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Abstract
The effects of plant density on broccoli (Brassica oleracea L. var. italica Plenck) commercial characteristics are well determined. However, it is not completely clear how the broccoli plant respond to changes in plant shading as a result of different plant densities. The objective of this experiment was to determine the effect of plant density on intercepted photosynthetically active radiation (PAR), plant architecture, and plant growth and production. [ver mas...]
dc.contributor.authorFrancescangeli, Nora
dc.contributor.authorSangiacomo, Miguel Angel
dc.contributor.authorMartí, Hector Ruben
dc.date.accessioned2019-11-21T13:06:47Z
dc.date.available2019-11-21T13:06:47Z
dc.date.issued2006
dc.identifier.issn0304-4238
dc.identifier.otherhttps://doi.org/10.1016/j.scienta.2006.06.025
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0304423806002731
dc.identifier.urihttp://hdl.handle.net/20.500.12123/6360
dc.description.abstractThe effects of plant density on broccoli (Brassica oleracea L. var. italica Plenck) commercial characteristics are well determined. However, it is not completely clear how the broccoli plant respond to changes in plant shading as a result of different plant densities. The objective of this experiment was to determine the effect of plant density on intercepted photosynthetically active radiation (PAR), plant architecture, and plant growth and production. “Legacy” broccoli plants were grown in pots in a greenhouse in the seasons of 2002 and 2003 at 2, 4, 6 or 8 plants m−2 (temperatures: between 10.0 and 16.1 °C, average incident PAR: 12 mol m−2 day−1). Plant density affected the intercepted and accumulated PAR. There were not effects on the length of the vegetative and reproductive periods, the total and final number of leaves, and the spear diameter and fresh weight. The magnitude and evolution of leaf area (LA) was independent of plant density up to 70 days after transplant (dat). Since then on, LA increased linearly with plant density. The highest intercepted PAR was 70–72% with 6–8 plants m−2. With the increase in plant density: the erectness of the upper leaves and stem length increased, the extinction coefficient decreased and commercial spear (inflorescence plus a portion of stem 10 cm long) weight decreased (but it was due to the stem portion of the spear and not to the edible portion). On an area basis, the decrease in commercial spear weight with plant density was more than compensated by the higher number of plants. The radiation use efficiency (RUE) increased proportionally with the leaf area index (LAI) up to a LAI of about 3, and then stabilized. The only effect of plant density on dry weight partitioning was to decrease the dry weight allocated to the stem portion of the spear. As plant density increased, and consequently the degree of shading increased, the net assimilation rate (NAR) decreased and the leaf area ratio (LAR) increased. This compensatory change between NAR and LAR, kept the relative growth rate (RGR) for individual plants almost constant.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherElsevieres_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceScientia Horticulturae 110 (2) : 135-143. (October 2006)es_AR
dc.subjectHortalizas de Inflorescenciaes_AR
dc.subjectInflorescence Vegetableseng
dc.subjectCultivo de Crucíferases_AR
dc.subjectCole Cropseng
dc.subjectBrúcolies_AR
dc.subjectBroccolieng
dc.subjectBrassica Oleracea Italicaes_AR
dc.subjectEspaciamientoes_AR
dc.subjectSpacingeng
dc.subjectUmbríaes_AR
dc.subjectShadingeng
dc.subjectRendimientoes_AR
dc.subjectYieldseng
dc.subjectRadiaciónes_AR
dc.subjectRadiationeng
dc.subjectCrecimientoes_AR
dc.subjectGrowtheng
dc.subjectSuperficie Foliares_AR
dc.subjectLeaf Areaeng
dc.subjectÍndice de Superficie Foliares_AR
dc.subjectLeaf Area Indexeng
dc.subject.otherRadiación Fotosintéticamente Activaes_AR
dc.subject.otherPhotosynthetically Active Radiationeng
dc.subject.otherEficiencia en el Uso de la Radiaciónes_AR
dc.subject.otherRadiation-use efficiencyeng
dc.subject.otherTasa de Asimilación Netaes_AR
dc.subject.otherNet Assimilation Rateeng
dc.subject.otherTasa de Crecimiento Relativoes_AR
dc.subject.otherRelative Growth Rateeng
dc.subject.otherRelación de Área Foliares_AR
dc.subject.otherLeaf Area Ratioeng
dc.titleEffects of plant density in broccoli on yield and radiation use efficiencyes_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 San Pedroes_AR
dc.description.filFil: Francescangeli, Nora. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Pedro; Argentinaes_AR
dc.description.filFil: Sangiacomo, Miguel Angel. Universidad Nacional de Luján, Departamento de Tecnología; Argentinaes_AR
dc.description.filFil: Martí, Héctor Rubén. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Pedro; Argentinaes_AR
dc.subtypecientifico


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