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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
14/07/1998 |
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Data da última atualização: |
01/06/2009 |
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Autoria: |
FRANCA NETO, J. de B. |
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Afiliação: |
EMBRAPA-CNPSo. Londrina, PR. |
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Título: |
Response of hardseeded soybeans to combine harvest and artificial drying. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
Mississippi State: Mississippi State University. 1978. |
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Páginas: |
123p. |
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Idioma: |
Inglês |
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Notas: |
M.Sc. Thesis. |
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Conteúdo: |
This study compared the effects of mechanical harvest and artificial drying on seed quality of soybeans having permeable (Dare) and impermeable (D-1) coats. Seed were harvested by combine and hand as soon as possible after maturity and after four additional weeks of field wearhering. Only the mechanically harvested seed from the first harvest were used for the drying studies. The standard germination, TZ, accelerated aging and physical damage tests were used to evaluate the effects of the treatments on seed quality. Combine harvest reduced but didn't eliminate hard seed, unex-pectedly had no effect upon viability, but resulted in reduced vigor ratings. The percent undamaged seed was higher for the D-1 seed at both harvest dates, despite the fact these seed were 5.2% lower in moisture than the Dare on the second harvest. Delayed harvest lowered viability and vigor ratings of the Dare seed, but only vigor ratings of the D-1. Artificial drying the D-1 seed increased hard seed content but had no other immediate effects on quality. There was some indication of a direct relationships between seed coat permeability and rate of moisture loss. The conclusions were: a. Combine harvest of seed with the impermeable seed coat characteristic will reduce hard seed content to agronomically acceptable levels only when the seed are near 11% moisture content. b. Seeds with the impermeable seed coat are less susceptible to physical damage than those with permeable coats, although, this difference may not be attributable to differences in seed coat permeability. c. A four week delay in combine harvest resulted in increased physical damage and decreased vigor in both seed types but did not result in decreased viability of seed with the impermeable seed coat characteristic. d. Seed having permeable seed coats germinated faster than those possessing the impermeable characteristic, however, this difference was reduced by the effects of mechanical harvest. e. Artificially drying high moisture soybean seed possessing the impermeable coat characteristic resulted in a significant increase in hard seed content. MenosThis study compared the effects of mechanical harvest and artificial drying on seed quality of soybeans having permeable (Dare) and impermeable (D-1) coats. Seed were harvested by combine and hand as soon as possible after maturity and after four additional weeks of field wearhering. Only the mechanically harvested seed from the first harvest were used for the drying studies. The standard germination, TZ, accelerated aging and physical damage tests were used to evaluate the effects of the treatments on seed quality. Combine harvest reduced but didn't eliminate hard seed, unex-pectedly had no effect upon viability, but resulted in reduced vigor ratings. The percent undamaged seed was higher for the D-1 seed at both harvest dates, despite the fact these seed were 5.2% lower in moisture than the Dare on the second harvest. Delayed harvest lowered viability and vigor ratings of the Dare seed, but only vigor ratings of the D-1. Artificial drying the D-1 seed increased hard seed content but had no other immediate effects on quality. There was some indication of a direct relationships between seed coat permeability and rate of moisture loss. The conclusions were: a. Combine harvest of seed with the impermeable seed coat characteristic will reduce hard seed content to agronomically acceptable levels only when the seed are near 11% moisture content. b. Seeds with the impermeable seed coat are less susceptible to physical damage than those with permeable coats, although, this differen... Mostrar Tudo |
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Palavras-Chave: |
Artificial drying; EUA; Hardseeded soybean; Harvest; Semente dura; USA. |
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Thesagro: |
Colheita; Secagem Artificial; Soja. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02757nam a2200241 a 4500
001 1444354
005 2009-06-01
008 1978 bl uuuu m 00u1 u #d
100 1 $aFRANCA NETO, J. de B.
245 $aResponse of hardseeded soybeans to combine harvest and artificial drying.
260 $aMississippi State: Mississippi State University. 1978.$c1978
300 $a123p.
500 $aM.Sc. Thesis.
