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dc.coverage.spatialColombiaspa
dc.creatorMarín, C.
dc.creatorWeiner, J.
dc.date.accessioned2020-05-06T15:37:40Z
dc.date.available2020-05-06T15:37:40Z
dc.date.created2014
dc.identifier.otherhttps://www.researchgate.net/publication/264288555_Effects_of_density_and_sowing_pattern_on_weed_suppression_and_grain_yield_in_three_varieties_of_maize_under_high_weed_pressurespa
dc.identifier.urihttp://hdl.handle.net/20.500.12010/9186
dc.description.abstractWe tested the hypothesis that improved weed suppression by maize can be achieved through increased crop density and spatial uniformity. Field experiments on three varieties of maize sown at three densities (5, 7 and 10.5 seeds m 2) and in two spatial patterns (grid pattern and rows) under very high weed pressure from Brachiaria brizantha were performed in 2012 and 2013. We measured weed biomass 1 month after sowing and at harvest, and grain yield at harvest. Density, variety and sowing pattern all had strong and significant effects on both weed biomass and yield. On average, weed biomass was reduced (by 72% in the first year and 58% in the second year), and grain yield was increased (by 48% and 44%) at the highest density in the grid pattern compared with standard sowing practices (medium density, row pattern). There was a significant density 9 variety interaction, which is evidence for genetic differences in the response of the varieties to density in characteristics that influence weed suppression. The variety that suppressed weeds best at high density had the lowest variation in the angle of insertion of the oldest living leaf at harvest (leaf 6), supporting the hypothesis that reduced phenotypic plasticity may be advantageous for weed suppression under high density and spatial uniformity. Increased density and uniformity can contribute to weed management in maize in many cases, potentially reducing the need for herbicides or mechanical weed control.spa
dc.format.extent8 páginasspa
dc.format.mimetypeimage/jepgspa
dc.subjectCrop/weed competitionspa
dc.subjectPhenotypic plasticityspa
dc.subjectSowing densityspa
dc.subjectSpatial uniformityspa
dc.subjectBrachiaria brizanthaspa
dc.subjectZea maysspa
dc.titleEffects of density and sowing pattern on weed suppression and grain yield in three varieties of maize under high weed pressurespa
dc.type.localArtículospa
dc.subject.lembMaíz - Siembraspa
dc.subject.lembSiembra -- Investigacionesspa
dc.type.hasversioninfo:eu-repo/semantics/acceptedVersionspa
dc.rights.localAbierto (Texto Completo)spa
dc.identifier.repourlhttp://expeditiorepositorio.utadeo.edu.cospa
dc.format.rda1 recurso en línea (archivo de texto)spa
dc.description.rdaRequerimientos de sistema: Adobe Acrobat Readerspa
dc.type.driverinfo:eu-repo/semantics/articlespa


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