In contrast to daily gain, the feed conversion ratio based on net energy was not significantly different between treatments.
However, the feed utilization was lower in the winter season, and although no significant interaction was found
between treatment and season, the results seem to show that the restricted treatments had a better feed utilization in the
summer time and a poorer in the winter season compared with the control-fed treatments. In accordance with previous results, the carcass quality expressed as percentage of lean meat increased in the restricted Treatments C and D compared with the 100%-concentrate Treatments A and B, and likewise the female pigs had a higher percentage of lean meat compared with castrated male pigs (Danielsen et al., 2000).