Associations between cannabinoids and growth stages of twelve industrial hemp cultivars grown outdoors in Atlantic Canada

Impact of Harvest Time and Pruning Technique on Total CBD Concentration and Yield of Medicinal Cannabis

“…The reduction in concentration of cannabinoids can be related to plant senescence reducing cannabinoid synthesis [ 16 ]. Plants might have a maximum cannabinoid production capacity [ 49 ], so lower concentrations on later harvest may be due to dilution effects of cannabinoid contents in relation to inflorescence biomass. The significant increase of CBD concentrations in the later HTs infers that time increases exposure of phytocannabinoids to oxidation and decarboxylation processes in the trichomes [ 50 , 51 ].…”

Cannabis sativa L.: Crop Management and Abiotic Factors That Affect Phytocannabinoid Production

“…Despite being used for phytocannabinoid production [33,57], hemp is a fieldgrown crop that traditionally has been bred selectively for fiber or seed production, rather than for flower and secondary metabolite production [55,58]. However, despite fiber and seeds being the main products, a growing interest in the valorization of hemp phytocannabinoids has appeared [55,57], which can be extracted from the leaves and the inflorescences of plants cultivated for the production of fibers and seeds, although crop development for dual purposes initially would reduce the final concentration of cannabinoids or the fiber quality [57,59].…”

“…Stack et al (2021) [110] observed the rapid accumulation of phytocannabinoids in different varieties about 3.5 weeks after the onset of flowering. Hammami et al (2021) [59] evaluated the phytocannabinoid production of 12 varieties (intended for fiber or grain production) at different stages of the reproductive phase and observed that the synthesis of these compounds varied among the genotype and during cannabis ontogenic development. The phytocannabinoid content in glandular trichomes varies with trichome age, trichome type, and trichome location on the plant [118,119].…”

Degumming methods for bast fibers—A mini review

“…The growth of the hemp plant was heavily restricted until the low-tetrahydrocannabinol variety was explored in 1998 (Wimalasiri et al, 2021). Hemp plant ranges in length from 1.0 m to 2.5 m and diameter from 7 mm to 16 mm (Hammami et al, 2021). Every part of the hemp plant has value so there is a wide application in food, medicine, textile, and composites.…”