title: Short communication: Further validation of the fat sub-model in the Cornell-Penn-Miner Dairy model.
abstract: Recently, a fat sub-model was introduced into the Cornell-Penn-Miner Dairy model (CPM-Dairy; Moate et al., 2004). The principal aim of the work reported here was to validate this fat sub-model in terms of its accuracy in predicting the apparent absorption (intake - feces) of total long-chain fatty acids (LCFA) in lactating dairy cows. The fat sub-model in CPM-Dairy was used to predict the amounts (g/d) of total LCFA apparently absorbed from 63 diets described in 14 published experiments. These predicted amounts (PLCFA) were regressed against the amounts reported to be apparently absorbed (RLCFA). The regression equation was: PLCFA = - 24.8 +/- 25.2 + 1.011 x 0.029 x RLCFA; R2 = 0.95, RMSE = 55.2 g/d. The results show that for a diverse range of diets, the fat model in CPM-Dairy can accurately predict apparent absorption of dietary total LCFA.
authors.affiliation: University of Pennsylvania, Kennett Square, 19348, USA. moate@vet.upenn.edu
authors.forename: P J
authors.initials: PJ
authors.lastname: Moate
authors.forename: R C
authors.initials: RC
authors.lastname: Boston
authors.forename: I J
authors.initials: IJ
authors.lastname: Lean
authors.forename: W
authors.initials: W
authors.lastname: Chalupa
mesh_terms: D000018:Abomasum / Q000378:metabolism; D000821:Animal Feed / Q000032:analysis; D000818:Animals; D002417:Cattle / Q000378:metabolism*; D003612:Dairying; D004041:Dietary Fats / Q000008:administration & dosage / Q000378:metabolism* / Q000493:pharmacokinetics; D004063:Digestion; D004750:Enteral Nutrition; D005227:Fatty Acids / Q000008:administration & dosage / Q000378:metabolism; D008066:Lipolysis; D000455:Medicago sativa; D008954:Models, Biological; D012417:Rumen / Q000378:metabolism; D012820:Silage; D013025:Glycine max; D003313:Zea mays
chemical_list: D004041:Dietary Fats; D005227:Fatty Acids