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resumen

Resumen
Delaying maize (Zea mays L.) sowing date can diminish grain yields through reductions in the number, size and activity of growing grains (sink strength) and/or reductions in the assimilate supply (source capacity) to grains during the grain filling period. Whether the source capacity or the sink strength is the limiting factor for grain yield in late sown maize still remains unclear. Understanding source-sink relationships is relevant to optimize crop [ver mas...]
dc.contributor.authorBonelli, Lucas Emmanuel
dc.contributor.authorMonzon, Juan Pablo
dc.contributor.authorCerrudo, Aníbal Alejandro
dc.contributor.authorRizzalli, Roberto H.
dc.contributor.authorAndrade, Fernando Hector
dc.date.accessioned2019-05-02T11:50:18Z
dc.date.available2019-05-02T11:50:18Z
dc.date.issued2016-11
dc.identifier.issn0378-4290
dc.identifier.otherhttps://doi.org/10.1016/j.fcr.2016.09.003
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0378429016303082
dc.identifier.urihttp://hdl.handle.net/20.500.12123/5018
dc.description.abstractDelaying maize (Zea mays L.) sowing date can diminish grain yields through reductions in the number, size and activity of growing grains (sink strength) and/or reductions in the assimilate supply (source capacity) to grains during the grain filling period. Whether the source capacity or the sink strength is the limiting factor for grain yield in late sown maize still remains unclear. Understanding source-sink relationships is relevant to optimize crop management practices, to identify critical processes for crop modelling and to develop breeding strategies. The objective of this work was to assess the effect of delays in maize sowing date on grain yield components and on the source-sink relationship during the grain filling period. Three well irrigated and fertilized maize field experiments were conducted at Balcarce, Argentina (37° 45′ S, 58° 18′ W; 130 m a.s.l.) during 2009–10; 2010–11 and 2011–12 cropping seasons. Sowing dates ranged from October to January covering a broad range of the seasonal photo-thermal variation. Grain yield was affected by sowing date and varied from 1680 g m−2 (early sowings) to 203 g m−2 (late sowings). Grain number per unit area was reduced proportionally less than weight per grain as sowing date was delayed. Variations in grain yield were related to the harvest index, and were closely associated with dry matter accumulation during the post-silking period. The variation of source capacity was higher than that of sink strength during the grain filling period and the source/sink ratio decreased from early to late sowing dates. Results indicate that crop growth during the grain filling period was limited by the sink strength in early sowing dates and by the photosynthetic source capacity in the late ones.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherElsevieres_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceField Crops Research 198 : 215-225 (November 2016)es_AR
dc.subjectMaízes_AR
dc.subjectMaizeeng
dc.subjectZea Mayses_AR
dc.subjectFecha de Siembraes_AR
dc.subjectSowing Dateeng
dc.subjectRendimientoes_AR
dc.subjectYieldseng
dc.subjectCaracteres de Rendimientoes_AR
dc.subjectYield Componentseng
dc.subjectRadiaciónes_AR
dc.subjectRadiationeng
dc.titleMaize grain yield components and source-sink relationship as affected by the delay in sowing datees_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.origenEEA Balcarcees_AR
dc.description.filFil: Bonelli, Lucas Emmanuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentinaes_AR
dc.description.filFil: Monzon, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.es_AR
dc.description.filFil: Cerrudo, Aníbal Alejandro. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina.es_AR
dc.description.filFil: Rizzalli, Roberto H.. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentinaes_AR
dc.description.filFil: Andrade, Fernando Hector. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Mar del Plata. Facultad de Ciencias Agrarias; Argentina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Balcarce; Argentina.es_AR
dc.subtypecientifico


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