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Horticultural Management and Environment Control Strategies for Cannabis (Cannabis sativa L.) Cultivation

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Title: Horticultural Management and Environment Control Strategies for Cannabis (Cannabis sativa L.) Cultivation
Author: Hoogenboom, Jennifer
Department: School of Environmental Sciences
Program: Environmental Sciences
Advisor: Dixon, MikeGraham, Thomas
Abstract: The objective of this project was to establish horticultural management recommendations for each growth stage of cannabis with respect to growing medium, light quality and flux, temperature, and CO₂ supplementation. A peat-based potting mix produced longer roots compared to peat plugs; however, rockwool media resulted in 97% rooting success. There was no effect of light quality on root dry mass; however, the cuttings under red light exhibited significantly more and longer roots. Low light acclimated plants exhibited contrasting Net Carbon Exchange Rate (NCER) responses to 15 light spectral qualities; no differences in NCER were observed between 15-32°C. NCER responses to light and CO₂ concentration indicated optimal light intensity of 410-960 µmol m⁻²·s⁻¹ and ~1600 ppm CO₂ for stock, 21 DAP vegetative and 35 DAP flowering plants. Plants in a peat-based mixture with slow-release fertilizer exhibited higher floral yield than organic mixtures.
Date: 2022-01
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