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Registro Completo |
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Biblioteca(s): |
Embrapa Soja; Embrapa Trigo. |
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Data corrente: |
18/12/1995 |
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Data da última atualização: |
01/06/2006 |
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Autoria: |
PEREIRA, L. A. G. |
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Título: |
Planting dates and maturation relationships in soybean [Glycine max (L.) Merrill] seeds. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Mississippi State: Mississippi State University, 1982. |
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Páginas: |
99p. |
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Idioma: |
Inglês |
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Notas: |
Ph.D. Dissertation. |
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Conteúdo: |
Two commercial soybean cultivars and a hardseeded breeding line-- 'Hill', 'Bragg' and D-67-5677-1 ('D-1'), respectively, were planted in April, May, June and July during 1980 and 1981 to study the effects of planting dates on some seed quality characteristics. Harvests were made from leaf yellowing to field maturity. Seed were evaluated for moisture content, dry weight, carbohydrate leachates and electrical conductivity. Standard germination was performed after completing all harvests and storing the seed under ambient laboratory conditions. Delaying planting from May to June caused a 10-day maturation delay of Hill which could result in the seed escaping adversely high temepratures at maturity. There were no substantial differences in germination among seeds from different plantings. However, D-1 showed generally lower values for seeds from early planting in 1980 which might indicate that it is more sensitive to high temperature/low moisture stress which was particularly severe in that year. Such results were not evident dor D-1 seeds of the late 1980 plantings as well as during 1981. Within planting dates germinations of Hill and D-1 were usually low for the first harvests, increased towards physiological maturity and declined somewhat at field maturity. Bragg, however, showed tittle variability and was generally high up to field maturity. At full maturity carbohydrate leachates were usually high for seed from early plantings, but this was not constant in both years. Within plantings carbohydrate leachates responded quadratically with a minimum at or near physiological maturity except for D-1 seeds which exudated in a decreasing linear fashion in 1980. In 1981, however, the linearity did not hold true. After physiological maturity, leachates from Hill and Bragg seeds increased, probably as a result of disorganization of membranes as dehydration progressed. Electrical conductivity measurements exhibited similar patterns to the carbohydrate leachates. Seeds of Hill showed higher readings than did seeds of the other two cultivars. The increase in leachates (carbohydrates and electrolytes) after physiological maturity might indicate that progressive damage to membranes and release of substrates for microorganisms are potential hazards to be considered before field maturity is reached. MenosTwo commercial soybean cultivars and a hardseeded breeding line-- 'Hill', 'Bragg' and D-67-5677-1 ('D-1'), respectively, were planted in April, May, June and July during 1980 and 1981 to study the effects of planting dates on some seed quality characteristics. Harvests were made from leaf yellowing to field maturity. Seed were evaluated for moisture content, dry weight, carbohydrate leachates and electrical conductivity. Standard germination was performed after completing all harvests and storing the seed under ambient laboratory conditions. Delaying planting from May to June caused a 10-day maturation delay of Hill which could result in the seed escaping adversely high temepratures at maturity. There were no substantial differences in germination among seeds from different plantings. However, D-1 showed generally lower values for seeds from early planting in 1980 which might indicate that it is more sensitive to high temperature/low moisture stress which was particularly severe in that year. Such results were not evident dor D-1 seeds of the late 1980 plantings as well as during 1981. Within planting dates germinations of Hill and D-1 were usually low for the first harvests, increased towards physiological maturity and declined somewhat at field maturity. Bragg, however, showed tittle variability and was generally high up to field maturity. At full maturity carbohydrate leachates were usually high for seed from early plantings, but this was not constant in both years. Withi... Mostrar Tudo |
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Palavras-Chave: |
EUA; Maturation; Seed; Soybean; USA. |
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Thesagro: |
Época de Semeadura; Glycine Max; Maturação; Semente; Soja. |
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Thesaurus Nal: |
sowing date. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03005nam a2200265 a 4500
001 1444442
005 2006-06-01
008 1982 bl uuuu m 00u1 u #d
100 1 $aPEREIRA, L. A. G.
