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Registro Completo |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
26/02/2019 |
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Data da última atualização: |
26/02/2019 |
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Autoria: |
MILLER, S. F.; BAUWIN, G. R.; GUAZZELLI, R. J. |
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Afiliação: |
STANLEY F. MILLER, Instituto de Pesquisa IRI; GEORGE R. BAUWIN, Instituto de Pesquisa IRI; RICARDO J. GUAZZELLI, Instituto de Pesquisas e Experimentação Agropecuárias do Centro-Oeste - IPEACO/Estação Experimental de Uberaba. |
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Título: |
Avaliação econômica e agronômica de um experimento com feijão comum Uberaba, Minas Gerais. |
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Ano de publicação: |
1972 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Rio de Janeiro, v. 7, p. 19-26, 1972. |
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Série: |
(Agronomia, 5). |
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Idioma: |
Português |
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Notas: |
Título em inglês: Economic and agronomic evaluation of a common bean experimental Uberaba, Minas Gerais. |
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Conteúdo: |
Com a finalidade de estudar as possibilidades de aproveitamento dos cerrados da regiao para o cultivo de Phaseolus vulgaris, foi analisada a influencia, na producao, de cinco niveis de N e P2O5, utilizando-se um fatorial 5 x 5 completo. A partir desse esquema experimental comparou-se a eficiencia de quatro outros delineamentos. Um esquema central composto mais os extremos teve eficiencia equivalente ao fatorial 5 x 5 completo e foi utilizado na interpretacao economica. Determinou-se a superficie da resposta dos insumos e producao e as combinacoes de nutrientes que resultaram nos lucros maximos. Finalmente, foram feitas consideracoes sobre procedimentos alternativos no uso dos insumos em face de variacoes dos precos do produto dos insumos. O retorno por hectaredepois de deduzidos os custos de N e P2O5 aplicados, varia com o preco de feijao por quilograma, as quantidades otimas de insumos e retornos residuais caem quando os fatores de precos crescem. No entanto, ocorre uma percentagem maior de decrescimo nos retornos residuais por hectare e no rendimento por hectare quando aumenta o preco de P2O5 (com o preco de N mantido constante). A antecipacao apropriada do preco minimo e importante para o fazendeiro obter os retornos maximos. Ele entao usara as combinacoes de insumos mais lucrativos. |
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Palavras-Chave: |
Avaliacao; Brasil; Minas Gerais; Uberaba. |
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Thesagro: |
Cerrado; Feijão; Phaseolus Vulgaris. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/193375/1/Avaliacao-economica-e-agronomica-de-um-experimento-com-feijao.pdf
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Marc: |
LEADER 02101naa a2200253 a 4500
001 2106491
005 2019-02-26
008 1972 bl uuuu u00u1 u #d
100 1 $aMILLER, S. F.
245 $aAvaliação econômica e agronômica de um experimento com feijão comum Uberaba, Minas Gerais.
260 $c1972
490 $a(Agronomia, 5).
500 $aTítulo em inglês: Economic and agronomic evaluation of a common bean experimental Uberaba, Minas Gerais.
520 $aCom a finalidade de estudar as possibilidades de aproveitamento dos cerrados da regiao para o cultivo de Phaseolus vulgaris, foi analisada a influencia, na producao, de cinco niveis de N e P2O5, utilizando-se um fatorial 5 x 5 completo. A partir desse esquema experimental comparou-se a eficiencia de quatro outros delineamentos. Um esquema central composto mais os extremos teve eficiencia equivalente ao fatorial 5 x 5 completo e foi utilizado na interpretacao economica. Determinou-se a superficie da resposta dos insumos e producao e as combinacoes de nutrientes que resultaram nos lucros maximos. Finalmente, foram feitas consideracoes sobre procedimentos alternativos no uso dos insumos em face de variacoes dos precos do produto dos insumos. O retorno por hectaredepois de deduzidos os custos de N e P2O5 aplicados, varia com o preco de feijao por quilograma, as quantidades otimas de insumos e retornos residuais caem quando os fatores de precos crescem. No entanto, ocorre uma percentagem maior de decrescimo nos retornos residuais por hectare e no rendimento por hectare quando aumenta o preco de P2O5 (com o preco de N mantido constante). A antecipacao apropriada do preco minimo e importante para o fazendeiro obter os retornos maximos. Ele entao usara as combinacoes de insumos mais lucrativos.
650 $aCerrado
650 $aFeijão
650 $aPhaseolus Vulgaris
653 $aAvaliacao
653 $aBrasil
653 $aMinas Gerais
653 $aUberaba
700 1 $aBAUWIN, G. R.
700 1 $aGUAZZELLI, R. J.
773 $tPesquisa Agropecuária Brasileira, Rio de Janeiro$gv. 7, p. 19-26, 1972.
