EFFECT OF DIFFERING NUTRITION BY LACTATING SOWS OF MILK-COMPOSITION, WEIGHT-LOSS DURING LACTATION AND REPRODUCTION PERFORMANCE

Supplementing the diets of lactating sows with oil makes the milk fat increasing, while the lactose decreases and the milk protein do not change. An improvement of the number of weaned piglets is not proved. The weightloss of the lactating sows were evidently decreased by the supplement of oil. In the second group the sows weaned the less piglets, although they were energetically oversupplied (wheat maize diet). The number of losses of burned piglets is to explain only partially by the changes of the composition of the beast milk and the milk of these sows. The group which received a protein supplement weaned the most piglets. The content of protein of these sow milks 7 days p.p. (adjusted by the number of suckling piglets) is significantly higher as the content of protein in the sow milks of the other groups. The content of fat and energy of those milk does not differ from the values of the other groups.