Variability of cannabinoid yields of hemp cultivars depending on the sowing density and nitrogen fertilization

The aim of a recent study's experiments was to determine the effect of sowing density, and nitrogen fertilization on the cannabidiol (CBD) and Δ9-tetrahydrocannabinol (Δ9-THC) yields in selected cultivars of fiber hemp. A three-factor field experiment was conducted in 2014–2016. Factor A: cultivar (Futura 75, KC Dora and Tygra), factor B: sowing density (60 and 180 seeds/m2), and factor C: nitrogen fertilization (0, 30, 60, and 90 kg/ha).

The CBD yield ranged from 10.52 g/m2 in cv. Tygra to 10.99 g/m2 in cv. KC Dora. Among the examined cultivars, the highest yield of Δ9-THC in cv. KC Dora was observed. Sowing density did not modify the CBD yield, but increasing the density from 60 to 180 seeds/m2 caused an increase in the yield of Δ9-THC in cvs. KC Dora and Tygra. Nitrogen fertilization significantly influenced the yields of CBD and Δ9-THC. In both cases, yield increased until the rate of 60 kg N/ha.

Poniatowska, Joanna & Panasiewicz, Katarzyna & Szalata, Milena & Zarina, Livia & Zute, Sanita & Wielgus, Karolina. (2022). Variability of cannabinoid yields of fiber hemp cultivars depending on the sowing density and nitrogen fertilization. Plant, Soil, and Environment. 68. 10.17221/223/2022-PSE. 

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