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Table 6 Ultrasound measurement, carcass composition and meat quality of steers received different doses of vitamin A treatments at birth

From: Vitamin A administration at birth promotes calf growth and intramuscular fat development in Angus beef cattle

Response 0 IU (n = 9) 150,000 IU (n = 7) 300,000 IU (n = 9) SE P-value
Ultrasound at transition to the finishing stage
 IMF, % 3.95b 4.93a 4.34ab 0.26 0.036
 Rib fat, cm 0.38 0.38 0.41 0.03 0.659
 Rump fat, cm 0.53 0.53 0.43 0.05 0.240
 REA, cm2 53.5 56.1 58.3 2.21 0.337
Carcass characteristics
 Carcass weight, kg 341.0 357.0 349.5 3.87 0.527
 Dressing percent, % 59.5 59.1 59.8 0.29 0.468
 Marbling score* 583.3b 671.7a 610.0ab 20.20 0.016
 KPH, % 2.34 2.18 2.15 0.14 0.661
 REA, cm2 82.2 85.6 84.2 3.87 0.565
 Back fat, cm 1.29 1.46 1.27 0.06 0.421
 Yield grade 3.02 3.16 2.96 0.09 0.921
Meat quality
 Cooking loss, % 20.3 20.6 21.5 1.28 0.793
 SSF, kg 8.45 10.27 9.66 1.12 0.637
Meat composition
 CP% 23.4 23.3 23.9 0.38 0.438
 IMF% 6.33 7.49 6.94 0.69 0.572
  1. *500 = small 0; 600 = modest 0; 700 = moderate 0
  2. a-bMeans in the same row with different letters differ significantly (P < 0.05)