Table 6.
Experiment 2: effect of BSS and eCAN1 on carcass ultrasound measurements
| Treatment2 | P-value3 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Item4 | NCTRL | U | NIT | UB | NITB | SEM | NPN | NS | B | B × N |
| LM area, cm2 | 54.36 | 56.54 | 54.41 | 58.07 | 56.79 | 2.677 | 0.441 | 0.493 | 0.431 | 0.871 |
| LM area change7, cm2 | 10.26 | 12.33 | 11.38 | 15.12 | 12.32 | 2.221 | 0.298 | 0.395 | 0.397 | 0.671 |
| 12th-–rib fat thickness, cm | 0.50 | 0.42 | 0.47 | 0.56 | 0.40 | 0.025 | 0.204 | 0.012 | 0.080 | <0.001 |
| 12th-rib fat thickness change8, cm | 0.063 | -0.025 | 0.025 | 0.117 | -0.045 | 0.019 | 0.042 | 0.009 | 0.069 | <0.001 |
1eCAN = encapsulated calcium-ammonium nitrate (5Ca(NO3)2–NH4NO3) – 65.1% nitrate DM basis.
2NCTRL, treatment 2.7 g/kg BW molasses; U, NCTRL + 182 mg/kg BW urea; NIT, NCTRL + 538 mg/kg BW eCAN; UB, treatment U + 58.4 mg/kg BW BSS; NITB, treatment NIT + 58.4 mg/kg BW BSS. Groups contained 5 (NCTRL, U, NIT, UB) and 4 (NITB) experimental units. Largest SEM is provided.
3Observed significance levels for: NPN, effect of NPN, NCTRL vs. the mean of U + NIT + UB + NITB; NS, effect of NPN source (excludes NCTRL); B, effect of BSS (excludes NCTRL); B × N, interaction of BSS and NPN source (excludes NCTRL).
4LM area and 12th-rib fat thickness was measured on day 56 using day −28 as a covariate. Difference in LM area and 12th-rib fat thickness measured between days −28 and 56.