Effect of the Cresacin Feed Additive on the Digestibility of Nutrients, Productivity and Egg Quality in Egg Laying Quails

The purpose of the article was to study the effect of the Cresacin feed additive on the digestibility and use of nutrients in the diet of egg laying quails, as well as their egg productivity and quality. The experiment was carried out on 600 heads of one-day-old quails of the Estonian breed, which were divided into four similar groups of 150 heads each. The optimization of this additive in the diets of the quails improved the digestibility of dry and organic substances compared to the birds from the control group by 2.25 and 2.16%, crude protein by 3.38%, crude fat by 2.67%, crude fiber by 2.76% and nitrogen free extractive substances by 1.16%. The optimization of the amount of this additive in the compound feed for egg laying quails in the second experimental group also increased the use coefficient of nitrogen, calcium, and phosphorus in their diet. It improved growth energy, egg productivity, and egg quality compared to the control group. To improve the quality of feeding quails, increase their productivity and normalize metabolic processes in the body, the authors recommend introducing Cresacin into their diet in the amount of 50 mg/100 g of compound feed.