Probiotics in broiler poultry farming.

The increased requirements for the quality and safety of agricultural products have served as the basis for studying the use of probiotics in broiler poultry. In this connection, research on the replacement of antibiotics with safe drugs for human and animal health, development of technologies for obtaining safe products is a priority.

Probiotics and products derived from them can be one of the alternative solutions to this problem. In this case, as shown by multiple studies, it is possible to grow broiler chickens and without antibiotics, under certain conditions, probiotics become a substitute for them.

However, despite the widespread introduction of prohibitions on the use of fodder antibiotics, it is still difficult enough to break the stereotype of thinking that it is impossible to grow a bird without antibiotics. The main priority in the production of poultry products is still profit, not quality and safety of products. Feeding specialists make diets for poultry feeding, as recommended by the cross-country suppliers, and at their discretion, without considering many factors. With outdoor maintenance, the bird has the opportunity to feed on the missing products from the litter, which is inaccessible to the bird in the cage.

Thus, studies were conducted to determine and justify the need for poultry in feed additives containing microorganisms when broiler chickens are grown.

To achieve this goal, the following research objectives were formulated:

1. To determine the influence of probiotic feed additives on the timing of formation and quality of the microbial landscape of broiler chickens.
2. Determine the dependence of the level of consumption by broiler chickens of various monocultures of probiotics on the presence of enzymes in their composition.
3. To determine the relationship between the shifts in the qualitative composition of the intestinal microflora and the immunological resistance of the organism of broiler chickens.

When growing broilers of the ISA cross, two groups of 38 chickens-analogues of daily age were assembled. All chickens underwent planned veterinary treatments.

The control group of broiler chickens received a basic diet. In the cell containing the test group chicks, 4 autocouples were installed, in which, as they consumed, the feeds enriched with premixes with lactic acid fodder additive (MCD) were filled: I - on the basis of lactobacillus, MKD-L; II - on the basis of lactic thermophilic streptococcus, MKD-C; III - on the basis of bifidobacteria, MKD-B; IV - on the basis of propionic acid bacteria, MKD-P. Premixes based on microorganisms were fed to broiler chickens within three weeks with free access to all feeding troughs. It should be noted that during the experiment in experimental groups, fodder enzymes and antibiotics were not used.

In the process of research, the consumption of feed, fodder supplements of MKD (L, C, P, B), live weight and poultry safety was recorded. After 30 minutes. After the withdrawal of chickens and then at 7, 14 and before slaughter - 42 days. Sampling of fragments of the intestine was carried out to determine the effect of MZD on the formation of a qualitative composition of the intestinal microflora of broiler chickens.

As a result of these studies, the need for broiler chickens in feed additives containing living monocultures of bacteria (bifidobacteria, lactobacillus, propionic acid bacteria and lactic streptococcus) has been determined. In addition, it was revealed that regardless of the age of the chickens, preference was given to representatives of the main species of the intestinal microflora of the bird - bifido- and lactobacilli. The use of premixes based on monocultures in the diet of chicken broilers positively influences the speed and quality of the colonization of the intestinal microflora of chickens by representatives of their own microflora and positively influences the performance and safety of broiler chickens in the process of their growing.