This invention relates to the field of
animal nutrition and feed, and discloses a pig feed for improving slaughter performance, as well as its preparation and feeding method. The preparation method includes: using safflower seeds as
raw material, adding rosemary
ethanol extract, and then subjecting it to
solid-state
fermentation with
Bacillus subtilis to prepare fermented
safflower seed powder with a high proportion of C-9,T-11
conjugated linoleic acid; adding the fermented
safflower seed powder, oat β-
glucan, and selenomethionine-type
selenium-enriched
yeast to the basal diet of fattening pigs to formulate a compound feed; and feeding the feed continuously from the time the fattening pigs reach a weight of 60 kg until slaughter. This invention selectively inhibits the secondary catalytic conversion of C-9,T-11
conjugated linoleic acid through
rosmarinic acid, preserving the proportion of active configurations in the
fermentation product; and extends the effective utilization time window of
conjugated linoleic acid in the fattening pig through oat β-
glucan; thus achieving a comprehensive improvement in slaughter performance, including reduced backfat thickness, increased
intramuscular fat content, and improved carcass grade.