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Registro Completo |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
19/07/2002 |
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Data da última atualização: |
23/05/2005 |
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Autoria: |
RITCHEY, K. D.; CERDAUSKAS, R. F.; SILVA, J. E. da; VILELA, L. |
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Afiliação: |
CPAC. |
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Título: |
Residual Effects of Potassium and Magnesium on Soybean Yield and on Disease Incidence in a Cerrado Dark-Red Latosol. |
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Ano de publicação: |
1987 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, v.22, n.8, p.825-832, ago. 1987. |
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Idioma: |
Inglês |
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Conteúdo: |
Soybean cultivar Paraná was grown in 1981-81 at EMBRAPA/CPAC, at Planaltina, Brazil, to determine the residual effects of leveis of K and Mg applied in 1975, upon the yield and seed quality and the severity of diseases caused by Phomopsis spp. and Colletotrichum truncatum on soybean stems. Decreasing yields and seed quality were associated with decreasing soil K and/or Mg levels. Foliar K levels; were directly related. to soil K levels while foliar Mg levels were inversely related to soil K. Foliar K content of 1.3% was sufficient for maximum seed production. Annual return of crop residue increased soil K and Mg, fofiar K and Mg, and cation exchange capacity but not soil organic matter. There was no difference among K treatments in arnount of fruiting structures of C. truncatum and Phomopsis spp. on soybean stems.
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Palavras-Chave: |
Cofietotrichum truncatum; critical foliar At level; critical foliar K; crop residue; GIycine max. |
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Thesagro: |
Phomopsis. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01537naa a2200229 a 4500
001 1107562
005 2005-05-23
008 1987 bl uuuu u00u1 u #d
100 1 $aRITCHEY, K. D.
245 $aResidual Effects of Potassium and Magnesium on Soybean Yield and on Disease Incidence in a Cerrado Dark-Red Latosol.
260 $c1987
520 $aSoybean cultivar Paraná was grown in 1981-81 at EMBRAPA/CPAC, at Planaltina, Brazil, to determine the residual effects of leveis of K and Mg applied in 1975, upon the yield and seed quality and the severity of diseases caused by Phomopsis spp. and Colletotrichum truncatum on soybean stems. Decreasing yields and seed quality were associated with decreasing soil K and/or Mg levels. Foliar K levels; were directly related. to soil K levels while foliar Mg levels were inversely related to soil K. Foliar K content of 1.3% was sufficient for maximum seed production. Annual return of crop residue increased soil K and Mg, fofiar K and Mg, and cation exchange capacity but not soil organic matter. There was no difference among K treatments in arnount of fruiting structures of C. truncatum and Phomopsis spp. on soybean stems.
650 $aPhomopsis
653 $aCofietotrichum truncatum
653 $acritical foliar At level
653 $acritical foliar K
653 $acrop residue
653 $aGIycine max
700 1 $aCERDAUSKAS, R. F.
700 1 $aSILVA, J. E. da
700 1 $aVILELA, L.
773 $tPesquisa Agropecuária Brasileira, Brasília$gv.22, n.8, p.825-832, ago. 1987.
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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