245 $aPlanting dates and maturation relationships in soybean [Glycine max (L.) Merrill] seeds.
260 $aMississippi State: Mississippi State University$c1982
300 $a99p.
500 $aPh.D. Dissertation.
520 $aTwo commercial soybean cultivars and a hardseeded breeding line-- 'Hill', 'Bragg' and D-67-5677-1 ('D-1'), respectively, were planted in April, May, June and July during 1980 and 1981 to study the effects of planting dates on some seed quality characteristics. Harvests were made from leaf yellowing to field maturity. Seed were evaluated for moisture content, dry weight, carbohydrate leachates and electrical conductivity. Standard germination was performed after completing all harvests and storing the seed under ambient laboratory conditions. Delaying planting from May to June caused a 10-day maturation delay of Hill which could result in the seed escaping adversely high temepratures at maturity. There were no substantial differences in germination among seeds from different plantings. However, D-1 showed generally lower values for seeds from early planting in 1980 which might indicate that it is more sensitive to high temperature/low moisture stress which was particularly severe in that year. Such results were not evident dor D-1 seeds of the late 1980 plantings as well as during 1981. Within planting dates germinations of Hill and D-1 were usually low for the first harvests, increased towards physiological maturity and declined somewhat at field maturity. Bragg, however, showed tittle variability and was generally high up to field maturity. At full maturity carbohydrate leachates were usually high for seed from early plantings, but this was not constant in both years. Within plantings carbohydrate leachates responded quadratically with a minimum at or near physiological maturity except for D-1 seeds which exudated in a decreasing linear fashion in 1980. In 1981, however, the linearity did not hold true. After physiological maturity, leachates from Hill and Bragg seeds increased, probably as a result of disorganization of membranes as dehydration progressed. Electrical conductivity measurements exhibited similar patterns to the carbohydrate leachates. Seeds of Hill showed higher readings than did seeds of the other two cultivars. The increase in leachates (carbohydrates and electrolytes) after physiological maturity might indicate that progressive damage to membranes and release of substrates for microorganisms are potential hazards to be considered before field maturity is reached.
650 $asowing date
650 $aÉpoca de Semeadura
650 $aGlycine Max
650 $aMaturação
650 $aSemente
650 $aSoja
653 $aEUA
653 $aMaturation
653 $aSeed
653 $aSoybean
653 $aUSA
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Registro original: |
Embrapa Soja (CNPSO) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Ocidental. Para informações adicionais entre em contato com cpaa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Ocidental. |
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Data corrente: |
28/01/2020 |
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Data da última atualização: |
28/01/2020 |
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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: |
DINKELMEYER, H.; LEHMANN, J.; RENCK, A.; TRUJILLO, L.; SILVA JUNIOR, J. P. da; GEBAUER, G.; KAISER, K. |
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Afiliação: |
Harald Dinkelmeyer, University of Bayreuth; Johannes Lehmann, University of Bayreuth; Andreas Renck, University of Bayreuth; Lucerina Trujillo; JOSE PEREIRA DA SILVA JUNIOR, CPAA; Gerhard Gebauer, University of Bayreuth; Klaus Kaiser, University of Bayreuth. |
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Título: |
Nitrogen uptake from15N-enriched fertilizer by four tree crops in an Amazonian agroforest. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Agroforestry Systems, v. 57, p. 213-224, 2003. |
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Idioma: |
Português |
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Thesaurus NAL: |
Humid tropics. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00575naa a2200193 a 4500
001 2119496
005 2020-01-28
008 2003 bl uuuu u00u1 u #d
100 1 $aDINKELMEYER, H.
245 $aNitrogen uptake from15N-enriched fertilizer by four tree crops in an Amazonian agroforest.$h[electronic resource]
260 $c2003
650 $aHumid tropics
700 1 $aLEHMANN, J.
700 1 $aRENCK, A.
700 1 $aTRUJILLO, L.
700 1 $aSILVA JUNIOR, J. P. da
700 1 $aGEBAUER, G.
700 1 $aKAISER, K.
773 $tAgroforestry Systems$gv. 57, p. 213-224, 2003.
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Embrapa Amazônia Ocidental (CPAA) |
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