Lighting Strategies for the Flowering Stage of Indoor Cannabis Production

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dc.contributor.advisorZheng, Youbin
dc.contributor.authorRodriguez Morrison, Victoria
dc.date.accessioned2021-05-12T19:30:37Z
dc.date.available2021-05-12T19:30:37Z
dc.date.copyright2021-04
dc.date.created2021-04-23
dc.date.issued2021
dc.degree.departmentSchool of Environmental Sciencesen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameMaster of Scienceen_US
dc.degree.programmeEnvironmental Sciencesen_US
dc.description.abstractThis thesis investigated the effects of light intensity (LI) and ultraviolet (UV) radiation on indoor cannabis production during the flowering stage. When plants grew under LI ranging from 120 to 1800 μmol·m–2·s–1 provided by light emitting diodes (LEDs), inflorescence yield increased linearly as LI increased up to 1800 μmol·m–2·s–1. Apical inflorescence density and terpene concentration increased linearly over the range of LIs evaluated. When plants were grown under 400 μmol·m–2·s–1 supplemented with UV (peak wavelength of 287 nm) levels from 0.01 to 0.8 μmol·m–2·s–1, for 3.5 h·d–1, there were no changes in total Δ9-tetrahydrocannabinol or total cannabidiol concentrations. The severity of UV-induced cannabis morphology and physiology symptoms worsened as UV exposure level increased. The light response models developed in this thesis can be used to determine the optimum LI for a production environment, but caution should be used when exposing cannabis to UV radiation.en_US
dc.description.sponsorshipThis work was funded by Natural Sciences and Engineering Research Council of Canada (CRDPJ 533527 �?? 18).
dc.identifier.citationRodriguez-Morrison, V., Llewellyn, D. and Zheng, Y. (2021). Cannabis yield, potency, and leaf photosynthesis respond differently to increasing light levels in an indoor environment. Front. Plant Sci. 12:646020. doi: 10.3389/fpls.2021.646020
dc.identifier.urihttps://hdl.handle.net/10214/25730
dc.language.isoenen_US
dc.publisherUniversity of Guelphen_US
dc.rightsAttribution-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nd/4.0/*
dc.subjectcannabisen_US
dc.subjectpotencyen_US
dc.subjectindooren_US
dc.subjectsole sourceen_US
dc.subjectlight emitting diodeen_US
dc.subjectultravioleten_US
dc.subjectPPFDen_US
dc.subjectlight response curveen_US
dc.subjectlight intensityen_US
dc.subjectcannabinoiden_US
dc.subjectterpeneen_US
dc.subjectsecondary metabolitesen_US
dc.titleLighting Strategies for the Flowering Stage of Indoor Cannabis Productionen_US
dc.typeThesisen_US
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