Table 9.
Effect of Ractopamine on quantitative carcass data of feedlot beef cattle
| Treatment1 | ||||
|---|---|---|---|---|
| Item | CON | RAC | SEM | P-value |
| HCW, kg | 367.21 | 379.73 | 6.58 | 0.006 |
| DP, % | 54.82 | 55.88 | 0.16 | 0.004 |
| USDA YG | 2.86 | 2.64 | 0.05 | 0.035 |
| Fat Thickness, cm | 1.42 | 0.51 | 0.01 | 0.057 |
| REA, cm2 | 89.74 | 93.87 | 1.68 | 0.100 |
| KPH, % | 1.70 | 1.67 | 0.07 | 0.717 |
| Skeletal Maturity2 | 151.65 | 146.42 | 1.02 | 0.011 |
| Lean Maturity2 | 142.94 | 145.96 | 1.37 | 0.170 |
| Overall Maturity2 | 147.29 | 146.19 | 1.03 | 0.480 |
| Marbling Score3 | 560.07 | 524.04 | 11.00 | 0.060 |
1Treatments: CON = finishing ration containing no RAC (Control); RAC = finishing ration containing 27.3 g/907 kg RAC DM basis (Ractopamine).
2The following are skeletal, lean, and overall maturity description with corresponding numerical scores: E = 500–599; D = 400–499; C = 300–399; B = 200–299; A = 100–199.
3The following are marbling descriptions with corresponding numerical scores: Very abundant (VAB) = 1000–1099; Abundant (AB) = 900–999; Moderately abundant (MAB) = 800–899; Slightly abundant (SLAB) = 700–799; Moderate (MD) = 600–699; Modest (MT) = 500–599; Small (SM) = 400–499; Slight (SL) = 300–399; Traces (TR) = 200–299; Practically devoid (PD) = 100–199.