Study of the effect of ultrafine particles on microbiocenosis of the blind intestine of broiler chickens

Introduction. Poultry farming, as the most knowledge-intensive and sustainably functioning branch of animal husbandry, makes a significant contribution to ensuring the country's food security. Considering the importance of the use of promising trace element preparations for modern poultry farming, studies have been undertaken to assess the effects of ultrafine particles of trace element metals on the poultry body. Trace elements are usually used in very small amounts in animal nutrition, but problems such as lower bioavailability, antagonism and a higher rate of excretion from the body limit their effectiveness. Recent studies have also demonstrated the modulation of intestinal health by nanoparticles by increasing the number of beneficial microbes (Lactobacillus and Faecalibacterium) and the production of short-chain fattyacids.

The aim of the studywas to evaluate the effect of ultrafineparticles of copperandirononmicrobiocenosis of the blindintestine of broiler chickens.

Material and methods. During the experiment to assess the effect of ultrafine particles of copper and iron on growth and development, blood parameters, mineral metabolism and microbiocenosis of the blind intestine in the body of broiler chickens on a balanced diet, 105 week-old broiler chickens were selected, which were divided into 3 groups by the method of pairs of analogues (n=35). During the experiment, all the birds were in the same feeding and maintenance conditions. The duration of the main accounting period was 28 days. The poultry of the control group received an experienced diet (ED), I experimental – ED together with UP of iron at a dosage of 17 mg / kg, II experimental – ED together with UP of copper at a dosage of 1.7 mg / kg of feed.

Results. The dosage of iron and copper were chosen taking into account the previously established positive effect. The additional introduction of UP copper into the diet had a growth-stimulating effect throughout the experimental study. At the end of the studies, the maximum increase in live weight was noted in the II experimental group – by 5.12%, in the I group – by 2.64%. Hematological blood parameters of broiler chickens demonstrated a change in the hemostasis system after administration of UP iron and copper. The evaluation of the data obtained indicates the variability of morphological and biochemical parameters within the physiological norm, with a tendency to decrease against the background of the introduction of ultrafine Fe and Cu particles. In the experimental group that received the UP iron preparation with food, Firmicutes (63.42%) dominated among the representatives of phylum, Bacteroidetes (17.34%) and Proteobacteria (7.43%) were also present. Ruminococcaceae (23.03%) and Lachnospiraceae (13.05%) prevailed among the families. Representatives of phylum Firmicutes (67.36%), Bacteroidetes (19.48%) and Proteobacteria (5.23%) were present in the cecum of broiler chickens treated with UP copper at a dosage of 1.7 mg/kg of feed. Among the families, the most numerous were such taxa as Ruminococcaceae (21.58%), Lachnospiraceae (18.67%) and Sphingobacteriaceae (13.10%).

Conclusion. The results of our study demonstrate the need to study the bacterial diversity in the intestines of broiler chickens in order to study the effect of various feed additives on the metabolism and condition of the gastrointestinal tract of poultry.