No diet effect was observed for CH
4
or NMTHC
(Table 8). The CH
4
emissions were greater during the
finish phases (Phases 3 through 5) than grower phases
(Phases 1 and 2). The NMTHC emissions showed a dif-
ferent trend from CH
4
in that highest emissions (g · d
–1
· AU
–1
) were observed during Phase 1. Our results dis-
agree with those of Li et al. (2011) who observed increasing NMTHC emissions as pigs matured. The interactions
between phase and treatment for concentration and emissions were not significant for either CH
4
or NMTHC.