The influence of a prebiotic feed additive on the physiological, productive parameters and composition of the intestinal microbiome of laying hens of the Hisex Brown cross

The relevance is associated with the need to use new diets for growing highly productive modern crossbreed poultry. The purpose of the study was to determine the effect of the lactulose-containing additive “Laktuvet” (MK “Stavropolsky”) on economic and biological indicators, the physiological state and the intestinal microbiome of laying hens of the Hisex Brown cross.

Introduction. The relevance is associated with the need to use new diets for growing highly productive modern cross-breed poultry.

The purpose of the study was to determine the effect of the lactulosecontaining additive “Laktuvet” (MK “Stavropolsky”) on economic and biological indicators, the physiological state and the intestinal microbiome of laying hens of the Hisex Brown cross.

Materials and methods. At the age of 25 weeks or the 1st phase of laying, using the method of pairs of analogues, 2 groups of laying hens were formed: control and experimental, 70 heads each. Molecular genetic studies of chicken intestinal microbiota were carried out at the research and production company Biotrof LLC, St. Petersburg. At the end of the study, mathematical processing of the results was performed using statistical methods and MS Excel. Object laying hens of the Hisex Brown cross and the prebiotic feed additive “Laktuvet”.

Results with the inclusion of 0.5% of the prebiotic feed additive “Laktuvet”, an increase in the gross yield and intensity of egg laying was established by 1.84 and 1.74%, respectively, and egg weight by 1.17 g (1.86%; P≤0.001). In the intestines of chickens of the experimental group, the number of microorganisms increased by 22.9%, including a 9-fold increase in the number of bacteria of the Phylum Actinobacteria category, and a 1.4-fold increase in microorganisms of the order Ruminococcaceae, which are responsible for the digestion and absorption of fiber; 1.8 times – Lactobacillales bacteria, the most important in the group of lactic acid bacteria, belonging to the class of symbiotics, responsible for the decomposition of plant food and suppressing the growth and development of pathogenic microflora.

Conclusion. The prebiotic feed additive "Laktuvet" in the amount of 0.5% in the diet of laying hens of the Hisex Brown cross has a positive effect on their economic and biological indicators, which confirms the direct relationship between the growth of economic and biological indicators of laying hens and the microbiological composition of the intestinal microbiome.

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