Light and timing shape hemp's nutrition and cannabinoid content for livestock

Researchers investigated how light conditions and harvest timing affect the nutritional value and cannabinoid profiles of industrial hemp varieties grown in California. Using a new analytical method called UPLC-DAD, scientists studied five different hemp varieties—some sensitive to light cycles and others insensitive—under varying light intensities and harvested at different growth stages. The study revealed that light intensity, plant genetics, and harvest time significantly influence both the nutritional quality of hemp and its cannabinoid expression, with implications for using hemp safely as animal feed.

The key findings suggest that higher light intensity boosted the nutritional value of hemp plants, though different varieties responded differently. Plants sensitive to photoperiod (day length) showed notably higher cannabinoid levels when grown under intense light, while later harvests consistently produced the highest cannabinoid concentrations across all varieties. This discovery is particularly important because it demonstrates farmers can optimize hemp's nutritional profile for livestock feed while managing cannabinoid safety concerns through strategic selection of plant genotypes and careful timing of harvest.

The research highlights an innovative approach to agricultural production: by matching specific hemp varieties to their ideal growing conditions, producers can fine-tune both nutritional value and chemical composition to meet different agricultural needs. This precision-agriculture strategy could expand hemp's practical applications in sustainable livestock feeding while simultaneously addressing regulatory concerns about cannabinoid levels in animal feed sources.