADMINISTRAÇÃO E SOCIOLOGIA RURAL, 47., 2009, Porto Alegre. Desenvolvimento rural e sistemas agroalimentares os agromegócios no contexto de integração das nações: anais. Porto Alegre: Sober, 2009. 1 CD-ROM| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 3. | | SIMÕES, M. A. R. e.; VINHOLIS, M. de M. B.; SOUZA, G. B. de; NOGUEIRA, A. R. de A.; Del SANTO, V. R. Avaliação dos impactos econômico, social e ambiental de um programa de Ensaio de Proficiência para Laboratórios. In: CONGRESSO DA SOCIEDADE BRASILEIRA DE ECONOMIA ADMINISTRAÇÃO E SOCIOLOGIA RURAL, 47., 2009, Porto Alegre. Desenvolvimento rural e sistemas agroalimentares os agromegócios no contexto de integração das nações: anais. Porto Alegre: Sober, 2009.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 4. | | VINHOLIS, M. de M. B.; MENDONÇA, F. C.; SIMÕES, M. A. R. E.; BARATTA, V. F. C.; CAGNIN FILHO, F. A. Avaliação dos impactos econômico, social e ambiental do uso da alfafa em sistemas de produção de leite. In: CONGRESSO DA SOCIEDADE BRASILEIRA DE ECONOMIA ADMINISTRAÇÃO E SOCIOLOGIA RURAL, 47., 2009, Porto Alegre. Desenvolvimento rural e sistemas agroalimentares os agromegócios no contexto de integração das nações: anais. Porto Alegre: Sober, 2009. 1 CD-ROM| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
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| 5. | | VILAMIU, R. G. d´A.; TERNES, S.; BARBOSA, F. F. L.; SIMOES, M. A. R. e; SANTOS, T. T. de C. Modelling citrus Huanglongbing spread as affected by alternative hosts, vector populations and roguing. In: SIMPÓSIO INTERNACIONAL DE FRUTICULTURA, 3., 2015, Salvador. Pragas quarentenárias e melhoramento preventivo: resumos. Brasília, DF: Embrapa, 2017. p. 79.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 6. | | VILAMIU, R. G. d´A.; TERNES, S.; BARBOSA, F. F. L.; SIMOES, M. A. R. e; SANTOS, T. T. de C. Modelling citrus Huanglongbing spread as affected by alternative hosts, vector populations and roguing. In: SIMPÓSIO INTERNACIONAL DE FRUTICULTURA, 3., 2015, Salvador. Pragas quarentenárias e melhoramento preventivo: resumos. Brasília, DF: Embrapa, 2017. p. 79. Na publicação: Francisco F. Laranjeira.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Agricultura Digital. |
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| Registros recuperados : 6 | |
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