Nitrogen metabolism in broiler chickens with different duration of administration of “ENT-OIL IDROROUGE HM”

An alternative to the use of antibiotics for farm animals are pro- and prebiotics, organic acids and feed additives with vegetable and other ingredients. Of particular interest are complex preparations such as “ENT-OIL Idrorouge HM”. It contains essential oils (cinnamon oil and capsicum oil), citric, formic, propionic and acetic acids. The study object was broiler chickens of cross Ross- 308. The aim was the period of application of the preparation. 3 groups of 60 heads each were formed according to the principle of analogous pairs. The first group of chickens (control) received the basic diet corresponding to the growth stage from birth to the moment of slaughter. The poultry of the experimental groups, in addition to the basal diet, were injected through the drinking system with “ENT-OIL Idrorouge HM” at a dose of 0.5 g per 1 l of water. The second group was injected from the 5th to the 38th day, and the third one was injected from the 23rd to the 29th day. In the blood the growth rate, safety and indicators of nitrogen metabolism (total protein and its fractions, urea, creatinine) were monitored. It was found that the long-term consumption of the additive contributed to the growth of live weight by 5.9% (p<0.05) relative to the control group, and the short-term consumption contributed to the growth by 5.0% (p<0.05). The indicators of nitrogen metabolism during permanent intake of the additive did not have significant reliable differences from the control group, and when short-term feeding, a significant increase in the concentration of urea and creatinine by 17.9% (p<0.05) and 51.3% (p<0.001) was shown by its end (the 29th day). This difference was leveled by the slaughter (the 38th day). The safety of livestock during the experiment was 96.7%, in the first group, 100% in the second experimental group and 98.3% in the third one