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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
06/02/1997 |
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Data da última atualização: |
06/02/1997 |
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Autoria: |
MALAVOLTA, E. |
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Título: |
Estudos quimico - agricolas sobre o enxofre. |
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Ano de publicação: |
1951 |
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Fonte/Imprenta: |
Anais da Escola Superior de Agricultura Luiz de Queiroz, v.9, p.39-130, 1952. |
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Idioma: |
Português |
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Notas: |
Tese de Livre Docencia defendida na ESALQ, Piracicaba em 19951. |
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Conteúdo: |
1. Analyses of soluble sulphates in 2 N ammonium chloride extracts of 24 samples of soils of the state of Sao Paulo, Brazil, S.A., showed a sulphur content varying from 0,0013 g per 100 g (found in the b layer of a genuine "terra roxa") to 0,007 g per 100 g of soil (b layer of a soil of depression without definite characteristics). (The results are expressed as elemental sulphur). Determinations of total suphur in 56 samples of soils of the same state using the method of fusion with sodium carbonate and sodium nitrate revealed 0.007 g of elemental S per 100 g of soil as the lowest value (found in several soil types) and 0.096 g as the highest one (found in the b layer of an arquean soil). Apparently soluble suphates accumulate in the upper layers and total su-lphur does the opposite. It was foun a strong correlation between total S and cabon content. 2. Under laboratory conditions, in a compost of fresh soil, powdered sulphur and apatite, it was verified after a three months period of incubation that the pH value lowered from 6.30 to 3.23; the citric acid solubility of apatite increased to 271.1 per cent of the original one. Lupinus sp. grown in soil manured with sulphur and apatite has showed fresh and dry weights higher than the plants in control pots; the results are significant at 5% level of probability; phophorus content is also higher in the manured plants. It was observed a net influence of the apatite plus sulphur treatment on the weight of root modosities that was four times greater than in the ... Menos1. Analyses of soluble sulphates in 2 N ammonium chloride extracts of 24 samples of soils of the state of Sao Paulo, Brazil, S.A., showed a sulphur content varying from 0,0013 g per 100 g (found in the b layer of a genuine "terra roxa") to 0,007 g per 100 g of soil (b layer of a soil of depression without definite characteristics). (The results are expressed as elemental sulphur). Determinations of total suphur in 56 samples of soils of the same state using the method of fusion with sodium carbonate and sodium nitrate revealed 0.007 g of elemental S per 100 g of soil as the lowest value (found in several soil types) and 0.096 g as the highest one (found in the b layer of an arquean soil). Apparently soluble suphates accumulate in the upper layers and total su-lphur does the opposite. It was foun a strong correlation between total S and cabon content. 2. Under laboratory conditions, in a compost of fresh soil, powdered sulphur and apatite, it was verified after a three months period of incubation that the pH value lowered from 6.30 to 3.23; the citric acid solubility of apatite increased to 271.1 per cent of the original one. Lupinus sp. grown in soil manured with sulphur and apatite has showed fresh and dry weights higher than the plants in control pots; the results are significant at 5% level of probability; phophorus content is also higher in the manured plants. It was observed a net influence of the apatite plus sulphur treatment on the weight of root modosities that was... Mostrar Tudo |
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Palavras-Chave: |
Lycopersicum esculentum; Plant soilrelations; Plants; Relacao solo - planta; Sulphur. |
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Thesagro: |
Enxofre; Planta; Solo; Tomate. |
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Thesaurus Nal: |
soil; tomatoes. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02242nam a2200253 a 4500
001 1556685
005 1997-02-06
008 1951 bl uuuu m 00u1 u #d
100 1 $aMALAVOLTA, E.
245 $aEstudos quimico - agricolas sobre o enxofre.
260 $aAnais da Escola Superior de Agricultura Luiz de Queiroz, v.9, p.39-130, 1952.$c1951
500 $aTese de Livre Docencia defendida na ESALQ, Piracicaba em 19951.