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
01/10/2008 |
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Data da última atualização: |
24/05/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
MOTA, F. F. da; GOMES, E. A.; MARRIEL, I. E.; PAIVA, E. |
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Afiliação: |
Fábio faria da Mota, UFRJ; ELIANE APARECIDA GOMES, CNPMS; IVANILDO EVODIO MARRIEL, CNPMS; Edilson Paiva, CNPMS. |
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Título: |
Bacterial and fungal communities in bulk soil and rhizospheres of aluminum-tolerant and aluminum-sensitive maize (Zea mays L.) lines cultivated in unlimed and limed cerrado soil. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Journal of Microbiology and Biotechnology, v. 18, n. 5, p. 805-814, 2008. |
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Idioma: |
Inglês |
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Conteúdo: |
Liming of acidic soils can prevent aluminum toxicity and improve crop production. Some maize lines show aluminum (AI) tolerance, and exudation of organic acids by roots has been considered to represent ao important mechanism involved in the tolerance. However, there is no information about the impact of liming on the structures of bacterial and fungal communities in Cerrado soil, nor if there are differences between the microbial communities from the rhizospheres of AI-tolerant and AI-sensitive maize lines. This study evaluated the effects of liming on the structure of bacterial and fungal communities in bulk soil and rhizospheres of AI-sensitive and AI-tolerant maize (Zea mays L.) lines cultivated in Cerrado soil by PCR-DGGE, 30 and 90 days after sowing. Bacterial fingerprints revealed that the bacterial communities from rhizospheres were more affected by aluminum stress in soil than by the maize line (AI-sensitive or AI-tolerant). Differences in bacterial communities were also observed over time (30 and 90 days after sowing), and these occurred mainly in the Actinobacteria. Conversely, fungal communities from the rhizosphere were weakly affected either by liming or by the rhizosphere, as observed from the DGGE profiles. Furthermore, only a few differences were observed in the DGGE profiles of the fungal populations during plant development when compared with bacterial communities. Cloning and sequencing of 16S rRNA gene fragments obtained from dominant DGGE bands detected in the bacterial profiles of to be Cerrado bulk soil revealed that Actinomycetales and Rhizobiales were among the dominant ribotypes. MenosLiming of acidic soils can prevent aluminum toxicity and improve crop production. Some maize lines show aluminum (AI) tolerance, and exudation of organic acids by roots has been considered to represent ao important mechanism involved in the tolerance. However, there is no information about the impact of liming on the structures of bacterial and fungal communities in Cerrado soil, nor if there are differences between the microbial communities from the rhizospheres of AI-tolerant and AI-sensitive maize lines. This study evaluated the effects of liming on the structure of bacterial and fungal communities in bulk soil and rhizospheres of AI-sensitive and AI-tolerant maize (Zea mays L.) lines cultivated in Cerrado soil by PCR-DGGE, 30 and 90 days after sowing. Bacterial fingerprints revealed that the bacterial communities from rhizospheres were more affected by aluminum stress in soil than by the maize line (AI-sensitive or AI-tolerant). Differences in bacterial communities were also observed over time (30 and 90 days after sowing), and these occurred mainly in the Actinobacteria. Conversely, fungal communities from the rhizosphere were weakly affected either by liming or by the rhizosphere, as observed from the DGGE profiles. Furthermore, only a few differences were observed in the DGGE profiles of the fungal populations during plant development when compared with bacterial communities. Cloning and sequencing of 16S rRNA gene fragments obtained from dominant DGGE bands detected ... Mostrar Tudo |
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Palavras-Chave: |
Bacterial and fungal communities; Maize; PCR-DGGE; Rhizospheres. |
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Thesagro: |
Cerrado. |
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Thesaurus NAL: |
liming; soil. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02410naa a2200241 a 4500
001 1491265
005 2018-05-24
008 2008 bl uuuu u00u1 u #d
100 1 $aMOTA, F. F. da
245 $aBacterial and fungal communities in bulk soil and rhizospheres of aluminum-tolerant and aluminum-sensitive maize (Zea mays L.) lines cultivated in unlimed and limed cerrado soil.$h[electronic resource]
260 $c2008
520 $aLiming of acidic soils can prevent aluminum toxicity and improve crop production. Some maize lines show aluminum (AI) tolerance, and exudation of organic acids by roots has been considered to represent ao important mechanism involved in the tolerance. However, there is no information about the impact of liming on the structures of bacterial and fungal communities in Cerrado soil, nor if there are differences between the microbial communities from the rhizospheres of AI-tolerant and AI-sensitive maize lines. This study evaluated the effects of liming on the structure of bacterial and fungal communities in bulk soil and rhizospheres of AI-sensitive and AI-tolerant maize (Zea mays L.) lines cultivated in Cerrado soil by PCR-DGGE, 30 and 90 days after sowing. Bacterial fingerprints revealed that the bacterial communities from rhizospheres were more affected by aluminum stress in soil than by the maize line (AI-sensitive or AI-tolerant). Differences in bacterial communities were also observed over time (30 and 90 days after sowing), and these occurred mainly in the Actinobacteria. Conversely, fungal communities from the rhizosphere were weakly affected either by liming or by the rhizosphere, as observed from the DGGE profiles. Furthermore, only a few differences were observed in the DGGE profiles of the fungal populations during plant development when compared with bacterial communities. Cloning and sequencing of 16S rRNA gene fragments obtained from dominant DGGE bands detected in the bacterial profiles of to be Cerrado bulk soil revealed that Actinomycetales and Rhizobiales were among the dominant ribotypes.
650 $aliming
650 $asoil
650 $aCerrado
653 $aBacterial and fungal communities
653 $aMaize
653 $aPCR-DGGE
653 $aRhizospheres
700 1 $aGOMES, E. A.
700 1 $aMARRIEL, I. E.
700 1 $aPAIVA, E.
773 $tJournal of Microbiology and Biotechnology$gv. 18, n. 5, p. 805-814, 2008.
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