THE INFLUENCE OF FEEDING RAPESEED ON GROWTH AND CARCASS FAT QUALITY OF PIGS

In three experiments with growing - finishing pigs, the influence of g raded rapeseed levels in the mixed feed on growth, carcass quality and the composition of the body fat was studied. The feed mixtures were f ormulated isocaloric and isonitrogenous. With increasing rapeseed leve ls, the daily live weight gains decreased and the content of polyunsat urated fatty acids (PUFA) in the body fat increased. By an additional hydrothermal treatment of the rapeseed, the growth depressions were av oided. With a shortened feeding time of rapeseed, the PUFA content of the backfat was reduced. Considering the restriction for the PUFA cont ent in the backfat, which was fixed at 15%, a level of 10% rapeseed in the feed mixtures should not be exceeded.