Breeding method for breeding sow and feed for breeding pig

摘要

Fatty acid of 12 to 24 carbon atoms having a melting point of -60 to 40 degrees centigrade and having a double bond of 2 to 6 in the molecule and having a double bond of 2 to 6 in the molecule, a breeding BitB that contains at least one lipid selected from the triglyceride containing the fatty acid and the metal salt of the fatty acid There are disclosed breeding methods for TA and breeding sows for use in the proportion of 0.5 to 10% by weight of the lipids. According to the breeding method of breeding sows of the present invention, the breeding performance of pigs can be improved by further increase in the number of production, increase in the number of weaned heads, shortening of estrus recursion days, and increase in annual average delivery frequency.