520 $aThis study compared the effects of mechanical harvest and artificial drying on seed quality of soybeans having permeable (Dare) and impermeable (D-1) coats. Seed were harvested by combine and hand as soon as possible after maturity and after four additional weeks of field wearhering. Only the mechanically harvested seed from the first harvest were used for the drying studies. The standard germination, TZ, accelerated aging and physical damage tests were used to evaluate the effects of the treatments on seed quality. Combine harvest reduced but didn't eliminate hard seed, unex-pectedly had no effect upon viability, but resulted in reduced vigor ratings. The percent undamaged seed was higher for the D-1 seed at both harvest dates, despite the fact these seed were 5.2% lower in moisture than the Dare on the second harvest. Delayed harvest lowered viability and vigor ratings of the Dare seed, but only vigor ratings of the D-1. Artificial drying the D-1 seed increased hard seed content but had no other immediate effects on quality. There was some indication of a direct relationships between seed coat permeability and rate of moisture loss. The conclusions were: a. Combine harvest of seed with the impermeable seed coat characteristic will reduce hard seed content to agronomically acceptable levels only when the seed are near 11% moisture content. b. Seeds with the impermeable seed coat are less susceptible to physical damage than those with permeable coats, although, this difference may not be attributable to differences in seed coat permeability. c. A four week delay in combine harvest resulted in increased physical damage and decreased vigor in both seed types but did not result in decreased viability of seed with the impermeable seed coat characteristic. d. Seed having permeable seed coats germinated faster than those possessing the impermeable characteristic, however, this difference was reduced by the effects of mechanical harvest. e. Artificially drying high moisture soybean seed possessing the impermeable coat characteristic resulted in a significant increase in hard seed content.
650 $aColheita
650 $aSecagem Artificial
650 $aSoja
653 $aArtificial drying
653 $aEUA
653 $aHardseeded soybean
653 $aHarvest
653 $aSemente dura
653 $aUSA
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Registro original: |
Embrapa Soja (CNPSO) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
04/03/2010 |
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Data da última atualização: |
04/03/2010 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
ALLEONI, L. R. F.; MELLO, J. W. V. de; ROCHA, W. S. D. da. |
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Afiliação: |
LUÍS REYNALDO FERRACCIÚ ALLEONI, Esalq/USP; JAIME WILSON VARGAS DE MELLO, UFV; WADSON SEBASTIAO DUARTE DA ROCHA, CNPGL. |
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Título: |
Eletroquímica, adsorção e troca iônica no solo. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
In: MELO, V. de F.; ALLEONI, L. R. F. Química e mineralogia do solo: parte II - aplicações. Viçosa, MG: Sociedade Brasileira de Ciência do Solo, 2009. |
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Páginas: |
p. 70-126. |
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Idioma: |
Português |
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Conteúdo: |
Superfícies carregadas e interação soluto/solo ; Importância da área superficial específica dos minerais ; Tipos de superfícies elétricas ; Componentes de carga de superfície ; Interface superfície-solução ; Ponto de carga zero (PCZ) ; Medidas de carga superficial ; Fatores que influem na carga superficial ; Dispersão - floculação ; Manipulação da carga para controlar as interações do soluto ; Adsorção e troca iônica ; Equações de adsorção ; Formulações envolvendo ação de massa ; Equações derivadas de modelos estatísticos. |
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Palavras-Chave: |
Solo - carga superficial; Solo - mineralogia. |
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Thesagro: |
Química do Solo. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 01201naa a2200193 a 4500
001 1659883
005 2010-03-04
008 2009 bl --- 0-- u #d
100 1 $aALLEONI, L. R. F.
245 $aEletroquímica, adsorção e troca iônica no solo.
260 $c2009
300 $ap. 70-126.
520 $aSuperfícies carregadas e interação soluto/solo ; Importância da área superficial específica dos minerais ; Tipos de superfícies elétricas ; Componentes de carga de superfície ; Interface superfície-solução ; Ponto de carga zero (PCZ) ; Medidas de carga superficial ; Fatores que influem na carga superficial ; Dispersão - floculação ; Manipulação da carga para controlar as interações do soluto ; Adsorção e troca iônica ; Equações de adsorção ; Formulações envolvendo ação de massa ; Equações derivadas de modelos estatísticos.
650 $aQuímica do Solo
653 $aSolo - carga superficial
653 $aSolo - mineralogia
700 1 $aMELLO, J. W. V. de
700 1 $aROCHA, W. S. D. da
773 $tIn: MELO, V. de F.; ALLEONI, L. R. F. Química e mineralogia do solo: parte II - aplicações. Viçosa, MG: Sociedade Brasileira de Ciência do Solo, 2009.
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