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Crop Coefficient-based Deficit Irrigation and Planting Density for Onion: Growth, Yield, and Bulb Quality

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Crop Coefficient-based Deficit Irrigation and Planting Density for Onion: Growth, Yield, and Bulb Quality

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dc.contributor.author Leskovar, Daniel I. es_ES
dc.contributor.author Agehara, Shinsuke es_ES
dc.contributor.author Yoo, Kilsun es_ES
dc.contributor.author Pascual Seva, Nuria es_ES
dc.date.accessioned 2013-04-22T14:15:38Z
dc.date.issued 2012-01
dc.identifier.issn 0018-5345
dc.identifier.uri http://hdl.handle.net/10251/28115
dc.description.abstract [EN] Agricultural communities in the semiarid regions of the world are constantly being affected by water scarcity, increased regulations restricting water use, strong competition for irrigation water with the urban sector, and severe drought periods. Conversely, the consumer demand for high-quality and nutritious foods is increasing rapidly. A 2-year field study evaluated growth, yield, and bulb quality in response to precision planting density and deficit irrigation of onion ( Allium cepa L.) in southwest Texas. Seeds of short-day sweet onion cv. Texas Grano 1015Y were planted in the field on 11 Nov. 2007 and 30 Oct. 2008 at two planting densities (PDs), 397,000 (standard) and 484,000 (high) seeds/ha. Three irrigation rates using growth stage-specific crop co- efficients and subsurface drip were imposed after plants were fully established, 100%, 75%, and 50% crop evapotranspiration rates (ETc). Total rainfall plus irrigation received for each irrigation rate were 594, 501, and 413 mm in 2008 and 662, 574, and 486 mm in 2009. In both seasons, there were consistent trends in growth, yield, and quality parameters. Leaf fresh weight was unaffected by PD but was reduced by deficit irrigation at 50% ETc. Although increasing planting density reduced the average bulb size by 12%, it increased the number of marketable bulbs by 21% to 33% and marketable yield by 7% to 14%. In contrast, deficit irrigation showed a trend to reduce both the number of bulbs and bulb size with yield reductions of 8% to 13% at 75% ETc and 19% to 27% at 50% ETc. Neither planting density nor deficit irrigation rate had a significant effect on soluble solids content, pungency, or quercetin contents. These results suggest that growers of short-day onions in semiarid regions could adjust PDs to target high-value bulb sizes. Implementing water-conserving practices (deficit irrigation at 75% ETc rate) would result in a decrease of high-value bulb grades and modest losses in yield but not flavor or nutritional components. es_ES
dc.language Inglés es_ES
dc.publisher American Society for Horticultural Science es_ES
dc.relation.ispartof HortScience es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Allium Cepa es_ES
dc.subject Evapotranspiration es_ES
dc.subject Bulb size es_ES
dc.subject Pungency es_ES
dc.subject Flavonoids es_ES
dc.subject Quercetin es_ES
dc.subject.classification PRODUCCION VEGETAL es_ES
dc.title Crop Coefficient-based Deficit Irrigation and Planting Density for Onion: Growth, Yield, and Bulb Quality es_ES
dc.type Artículo es_ES
dc.embargo.lift 10000-01-01
dc.embargo.terms forever es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Producción Vegetal - Departament de Producció Vegetal es_ES
dc.description.bibliographicCitation Leskovar, DI.; Agehara, S.; Yoo, K.; Pascual Seva, N. (2012). Crop Coefficient-based Deficit Irrigation and Planting Density for Onion: Growth, Yield, and Bulb Quality. HortScience. (47):31-37. http://hdl.handle.net/10251/28115 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://hortsci.ashspublications.org/content/47/1/31.full.pdf+html es_ES
dc.description.upvformatpinicio 31 es_ES
dc.description.upvformatpfin 37 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.issue 47 es_ES
dc.relation.senia 208430


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