Restricted feeding and linseed oil as modifiers of the fatty acid profile in pork.

摘要

This study was undertaken to evaluate the influence of restricted feeding during the growing period of fattening and linseed oil supplementation in finishing diets on the fatty acid profile of pigmeat. 32 fatteners were divided into 4 groups: 2 groups were fed semi ad libitum (A) during the growing (22-60 kg) and finishing (60-102 kg) periods of fattening and the other 2 were given a restricted (-25%) amount of feed (R) in the growing period and semi ad libitum in the finishing period. During the finishing period within each level of feeding, one group received 0 (AC and RC) and the other 4% (AO and RO) linseed oil. Pigs fed the restricted amount of feed had a more beneficial fatty acid profile in the longissimus dorsi and semimembranosus muscles. However, the differences were insignificant. The 4% linseed oil supplementation in the finishing diets caused an increase in the polyenoic fatty acid (PUFA) content, particularly of n-3.