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related 3.91 — strongly supporting 14 facts
Industrial hemp is a crop specifically cultivated to produce grain, which is used for food, feed, and oil {fact:1, fact:2}. The production of this grain is a primary objective in industrial hemp farming, often managed through specific harvesting techniques, sowing densities, and maturity requirements {fact:3, fact:10, fact:12, fact:14}.
Facts (14)
Sources
A critical review of industrial fiber hemp anatomy, agronomic ... bioresources.cnr.ncsu.edu 12 facts
claimPhosphorus fertilization affects industrial hemp plant height, tensile strength, and elasticity of bast fibers, but does not affect grain, stem, or biomass yield.
claimThe optimal period to harvest industrial hemp for bast fiber is before the grains are completely mature, which is typically 70 to 90 days after sowing.
claimMonoecious cultivars of industrial hemp are used in dual-purpose production, allowing growers to produce both grain (seed used for food) and fiber.
claimWaiting longer than full maturity or 70% grain ripeness to harvest industrial hemp causes yield losses due to reduced moisture and nutrient concentrations.
claimIndustrial hemp grown for grain requires a warmer climate and longer growing seasons compared to hemp grown for fiber.
claimWhen growing industrial hemp for high grain or cannabinoid yields, the crop should be harvested at full maturity or when 70% of the grains are ripe.
claimLater planting of industrial hemp may reduce stem length and mass, negatively impacting grain and fiber production.
claimTo obtain high-quality bast fiber from industrial hemp, the plant should be harvested before grain and cannabinoids begin to develop.
procedureGrain and dual-purpose industrial hemp varieties are harvested using axial flow combine harvesters, which cut the hemp and separate the grain from the stalks.
measurementIndustrial hemp grown for grain and cannabinoid yield typically utilizes the lowest sowing densities, ranging between 10 and 20 kg/ha, according to Burczyk et al. (2009).
measurementIndustrial hemp yields of stem, grain, and inflorescence combined are optimized by a density of 120 plants per square meter with 0.5 meter interrow spacing, according to Krüger et al. (2022) and Zheljazkov et al. (2023).
claimSecondary macronutrients and micronutrients such as magnesium and calcium have slight effects on industrial hemp plant growth but no direct effect on grain and bast fiber yield, with the exception of boron and copper.