|Cappellozza, Bruno - Oregon State University|
|Cooke, Reinaldo - Oregon State University|
|Trevisanuto, Cesar - Oregon State University|
|Tabacow, Victor - Oregon State University|
|Bohnert, David - Oregon State University|
|Dailey, Jeffery - Jeff|
|Carroll, Jeffery - Jeff Carroll|
Submitted to: Journal of Animal Science
Publication Type: Abstract Only
Publication Acceptance Date: 3/15/2011
Publication Date: 8/11/2011
Citation: Cappellozza, B.I., Cooke, R.F., Trevisanuto, C., Tabacow, V.D., Bohnert, D.W., Dailey, J.W., Carroll, J.A. 2011. Camelina meal supplementation to beef cattle: III. Effects on acute-phase and thyroid responses [abstract]. Journal of Animal Science. 89:199(E-Suppl2).
Technical Abstract: Sixty Angus x Hereford steers were ranked by BW on d -28 of the study and allocated to 20 drylot pens, which were randomly assigned to receive: 1) supplement containing (as-fed basis) 84% corn, 14% soybean meal, and 2% mineral mix (CO) offered during preconditioning (PC; d -28 to 0) and feedlot receiving (FR; d 1 to 29), 2) supplement containing (as-fed basis) 70% corn, 28% camelina meal, and 2% mineral mix (CAM) offered during PC and FR, 3) CAM offered during PC and CO offered during FR, 4) CO offered during PC and CAM offered during FR. Treatments were offered daily at a rate of 2.20 and 2.04 kg of DM/steer for CO and CAM, respectively. Alfalfa-grass hay was offered ad libitum during the study. On d 0, steers were loaded into a commercial livestock trailer, transported for 24 h, and returned to the research facility (d 1). Total DMI was evaluated daily, and shrunk BW was collected on d -31, 1, and 30 for ADG calculation. Blood samples were collected on d 0 (prior to loading), 1 (immediately upon arrival), 4, 7, 10, 14, 21, and 29 for determination of plasma cortisol and haptoglobin. Rectal temperatures were recorded concurrently with blood sampling on d 0, 1, 4, and 7. During PC, CAM steers tended to have reduced (P = 0.10) ADG compared to CO (0.26 vs. 0.37 kg/d, respectively). No treatment effects were detected (P > 0.16) for FR and total ADG. Steers receiving CAM during PC had reduced total DMI during PC and FR compared to CO cohorts (3.07 vs. 3.35% of BW during PC, and 3.20 vs. 3.35% of BW during FR, respectively). Steers receiving CAM during PC had reduced mean haptoglobin concentrations vs. CO cohorts on d 0 and 1 (1.64 vs. 1.79 absorbance at 450 nm × 100, respectively). Steers receiving CAM during FR had reduced (P = 0.02) mean haptoglobin and rectal temperatures during FR compared to CO cohorts (1.69 vs. 2.02 absorbance at 450 nm × 100 of haptoglobin, and 39.05 vs. 39.14 deg C for temperature, respectively). In conclusion, camelina meal supplementation alleviated the acute-phase protein response stimulated by transport, but did not benefit performance of feeder steers.