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Registro Completo |
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Biblioteca(s): |
Embrapa Agropecuária Oeste. |
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Data corrente: |
09/07/1996 |
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Data da última atualização: |
09/07/1996 |
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Autoria: |
RANGEL, P. H. N. |
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Título: |
Selecao recorrente e hibridos: alternativas para aumentar o potencial produtivo das variedades de arroz. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
In: CONFERENCIA INTERNACIONAL DE ARROZ PARA A AMERICA LATINA E O CARIBE, 9., 1995, Goiania. Arroz na America Latina: perspectivas para o incremento da producao e do potencial produtivo. Goiania: EMBRAPA-CNPAF, 1995. |
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Páginas: |
p.37-48 |
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Série: |
(EMBRAPA-CNPAF. Documentos, 60). |
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Idioma: |
Português |
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Palavras-Chave: |
Grain; Hybrid; Selection; Yield. |
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Thesagro: |
Arroz; Genética; Grão; Hibrido; Melhoramento; Oryza Sativa; Rendimento; Seleção. |
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Thesaurus Nal: |
breeding; genetics; rice. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00971naa a2200313 a 4500
001 1239811
005 1996-07-09
008 1995 bl uuuu u00u1 u #d
100 1 $aRANGEL, P. H. N.
245 $aSelecao recorrente e hibridos$balternativas para aumentar o potencial produtivo das variedades de arroz.
260 $c1995
300 $ap.37-48
490 $a(EMBRAPA-CNPAF. Documentos, 60).
650 $abreeding
650 $agenetics
650 $arice
650 $aArroz
650 $aGenética
650 $aGrão
650 $aHibrido
650 $aMelhoramento
650 $aOryza Sativa
650 $aRendimento
650 $aSeleção
653 $aGrain
653 $aHybrid
653 $aSelection
653 $aYield
773 $tIn: CONFERENCIA INTERNACIONAL DE ARROZ PARA A AMERICA LATINA E O CARIBE, 9., 1995, Goiania. Arroz na America Latina: perspectivas para o incremento da producao e do potencial produtivo. Goiania: EMBRAPA-CNPAF, 1995.
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Registro original: |
Embrapa Agropecuária Oeste (CPAO) |
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Biblioteca |
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Registro |
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URL |
Voltar
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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. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
07/12/1998 |
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Data da última atualização: |
07/12/1998 |
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Autoria: |
RITCHEY, K. D.; SOUZA, D. M. G.; LOBATO, E.; CORREA, O. |
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Título: |
Calcium leaching to increase rooting depth in a Brazilian Savannah Oxisol. |
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Ano de publicação: |
1980 |
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Fonte/Imprenta: |
Agronomy Journal, Madison, v.72, p.40-44, 1980. |
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Idioma: |
Inglês |
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Conteúdo: |
Root growth in subsoils of Oxisols is often precluded because the roots of many are sensitive to soil acidity. This increases plant stress during dry periods when available soil water in the limed surface layers in exhausted. The low soil CEC and high rainfall in Central Brasil suggest that soluble calcium salts might leach below the plow layer and reduce soil acidity. To test this possibility, soil columns, simulating field profiles, were constructed in the laboratory and various Ca salts were mixed in the 0 to 15-cm layer. Addition of 1,200 mm water to 2,000 kg/ha Ca added as CaCl2 CaSO4, and CaCO3 caused Ca movement to 180, 75, and 25 cm, respectively. Calcium sulfate decreased Al saturation and increased soil pH at depth. Several field experiments were sampled to determine the effect of previous treatments on the movement of Ca + Mg. Three to four years after application of gypsum, in ordinary superphosphate, subsoil pH and Ca + Mg status were increased, and Al saturation decreased at depths as great as 75 to 90 cm. Zea mays L. roots growing in the improved subsoil environment were able to take up water and wisthstand droughts. |
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Palavras-Chave: |
Maize. |
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Thesagro: |
Calagem; Cálcio; Cerrado; Gesso; Milho; Oxisol; Solo; Zea Mays. |
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Thesaurus NAL: |
calcium; Ferralsols; gypsum; liming; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01906naa a2200325 a 4500
001 1544219
005 1998-12-07
008 1980 bl --- 0-- u #d
100 1 $aRITCHEY, K. D.
245 $aCalcium leaching to increase rooting depth in a Brazilian Savannah Oxisol.
260 $c1980
520 $aRoot growth in subsoils of Oxisols is often precluded because the roots of many are sensitive to soil acidity. This increases plant stress during dry periods when available soil water in the limed surface layers in exhausted. The low soil CEC and high rainfall in Central Brasil suggest that soluble calcium salts might leach below the plow layer and reduce soil acidity. To test this possibility, soil columns, simulating field profiles, were constructed in the laboratory and various Ca salts were mixed in the 0 to 15-cm layer. Addition of 1,200 mm water to 2,000 kg/ha Ca added as CaCl2 CaSO4, and CaCO3 caused Ca movement to 180, 75, and 25 cm, respectively. Calcium sulfate decreased Al saturation and increased soil pH at depth. Several field experiments were sampled to determine the effect of previous treatments on the movement of Ca + Mg. Three to four years after application of gypsum, in ordinary superphosphate, subsoil pH and Ca + Mg status were increased, and Al saturation decreased at depths as great as 75 to 90 cm. Zea mays L. roots growing in the improved subsoil environment were able to take up water and wisthstand droughts.
650 $acalcium
650 $aFerralsols
650 $agypsum
650 $aliming
650 $asoil
650 $aCalagem
650 $aCálcio
650 $aCerrado
650 $aGesso
650 $aMilho
650 $aOxisol
650 $aSolo
650 $aZea Mays
653 $aMaize
700 1 $aSOUZA, D. M. G.
700 1 $aLOBATO, E.
700 1 $aCORREA, O.
773 $tAgronomy Journal, Madison$gv.72, p.40-44, 1980.
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