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The effect of new biological preservative representing the mix of liophylized lactobacteria strains Lactobacillus plantarum VKPM V-4173; Lactococcus lactis subsp. lactis VKPM V-2092, and Propionibacterium acidipropionici VKPMV-5723 (at a ratio of 40:40:20) on the quality of a maize silage has been studied. The total bacteria content in the preparation was 1´10 11 CFU/g. Different variants of a silage conservation have been accesses under laboratory conditions using laboratory vessels; the variants included a preservative-free (control) variant and the dosages of 1.0, 2.0, and 3.0 g per a ton of conserved maize green mass. The evaluation of the dynamical changes in the ammonia content, pH, organic acid content and their ratio, and the analysis of the chemical composition of a silage performed at the 7 th , 21 st , and 60 th days after the filling showed the dosage of 3.0 g/ton provided the best results. An industrial testing of the studied preservative (3.0 g/ton) showed that, comparing to the preservative-free silage, the use of the new preservative during the filling of a maize sillage provided the better preservation of nutrients and more optimal pH and ratio of organic acids in the silage mass. The industrial evaluation of the effect of the preservative addition to the silage on the productivity of milk cattle ( n = 12) showed that the maximum average daily yield of milk of the basis fat content was obtained from cows of the experimental group, which ration included maize silage prepared with the use of the studied preservative. This yield made 28.86 kg that exceeds the same value of the control group by 4.0%. The feeding of cows with the silage prepared with the use of the new preservative provided an increase of the volatile fatty acid content and bacteria amount in the rumen contents and simultaneously decreased the ammonia content that evidenced the improvement of the digestion processes. The digestibility of nutrients of the whole ration of cows from the experimental group was higher than that in the control group.

ПОВЫШЕНИЕ КАЧЕСТВА КОРМОВ И МОЛОЧНОЙ ПРОДУКТИВНОСТИ КОРОВ ПРИ ИСПОЛЬЗОВАНИИ НОВОГО БИОЛОГИЧЕСКОГО КОНСЕРВАНТА В ЛИОФИЛИЗИРОВАННОЙ ФОРМЕ