Table 5.
Effects of 3‐NOP dietary supplementation on methane emissions (average values over the main 15‐week experimental period, with baseline values below between brackets) in the three long‐term studies
| Study | mg 3‐NOP/kg TMR DM intake | g CH4/day | g CH4/kg DM intake | g CH4/kg EC milk | g H2/day |
|---|---|---|---|---|---|
| 1 WUR | 0 (control) | 423 (464) | 22.4 (25.0) | 17.1 (18.6) | ND |
| 54 | 332* (480) | 17.7* (25.5) | 12.9* (18.7) | ND | |
| 2 UK | 0 (control) | 449 (406) | 20.3 (16.9) | 12.3 (10.4) | 2.6 (2.7) |
| 57 | 292* (400) | 13.5* (16.7) | 8.4* (10.1) | 10.6* (2.4) | |
| 3 PSU | 0 (control) | 410 (369) | 16.7 (15.0) | 11.2 (10.0) | 0.5 (0.5) |
| 61 | 308* (403) | 12.1* (14.9) | 8.2* (9.7) | 2.6* (0.4) |
3‐NOP: 3‐nitrooxypropanol; DM: dry matter; TMR: total mixed ration; EC: energy corrected.
*
Significantly different from the control value at p < 0.01.