Nursery Rooms
Measurements for the nursery rooms were taken in the
early afternoon between 12:00 and 14:00 h. The weights and
ages of pigs in the different nursery rooms at different times
of the year were usually different, and the required room
temperatures varied with the age of pigs. The room
temperature varied from 18.5°C to 30.9°C. Odor concentration
was also high in winter and low in summer (fig. 3a), as
was CO2 concentration. The odor concentration ranged from
476 to 8,605 OU/m3, while CO2 concentration varied
between 685 and 7,340 ppm. The ventilation rate of the
rooms varied from 0.8 to 12.5 m3/s over the year. Odor
emission rates ranged from 7.7 to 269.2 OU m−2 s−1 and did
not show an obvious seasonal pattern (fig. 3b). As shown in
table 2, there were no significant differences between the four
nursery rooms for odor concentration and emission rate (P >
0.05), but the odor concentrations and emission rates of the
nursery rooms showed significant seasonal variations
(table 3; P < 0.05).