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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
03/10/2014 |
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Data da última atualização: |
07/04/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LUCA, M. J. de; NOGUEIRA, M. A.; HUNGRIA, M. |
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Afiliação: |
MARCOS JAVIER DE LUCA, INTA; MARCO ANTONIO NOGUEIRA, CNPSO; MARIANGELA HUNGRIA DA CUNHA, CNPSO. |
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Título: |
Feasibility of lowering soybean planting density without compromising nitrogen fixation and yield. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Agronomy Journal, Madison, v. 106, n. 6, p. 2118-2124, 2014. |
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Idioma: |
Inglês |
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Conteúdo: |
Adjusting soybean [Glycine max (L.) Merrill] density can be critical to reduce inter-plant competition for water, nutrients, and sunlight, and to increase intercepted radiation, photosynthesis, and biomass production. The objective of this study was to evaluate the effects of soybean-population density on soybean nodulation, plant nutrient status, yield, and grain quality. Three field experiments were performed in southern Brazil with soybean cultivar BRS 284, of indeterminate growth type and maturity group 6.6, at 80,000 and 320,000 plants ha?1. For N supply plants were dependent either largely on biological fixation of atmospheric N?with a naturalized population of Bradyrhizobium or inoculated with Bradyrhizobium japonicum strain CNPSo 2050?or largely on N fertilizer?200 kg N ha?1, split-applied at sowing and R1 growth stage. The lower plant density resulted in increased nodulation parameters (number and mass), but plant nutritional status?evaluated by the diagnosis and recommendation integrated system (DRIS) method?in general was not affected. Seed oil content increased by 3.4%, but protein decreased by 4.5% at the lower plant density. The N source affected nodulation, but not nutritional status or grain yield. Although plant density was reduced by 75%, yield decreased by 16% during only one of the three cropping seasons. These results indicate a high plasticity of soybean to adapt photosynthesis and N fixation to different plant densities. Furthermore, planting at the lower density has the advantages of lower input costs and less susceptibility to environmental and plant nutritional stresses. MenosAdjusting soybean [Glycine max (L.) Merrill] density can be critical to reduce inter-plant competition for water, nutrients, and sunlight, and to increase intercepted radiation, photosynthesis, and biomass production. The objective of this study was to evaluate the effects of soybean-population density on soybean nodulation, plant nutrient status, yield, and grain quality. Three field experiments were performed in southern Brazil with soybean cultivar BRS 284, of indeterminate growth type and maturity group 6.6, at 80,000 and 320,000 plants ha?1. For N supply plants were dependent either largely on biological fixation of atmospheric N?with a naturalized population of Bradyrhizobium or inoculated with Bradyrhizobium japonicum strain CNPSo 2050?or largely on N fertilizer?200 kg N ha?1, split-applied at sowing and R1 growth stage. The lower plant density resulted in increased nodulation parameters (number and mass), but plant nutritional status?evaluated by the diagnosis and recommendation integrated system (DRIS) method?in general was not affected. Seed oil content increased by 3.4%, but protein decreased by 4.5% at the lower plant density. The N source affected nodulation, but not nutritional status or grain yield. Although plant density was reduced by 75%, yield decreased by 16% during only one of the three cropping seasons. These results indicate a high plasticity of soybean to adapt photosynthesis and N fixation to different plant densities. Furthermore, planting at the lo... Mostrar Tudo |
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Thesagro: |
Soja. |
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Categoria do assunto: |
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Marc: |
LEADER 02110naa a2200157 a 4500
001 1996509
005 2022-04-07
008 2014 bl uuuu u00u1 u #d
100 1 $aLUCA, M. J. de
245 $aFeasibility of lowering soybean planting density without compromising nitrogen fixation and yield.$h[electronic resource]
260 $c2014
520 $aAdjusting soybean [Glycine max (L.) Merrill] density can be critical to reduce inter-plant competition for water, nutrients, and sunlight, and to increase intercepted radiation, photosynthesis, and biomass production. The objective of this study was to evaluate the effects of soybean-population density on soybean nodulation, plant nutrient status, yield, and grain quality. Three field experiments were performed in southern Brazil with soybean cultivar BRS 284, of indeterminate growth type and maturity group 6.6, at 80,000 and 320,000 plants ha?1. For N supply plants were dependent either largely on biological fixation of atmospheric N?with a naturalized population of Bradyrhizobium or inoculated with Bradyrhizobium japonicum strain CNPSo 2050?or largely on N fertilizer?200 kg N ha?1, split-applied at sowing and R1 growth stage. The lower plant density resulted in increased nodulation parameters (number and mass), but plant nutritional status?evaluated by the diagnosis and recommendation integrated system (DRIS) method?in general was not affected. Seed oil content increased by 3.4%, but protein decreased by 4.5% at the lower plant density. The N source affected nodulation, but not nutritional status or grain yield. Although plant density was reduced by 75%, yield decreased by 16% during only one of the three cropping seasons. These results indicate a high plasticity of soybean to adapt photosynthesis and N fixation to different plant densities. Furthermore, planting at the lower density has the advantages of lower input costs and less susceptibility to environmental and plant nutritional stresses.
650 $aSoja
700 1 $aNOGUEIRA, M. A.
700 1 $aHUNGRIA, M.
773 $tAgronomy Journal, Madison$gv. 106, n. 6, p. 2118-2124, 2014.
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| 1. |  | TONIETTO, J.; RUIZ, V. S.; ZANUS, M. C.; MONTESL, C.; ULLARTE, E. M.; BRUNO, L. A. T.; CLLMAC0, P.; PENA, A.; GUERRA, C. C.; CATANIA, C. D.; KOHLBERG, E. J.; PEREIRA, G. E.; RICARDO-DA-SILVA, J. M.; RAGOUTI, J. V.; NAVARRO, L. V.; LAUREAN0, O.; CASTR0, R. de; DEL MONTE, R. F.; DEL MONTE, S. A. de; GOMEZ-MIGUEL, V.; CARBONNEAU, A. L'effet du climat viticole sur Ia typicité des vins blancs : caractérisation au niveau des régions viticoles ibéro-américaines. CONGRES DES TERROIRS VITIVINICOLES. 9., 2012, Bourgogne, France. Actes... Bourgogne, Dijon; Champgne, Reims, CIVC, 25 a 29 Juin 2012. 2-37| Tipo: Artigo em Anais de Congresso |
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