The lowest value was 10.2 OU m−2 s−1 in June and September,
and odor emission rate peaked in October and January at
57.6 OU m−2 s−1. Statistical analysis indicated that there were
no significant differences between the two rooms for odor
concentration and emission rate (table 2; P > 0.05). Table 3
indicates that odor concentrations and emissions of the farrowing
rooms were significantly different throughout the
year (P < 0.05).