| Summary: | Feeding lactating sows with the probiotic supplements “Citexflor-1” and “Sgol-1-40” at 14.4–13.1 MJ of exchange energy released from digesting 1 kg of dry matter of feed mixtures included in the diet had a positive effect on productivity, nutrient digestibility and morphological and biochemical parameters of blood. The inclusion of adequate amounts of “Citexflor-1” enhanced milk production by sows in the second trial group compared to the control by 2.03 %, in the third by 6.6 % and in the fourth by 3.9 %, with the survival in piglets observed at 89–92 %. Supplementation of probiotic preparation “Sgol-1-40” was carried out, the sows showed to produce more milk by 5.8 % in the second trial group, 16.3 % in the third, and 20.7 % in the fourth group compared to the control. In the study of morphological and biochemical parameters of blood in sows in the first experiment, the erythrocyte number was greater in the third trial group by 6.2 %, and in the fourth by 4.7 %. In the second experiment, with probiotic supplementation of “Sgol-1-40” fed to sows, the number of red blood cells was 4.2; 18.1 and 32.1 % greater, respectively, along with hemoglobin level higher at 2.8; 15.3; 24.1 %, respectively.
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