520 $a1. Analyses of soluble sulphates in 2 N ammonium chloride extracts of 24 samples of soils of the state of Sao Paulo, Brazil, S.A., showed a sulphur content varying from 0,0013 g per 100 g (found in the b layer of a genuine "terra roxa") to 0,007 g per 100 g of soil (b layer of a soil of depression without definite characteristics). (The results are expressed as elemental sulphur). Determinations of total suphur in 56 samples of soils of the same state using the method of fusion with sodium carbonate and sodium nitrate revealed 0.007 g of elemental S per 100 g of soil as the lowest value (found in several soil types) and 0.096 g as the highest one (found in the b layer of an arquean soil). Apparently soluble suphates accumulate in the upper layers and total su-lphur does the opposite. It was foun a strong correlation between total S and cabon content. 2. Under laboratory conditions, in a compost of fresh soil, powdered sulphur and apatite, it was verified after a three months period of incubation that the pH value lowered from 6.30 to 3.23; the citric acid solubility of apatite increased to 271.1 per cent of the original one. Lupinus sp. grown in soil manured with sulphur and apatite has showed fresh and dry weights higher than the plants in control pots; the results are significant at 5% level of probability; phophorus content is also higher in the manured plants. It was observed a net influence of the apatite plus sulphur treatment on the weight of root modosities that was four times greater than in the ...
650 $asoil
650 $atomatoes
650 $aEnxofre
650 $aPlanta
650 $aSolo
650 $aTomate
653 $aLycopersicum esculentum
653 $aPlant soilrelations
653 $aPlants
653 $aRelacao solo - planta
653 $aSulphur
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Registro original: |
Embrapa Cerrados (CPAC) |
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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: |
02/10/2003 |
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Data da última atualização: |
05/06/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
GUEDES, R. N. C.; LIMA, J. O. G.; SANTOS, J. P.; CRUZ, C. D. |
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Afiliação: |
EMBRAPA-CNPMS. |
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Título: |
Inheritance of Deltamethrin resistance in a Brazilian strain of maize weevil (Sitophillus zeamais Mots.). |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
International Journal of Pest Management, Londres, v. 40, n. 1, p. 103-106, 1994. |
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Idioma: |
Inglês |
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Conteúdo: |
Insecticide-impregnated paper assays were used to analyse the inheritance of Deltamethrin resistance (2634X) in a DDT-pyrethroid cross-resistant strain of maize weevil. Sitophilus zeamais Mots. from Brazil. At the KD50 the response of the F1 hybrid reciprocal crosses were very different and X2 analyses of the observed responses of F2 and F1-backcross progenies provided evidence that a single gene was responsible for resistance. Deltamethrin resistance seems to be controlled by a single recessive sex-linked gene. |
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Thesagro: |
Milho. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01064naa a2200169 a 4500
001 1487208
005 2018-06-05
008 1994 bl uuuu u00u1 u #d
100 1 $aGUEDES, R. N. C.
245 $aInheritance of Deltamethrin resistance in a Brazilian strain of maize weevil (Sitophillus zeamais Mots.).$h[electronic resource]
260 $c1994
520 $aInsecticide-impregnated paper assays were used to analyse the inheritance of Deltamethrin resistance (2634X) in a DDT-pyrethroid cross-resistant strain of maize weevil. Sitophilus zeamais Mots. from Brazil. At the KD50 the response of the F1 hybrid reciprocal crosses were very different and X2 analyses of the observed responses of F2 and F1-backcross progenies provided evidence that a single gene was responsible for resistance. Deltamethrin resistance seems to be controlled by a single recessive sex-linked gene.
650 $aMilho
700 1 $aLIMA, J. O. G.
700 1 $aSANTOS, J. P.
700 1 $aCRUZ, C. D.
773 $tInternational Journal of Pest Management, Londres$gv. 40, n. 1, p. 103-106, 1994.
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