Article ID Journal Published Year Pages File Type
2454638 The Professional Animal Scientist 2007 8 Pages PDF
Abstract
Three trials were conducted to examine the effect of including specific amino acids, fatty acids, and fat sources in 20 and 22% CP and 20% fat milk replacers (MR; as-fed) fed at 454 g daily. Trial 1 measured selected blood constituents in calves fed a 20% CP, 20% fat MR including all added fat from lard and no added synthetic amino acids (CON20); a MR with added butyrate (BUT20); a MR with added coconut plus canola oil (FB20); and a MR with added L-Lys plus DL-Met (LM20). Trial 2 compared CON20, LM20, and a MR with 22% CP (CON22). Trial 3 compared CON22, a MR with 20% CP with added Lys and Met, 20% lard, coconut, and canola fat with sodium butyrate (MOD20), and pasteurized whole milk at the equal rates of DM. Compared with calves fed CON20 in Trial 1, amylase increased (P < 0.05) and urea-N decreased (P < 0.05) in calves fed BUT20; alkaline phosphatase increased (P < 0.05), creatinine tended to increase (P < 0.10), and urea-N decreased (P < 0.05) in calves fed FB20; and urea-N decreased (P < 0.05) in calves fed LM20. Calves fed LM20 in Trial 2 grew faster (P < 0.05) than calves fed CON20. In Trial 3, the calves fed MOD20 grew faster (P < 0.05) than calves fed CON22 or whole milk and had fewer abnormal fecal score days (P < 0.05) than calves fed CON22. Calves fed 20% CP MR formulated with considerations for fatty acids and amino acids grew faster than calves fed either 20% CP MR or pasteurized whole milk.
Related Topics
Life Sciences Agricultural and Biological Sciences Animal Science and Zoology
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