Table 4.
Experiment 1: effect of BSS and eCAN1 on enteric CH4 production of beef steers
| Treatment2 | P-value3 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Item4 | NCTRL | U | NIT | UB | NITB | SEM | NPN | NS | B | B × N |
| CH4 emissions, g/d | 121.16 | 117.27 | 115.57 | 134.09 | 100.04 | 10.986 | 0.673 | 0.039 | 0.951 | 0.121 |
| CH4 emissions, g/kg OMI | 15.35 | 15.42 | 16.44 | 15.59 | 13.67 | 1.197 | 0.954 | 0.689 | 0.264 | 0.209 |
| CH4 emissions, g/kg OMD | 28.72 | 28.63 | 30.33 | 29.36 | 25.70 | 2.246 | 0.921 | 0.649 | 0.372 | 0.222 |
| CH4 emissions, g/kg MBW | 1.51 | 1.39 | 1.44 | 1.55 | 1.18 | 0.126 | 0.341 | 0.051 | 0.689 | 0.063 |
2eCAN = 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 10 (NCTRL), 8 (U, UB) and 7 (NIT, 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 eCAN.
4CH4 was determined from the average of at least 3 out of 5 24 hr periods of breath sample collection. OM, OM intake; OMD, OM digested; MBW, BW0.75.