COMPARATIVE BIOLOGICAL CHARACTERISTICS OF SOUR-MILK FEEDING ADDTITIVE OF DIFFERENT TYPES FOR BROILERS POULTRY FARMING

The article explores biological characteristics of sour-milk feeding additive of different types for broilers farming. The researchers conducted chemical analysis of sour-milk feeding additive and selected tests of quantity-built product (200 g). The research was carried out in Siberian Research Institute of Animal Husbandry. The experiment on enzyme activity of sour-milk feeding additive on the basis of different bacteria was carried out in the central microbiological laboratory of Sibbiofarm factory in 4 stages. The researchers selected the samples of milk-sour feeding additive on the basis of single microorganisms SMFA-B, SMFA-S, SMFA-P, SMFA-L. The chemical analysis of sour-milk feeding additives on the basis of single microorganisms (L, B, P and S) and symbiotics (LS and LBPS) has shown that equal moisture of sour-milk feeding additives contributes to equal concentration of protein – 2.78–3.0%. Sour-milk feeding additiveB contains the highest concentration of fat– 0.32%, therefore bifidobacteria contributes significantly to fat concentration as this indicator of single microorganisms varies from 0.14 to 0.18%; SMFA – LBPS – 0.20%. The concentration of ash in the investigated sour-milk feeding additives is the same – 0.73–0.77%. Sour-milk feeding additives on the basis single microorganisms have equal level of nitrogen-free extractive substances – 5.38–5.62%, the concentration of nitrogen-free extractive substances in SMFA-LS and SMFA-LBPS is higher and it is 6.00–6.34%. The concentration of Calcium and phosphorus in all the investigated sour-milk feeding additives is totally the same; Calcium – 0.12–0.14 and Phosphorus – 0.08%. The concentration of aminoacids in SMFA-B, except alanine and arginine, is higher. The research on sour-milk feeding additives on the basis of different microorganisms-probiotics has shown that all investigated SMFA contain one or several enzyme groups. SMFA-B has shown all the investigated groups of enzymes. SMFA-P contains 3 groups of enzymes: amiolytic, proteolytic and cellulolytic. The amilolytic group is slightly revealed. SMFA-S contains 2 groups of enzymes: proteolytic and cellulolytic whereas amilolytic and lipolytic activities are slightly revealed. Sour-milk feeding additive on the basis of Bifidobacter bifidum longum, Streptococcus termophilus, Propionobacterium acidi-propionicum and Lactobacillus acidophilus is characterized by high protein, enzyme, aminoacid, vitamin and macroelement properties. Sour-milk feeding additive on the basis of Bifidobacter bifidum longum has the most valuable biologically active properties. High biological value of sour-milk feeding additives outlines the possibility of their application in poultry farming as an alternative to antibiotics.

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