Effects | Alfalfa | Maize silage | Control | 100 μg g− 1 | 200 μg g− 1 | 500 μg g− 1 | 1000 μg g− 1 | SEMa | |||
---|---|---|---|---|---|---|---|---|---|---|---|
Feed | nZnO | NZnO | |||||||||
Total Gas (mL) | 41.09x | 72.77y | 58.17a | 55.88a | 55.88a | 57.99a | 58.17a | 5.71 | <.0001 | 0.875 | 0.542 |
CH4 (%) | 10.69x | 9.47y | 12.68a | 11.52ab | 10.18bc | 9.26c | 6.74d | 1.44 | 0.0114 | <.0001 | 0.479 |
CO2 (%) | 48.78x | 45.55y | 56.21a | 53.46ab | 50.06b | 43.93c | 32.16d | 4.51 | 0.0314 | <.0001 | 0.948 |
H2S (ppm) | 3420x | 1314y | 3150a | 2856a | 2431b | 1936c | 1460d | 298 | <.0001 | <.0001 | <.0001 |