Authors: Springer R W, Cherry N M, Muir J P, Raub R H, Wellmann K B, Jones T N
Journal: Journal of equine veterinary science
Summary
# Editorial Summary: In Vitro Digestibility of Hempseed Meal in Equine Diets Hempseed meal (HSM) represents a novel feedstuff for equine nutrition following recent legislative changes permitting its use in livestock, yet practical digestibility data specific to horses remain scarce. Researchers used an in vitro fermentation model with inoculum from four geldings to compare HSM's true digestibility and fibre degradation against conventional equine feedstuffs including alfalfa hay, Coastal Bermudagrass hay, soybean meal, rice bran pellets, and commercial concentrate over a 48-hour incubation period. Hempseed meal demonstrated neutral detergent fibre (NDF) content intermediate between alfalfa and Coastal Bermudagrass hay, with in vitro true digestibility (IVTD) significantly lower than soybean meal, rice bran, alfalfa, and commercial concentrate, but notably superior to Coastal Bermudagrass hay. These findings position HSM as a viable supplementary fibre source for equine rations, occupying a digestibility niche between quality hay and concentrates—potentially valuable where forage diversity is limited or when managing weight without sacrificing fibre intake. Farriers and nutritionists considering HSM inclusion should account for its intermediate digestibility profile and ensure adequate overall dietary quality to maintain optimal gastrointestinal function and nutrient intake.
Read the full abstract on PubMed
Practical Takeaways
- •Hempseed meal can be incorporated into equine diets as a fiber source with digestibility and nutrient profile comparable to mid-range forage options, useful for horses requiring alternative feedstuffs
- •Due to lower digestibility compared to concentrates and protein meals, hempseed meal should not be used as a primary protein source but rather as a forage extender or fiber supplement
- •Further in vivo studies and palatability testing are needed before widespread implementation in commercial equine feeding programs
Key Findings
- •Hempseed meal NDF content was intermediate between alfalfa hay and Coastal Bermudagrass hay, with values significantly greater than soybean meal and rice bran pellets
- •Hempseed meal in vitro true digestibility was greater than Coastal Bermudagrass hay but significantly lower than alfalfa hay, soybean meal, rice bran pellets, and commercial concentrate
- •Hempseed meal demonstrates nutritional characteristics positioning it as a potential fiber source rather than a protein concentrate in equine rations