Summary and Implications
Carcass characteristics, meat quality indices, and tissue histology of growing pigs fed crude glycerol were determined after a 138-d feeding trial. Dietary treatments were 0, 5, and 10% crude glycerol inclusion in corn-soybean meal based diets. Diets were offered ad libitum in meal form and formulated to be equal in metabolizable energy (ME), sodium, chloride, and Lys, with other amino acids (AA) balanced on an ideal AA basis. At the end of the feeding trial, all pigs were scanned using real time ultrasound and pigs were processed at a commercial abattoir. Blood samples were collected pre-transport and at the time of harvest. Loins were removed from the carcass for meat quality, sensory evaluation, and fatty acid profile analysis. Kidney, liver, and eye tissues were collected at harvest and examined for lesions characteristic of methanol toxicity. Loin chop fatty acid profile was slightly changed by diet with the loin chops from pigs fed 10% crude glycerol having less linoleic acid and more eicosapentaenoic acid than pigs fed the 0 or 5% crude glycerol treatments. Dietary treatment did not affect blood metabolites or frequency of lesions in the examined tissues. This experiment demonstrates that pigs can be fed up to 10% crude glycerol with little to no effect on carcass composition, meat quality, or lesion scores.
Iowa State University
Lammers, Peter J.; Bregendahl, Kristjan; Lonergan, Steven M.; Ahn, Dong U.; Honeyman, Mark S.; Prusa, Kenneth J.; Kerr, Brian J.; Webber, Thomas E.; and Stoffregen, William C.
"Carcass Characteristics, Meat Quality, and Tissue Histology of Growing Pigs Fed Crude Glycerol-Supplemented Diets,"
Animal Industry Report:
AS 654, ASL R2356.
Available at: https://lib.dr.iastate.edu/ans_air/vol654/iss1/105