Author
LAKE, SCOTT - UNIVERSITY OF WYOMING | |
Scholljegerdes, Eric | |
NAYIGIHUGU, VENERAND - UNIVERSITY OF WYOMING | |
ATKINSON, REBECCA - UNIVERSITY OF WYOMING | |
MOSS, GARY - UNIVERSITY OF WYOMING | |
VAN KIRK, EDWARD - UNIVERSITY OF WYOMING | |
HALLFORD, DENNIS - NEW MEXICO STATE UNIVERSI | |
RULE, DANIEL - UNIVERSITY OF WYOMING | |
HESS, BRET - UNIVERSITY OF WYOMING |
Submitted to: American Society of Animal Science Annual Meeting
Publication Type: Abstract Only Publication Acceptance Date: 2/2/2005 Publication Date: 7/24/2005 Citation: Lake, S.L., Scholljegerdes, E.J., Nayigihugu, V., Atkinson, R.L., Moss, G.E., Van Kirk, E.A., Hallford, D.M., Rule, D.C., Hess, B.W. 2005. Performance and serum glucose, insulin, igf-1, and nefa concentrations of calves nursing beef cows consuming high-linoleate or high-oleate safflower seed supplements. American Society of Animal Science Annual Meeting. Vol. 85:54 Interpretive Summary: Technical Abstract: Three-year-old Angus ' Gelbvieh beef cows nutritionally managed to achieve a BCS of 4 or 6 at parturition were used in a 2-yr experiment (n = 36/yr) to determine the effects of dietary lipid supplementation on suckling calf ADG and calf serum concentrations of glucose, insulin, IGF-1, and NEFA. Beginning 3 d postpartum, cows within each BCS were randomly assigned to be fed hay and a low-fat control supplement or supplements with either high-linoleate cracked safflower seeds or high-oleate cracked safflower seeds until d 60 of lactation. Rations were formulated to be isonitrogenous and isocaloric, and safflower seed diets contained 5% DMI as fat. Calf BW and blood samples were taken immediately prior to suckling and 2 h postprandial on d 30 and 60 of lactation. Maternal BCS at parturition did not influence calf ADG (P = 0.48), serum glucose (P = 0.16), insulin (P = 0.35), IGF-1 (P = 0.81), or NEFA (P = 0.92) concentrations. Maternal postpartum dietary treatment did not affect calf ADG (P = 0.81), serum insulin (P = 0.78), IGF-1 (P = 0.92), or NEFA (P = 0.86); however; serum glucose concentrations were greater (P < 0.01) in calves from lipid-supplemented cows. Day of lactation did not affect calf serum glucose (P = 0.73) or insulin (P = 0.34) concentrations; however, serum IGF-1 concentrations were greater (P < 0.01) at d 60 compared with d 30, whereas serum NEFA was greater (P = 0.01) at d 30. Calf serum NEFA (P < 0.01) and glucose (P < 0.01) concentrations were greater preprandial than postprandial; however, serum insulin was greater (P < 0.01) postprandial. Although calves nursing cows supplemented with lipid appeared to be less sensitive to insulin, calf ADG was not affected by altering cow diet. |