Studies of Calcium and Magnesium Usage by Subirrigated Pot Chrysanthemums

dc.contributor.advisorShelp, Barry
dc.contributor.advisorBozzo, Gale
dc.contributor.authorDuncan Stephens, Skye
dc.date.accessioned2020-10-09T19:25:27Z
dc.date.available2020-10-09T19:25:27Z
dc.date.copyright2020-10-03
dc.date.created2020-10-02
dc.date.issued2020-07
dc.degree.departmentDepartment of Plant Agricultureen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.degree.programmePlant Agricultureen_US
dc.description.abstractExcessive fertilizer use in greenhouse floricultural operations results in low nutrient use efficiency by plants. Here, I tested the hypothesis that calcium and magnesium use efficiencies of subirrigated pot chrysanthemums can be improved by combining moderate levels of the respective macronutrient during vegetative growth with the removal of the entire suite of nutrients at bud break, without adversely affecting plant/flower quality. Two experiments were conducted for each macronutrient in a naturally-lit research greenhouse using a split-plot design with nutrient treatment (1.68-6.75 mmol L-1 calcium or 0.38-1.5 mmol L-1 magnesium) as the main plot and cultivar as the sub-plot, and the main plots were arranged as a randomized complete block design of four blocks. Macronutrient composition of the diagnostic leaf and quality/development of the plant/inflorescence were largely unaffected by macronutrient treatments, suggesting that use efficiency improved by approximately four-fold. This modified delivery practice could contribute to low-input production of floricultural crop.en_US
dc.description.sponsorshipCanadian Agricultural Partnership
dc.description.sponsorshipCanadian Ornamental Horticulture Alliance
dc.description.sponsorshipAgMedica Bioscience Inc.
dc.identifier.citationDuncan Stephens, S., Flaherty, E. J., Sutton W. J., MacDonald W. N., and Shelp, B. J.. 2020. Further optimization of macronutrient delivery for subirrigated greenhouse-grown chrysanthemums: calcium and magnesium. Canadian Journal of Plant Science. https://doi.org/10.1139/CJPS-2020-0117
dc.identifier.urihttps://hdl.handle.net/10214/21330
dc.language.isoenen_US
dc.publisherUniversity of Guelphen_US
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectchrysanthemumen_US
dc.subjectcalciumen_US
dc.subjectmagnesiumen_US
dc.subjectplant nutritionen_US
dc.subjectsubirrigationen_US
dc.titleStudies of Calcium and Magnesium Usage by Subirrigated Pot Chrysanthemumsen_US
dc.typeThesisen_US

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