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Bioavailability Of Ruminally Or Abomasally Infused L-Carnitine In Holstein Heifers, K. Olagaray, C. Armendariz, A. Bellamine, S. Jacobs, E. Titgemeyer, B. Bradford
Bioavailability Of Ruminally Or Abomasally Infused L-Carnitine In Holstein Heifers, K. Olagaray, C. Armendariz, A. Bellamine, S. Jacobs, E. Titgemeyer, B. Bradford
Kansas Agricultural Experiment Station Research Reports
This study evaluated the relative bioavailability of carnitine delivered by different methods in dairy cattle. Four Holstein heifers were used in a split-plot design to compare ruminally or abomasally infused L-carnitine. The study included 2 main-plot periods, with infusion routes allocated in a crossover design. Within main-plot periods, each of 3 subplot periods consisted of 4-d infusions separated with 4-d rest periods. Subplot treatments were infusion of 1, 3, and 6 g L-carnitine daily. Doses were increased within a period to minimize carryover. Treatments were delivered in two 10-h infusions daily. Blood was collected before the start of infusions and …
Bioavailability Of Rumen-Protected Carnitine In Lactating Dairy Cows, K. Olagaray, J. Shaffer, C. Armendariz, A. Bellamine, S. Jacobs, E. Titgemeyer, B. Bradford
Bioavailability Of Rumen-Protected Carnitine In Lactating Dairy Cows, K. Olagaray, J. Shaffer, C. Armendariz, A. Bellamine, S. Jacobs, E. Titgemeyer, B. Bradford
Kansas Agricultural Experiment Station Research Reports
For this study, 56 lactating Holstein cows (143 ± 72 days in milk) were used in a randomized complete block design to evaluate 2 rumen-protected products compared to crystalline carnitine. Treatments were a) control, b) 3 grams/day crystalline L-carnitine (raw), c) 6 grams/day raw, d) 5 grams/day 40COAT (40% coating, 60% L-carnitine), e) 10 grams/day 40COAT, f) 7.5 grams/day 60COAT (60% coating, 40% L-carnitine), and g) 15 grams/day 60COAT. Treatments were top-dressed to diets twice daily. The 14-day experiment included a 6-day baseline-measurement period with the final 2 days used for data and sample collection and an 8-day treatment period …