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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Clima Temperado. |
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Data corrente: |
22/08/1995 |
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Data da última atualização: |
23/04/1999 |
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Autoria: |
BORBA, C. S. |
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Título: |
Some relationships of seed quality and planting date to development and seed production of soybean (Glycine max (L.) Merrill). |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
Mississippi: Mississippi State University, 1986. |
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Páginas: |
63p. |
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Idioma: |
Inglês |
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Notas: |
Tese Doutorado. |
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Conteúdo: |
The influence of soybean (Glycine max (L.) Merrill) seed quality on plant performance has been investigated, but previous studies did not evaluate the effects of planting date. This study was conducted to evaluate the effects of physiological quality of seed when planted on optimum and post-optimum dates on both agronomic and seed quality characteristics of early and late maturity soybean. In both 1984 and 1985, an equal or higher percentage of seedlings emerged from plots planted with higher quality seed, although emergence percentages were 20% less from the optimum date plantings than the post-optimum date plantings due to an extended of dry weather following the initial plantings. In contrast seed quality had no significant effect upon plant, height, height of lower most pod, number of barren plants, lodging or final stand in either year. Plots planted with high qality seed in 1985 produced significantly higher yields (69Kg/ha) than those planted with lower quality seed. This difference was not observed in 1984. Planting at the optimum time maximized yields of both cultivars. The viability and vigor of seed harvested from plants off each planting date and cultivar differed significantly each year. This indicated that the post-maturation, pre-harvest environment exerted a greater influence on quality of the seed produced than planting or cultivar maturity date. It was concluded that planting high quality seed will result in a higher emergence percentage of seedlings over a range of seedbed conditions than planting seed of lower quality. On the other hand, seed quality at the levels used in this study had no consistent effcts upon the agronomic characteristics measured. Further, planting during the optimum time maximized yields of both cultivars but did not necessarily result in production of good quality soybean seed. Finally, because of the influence of the post-maturaton, pre-harvest, soybean seed should be harvested at the earliest time practical regardless of cultivar or planting date. MenosThe influence of soybean (Glycine max (L.) Merrill) seed quality on plant performance has been investigated, but previous studies did not evaluate the effects of planting date. This study was conducted to evaluate the effects of physiological quality of seed when planted on optimum and post-optimum dates on both agronomic and seed quality characteristics of early and late maturity soybean. In both 1984 and 1985, an equal or higher percentage of seedlings emerged from plots planted with higher quality seed, although emergence percentages were 20% less from the optimum date plantings than the post-optimum date plantings due to an extended of dry weather following the initial plantings. In contrast seed quality had no significant effect upon plant, height, height of lower most pod, number of barren plants, lodging or final stand in either year. Plots planted with high qality seed in 1985 produced significantly higher yields (69Kg/ha) than those planted with lower quality seed. This difference was not observed in 1984. Planting at the optimum time maximized yields of both cultivars. The viability and vigor of seed harvested from plants off each planting date and cultivar differed significantly each year. This indicated that the post-maturation, pre-harvest environment exerted a greater influence on quality of the seed produced than planting or cultivar maturity date. It was concluded that planting high quality seed will result in a higher emergence percentage of seedlings over a... Mostrar Tudo |
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Palavras-Chave: |
Cultivation; Production data; Quality; Seed. |
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Thesagro: |
Época de Plantio; Fisiologia; Glycine Max; Plantio; Produção; Qualidade; Semente; Soja. |
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Thesaurus Nal: |
planting date; soybeans. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02825nam a2200301 a 4500
001 1563266
005 1999-04-23
008 1986 bl uuuu m 00u1 u #d
100 1 $aBORBA, C. S.
245 $aSome relationships of seed quality and planting date to development and seed production of soybean (Glycine max (L.) Merrill).
260 $aMississippi: Mississippi State University$c1986
300 $a63p.
500 $aTese Doutorado.
520 $aThe influence of soybean (Glycine max (L.) Merrill) seed quality on plant performance has been investigated, but previous studies did not evaluate the effects of planting date. This study was conducted to evaluate the effects of physiological quality of seed when planted on optimum and post-optimum dates on both agronomic and seed quality characteristics of early and late maturity soybean. In both 1984 and 1985, an equal or higher percentage of seedlings emerged from plots planted with higher quality seed, although emergence percentages were 20% less from the optimum date plantings than the post-optimum date plantings due to an extended of dry weather following the initial plantings. In contrast seed quality had no significant effect upon plant, height, height of lower most pod, number of barren plants, lodging or final stand in either year. Plots planted with high qality seed in 1985 produced significantly higher yields (69Kg/ha) than those planted with lower quality seed. This difference was not observed in 1984. Planting at the optimum time maximized yields of both cultivars. The viability and vigor of seed harvested from plants off each planting date and cultivar differed significantly each year. This indicated that the post-maturation, pre-harvest environment exerted a greater influence on quality of the seed produced than planting or cultivar maturity date. It was concluded that planting high quality seed will result in a higher emergence percentage of seedlings over a range of seedbed conditions than planting seed of lower quality. On the other hand, seed quality at the levels used in this study had no consistent effcts upon the agronomic characteristics measured. Further, planting during the optimum time maximized yields of both cultivars but did not necessarily result in production of good quality soybean seed. Finally, because of the influence of the post-maturaton, pre-harvest, soybean seed should be harvested at the earliest time practical regardless of cultivar or planting date.
650 $aplanting date
650 $asoybeans
650 $aÉpoca de Plantio
650 $aFisiologia
650 $aGlycine Max
650 $aPlantio
650 $aProdução
650 $aQualidade
650 $aSemente
650 $aSoja
653 $aCultivation
653 $aProduction data
653 $aQuality
653 $aSeed
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Embrapa Cerrados (CPAC) |
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