ESTABLISHMENT OF CARINATA MEAL AS A PROTEIN SUPPLEMENT FOR BEEF CATTLE.
Leao Guidotti, Elisabeth 1982-
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The objective of this research was to evaluate the value of carinata meal (CRM) relative to canola meal (CM) when fed alone or in combination with wheat-dried distillers grains with solubles (WDDGS) on the performance of growing and finishing beef steers and rumen fermentation, total tract nutrient utilization, omasal flow and N efficiency of growing beef heifers. The first trial involved a 97-d backgrounding (BK) trial that used 360 calves (321.8 ± 0.10kg) assigned to one of 12 pens. Diets compared CRM relative to CM at two dietary inclusion levels (7.5 and 15% DM basis). The second trial was a finishing trial using 250 crossbred steers (418.7 ± 0.48 kg) assigned to 25 pens with five treatments: CRM (4.8% DM), CM (6% DM), WDDGS (6.2% DM), and CRM (2.7% DM) + WDDGS (2.7% DM) or CM (3% DM) + WDDGS (3% DM). Trial three designed as a Latin square, used 4 rumen-cannulated heifers (385.8 ± 27.95 kg) that were fed a barley-based BK diet supplemented with CRM (9.24% DM); CM (9.97% DM); CRM (4.98% DM) + WDDGS (5.03% DM) or CM (4.98% DM) + WDDGS (5.03% DM). In Trial 1 and 2, there were no differences (P > 0.05) between treatments for final shrunk BW or ADG, DMI and G:F. In trial 2, cattle fed CM had heavier hot carcass weights and a greater dressing percentage (DP) than those fed CRM diets. In Trial 3, apparent digestion of N tended (P = 0.09) to be greater for CRM and CM diets relative to WDDGS diets. The inclusion of WDDGS increased (P = 0.04) N truly digested in the rumen, and decreased ruminal non- ammonia nitrogen (NAN) flow. No treatment differences (P > 0.05) were noted in total bacterial NAN flow or in microbial efficiency. Carinata meal is equal to CM as a protein source for beef cattle without affecting performance, rumen fermentation, total tract nutrient utilization, and N efficiency. However, HCW and DP were greater in cattle fed CM relative to those fed CRM. There was no benefit to adding WDDGS as a rumen undegradable protein source.
DegreeMaster of Science (M.Sc.)
DepartmentAnimal and Poultry Science
SupervisorMcKinnon, John J
CommitteePenner , Gregory B; Christensen, David A; Yu, Peiqiang; Buchanan, Fiona C; Erickson, Nathan
Copyright DateJune 2018
carinata meal, canola meal, wheat-dried distillers’grains with solubles, feedlot, performance, carcass characteristics, rumen fermentation, omasal flow, microbial protein synthesis, digestibility