Single lots of industrial hemp plants and by-products of cannabinoid production were obtained from a licensed research station located in south-central Kansas. Samples obtained were (1) whole industrial hemp plants (no roots), (2) stalks remaining after seed harvesting, (3) unprocessed female flowers intended for cannabinoid extraction, (4) whole seed heads for seed production, (5) leaves obtained from the drying process, (6) chaff obtained after seed harvesting and cleaning, and (7) processed female flowers after cannabinoid extraction. Plant materials were submitted for nutrient concentration and digestibility analysis, and for cannabinoid concentration determination, to a commercial nutrition laboratory.
The cultivation and production of industrial hemp [Cannabis sativa containing <0.3% tetrahydrocannabinol (THC)] has increased. Information regarding the nutrient composition and cannabinoid concentration of different plant parts are deficient.
Dry matter of the plant material ranged from 65 to 96.6%. Crude protein ranged from 5.3 to 24.5%. Calcium concentration was from 1.0 to 5.7% DM. The plants tested had high fiber concentrations, with NDF ranging from 28 to 80% and ADF ranging from 18 to 65% DM. Total digestible nutrients was 19.8 to 61.5. Six of the 10 cannabinoids tested were detected in all samples. Cannabidiolic acid, cannabidiol, and Δ9-tetrahydrocannabinolic acid A were detected in all samples at the highest concentrations.
Results and Discussion
These findings will assist livestock producers in using industrial hemp in animal feeds through consideration of both the nutritional and cannabinoid concentrations in the ration.
With the exception of consciously choosing to reproduce plants through pollination (as opposed to cloning a female plant), growers must carefully keep male plants away from female plants.
Male plants will produce pollen sacs that at first look like little tiny balls and then grow into larger clusters of oblong-shaped sacs. Conversely, a female weed plant will produce pistils, which in their early stages look like thin hairs and then eventually start growing into more structured ovules and stigmas.
Each part of the cannabis plant serves a purpose.
How to tell male from female marijuana plants
There is one very important reason why it’s crucial to be able to distinguish male from female plants: Only female plants produce flowers. Because male plants produce pollen sacs, they do not generate any of the buds that people actually harvest and consume. From the perspective of growing weed for human consumption, male plants are really only good for propagating brand new baby plants from seed.
The main support structure of the marijuana plant, the stem transports fluids, nutrients, and information from the roots to the rest of the weed plant. The stem provides a foundation to give fan leaves access to the light they need to facilitate growth and carries the weight of heavy colas.
There is often a lot of confusion surrounding pistils and stigmas, with many people confusing one of the other. Here’s a quick breakdown on the difference between the two important cannabis plant components.
The main part of the flower, at the end of a female plant’s stem is composed of many small floral clusters. In general, the bigger, heavier, and more densely covered in trichomes a cola is, the better quality it will be, although some cultivars will naturally grow flowers that are more loosely structured and airy.