One of the prerequisites for improving productivity of ducklings-broilers is their full mineral nutrition. The excess or deficiency of certain mineral elements as well as a violation of their ratio in diets lead to a decrease in the efficiency of nutrient utilisation of feed and, consequently, reduce the productivity of livestock.

The use of premixes as guaranteed micronutrient supplements and vitamins without taking into account their content in the feed contributes to the accumulation of some trace elements in the body of the bird. Considering this, the use of sorbents in the composition of animal feed is topical. Imported sorbents are now very expensive, so their use in poultry farming increases the cost of production.

Alternative sorbents of foreign production are organic sorbents on the basis of plant and yeast cells (oat chaff, wheat bran, alfalfa fiber, extract of yeast cell walls, cellulose, hemicellulose, pectin).

In recent years many countries of the world with intensively developed animal husbandry conduct research on the review and clarifying of norms of mineral nutrition of animals: they study new effective mineral supplements with sorption properties and improve the technologies of their application. Ecosob proves to be such mineral Supplement of organic origin. Its main advantage is a low dose inclusion in the diet, because their molecules have a large surface area that allows absorbing a large amount of toxins.

The aim was to investigate the influence of feed additives Ecosorb on hematological and blood biochemical parameters of ducklings-broiler cross cherry-valley.

On the basis of Bila Tserkva National Agrarian University vivarium was held scientific and business research was held with the use of feed additives Ecosorb in feeding of broilers-ducklings.

Ecosorb is the sorbent of organic origin containing gluconate, tuff, saponite and hydrolytic yeast in its composition.

At the end of the experience when the ducklings were 42 days old, a control slaughter of poultry (4 heads per each group) was arranged and the tissues and organs for carrying out morphological and biochemical studies were selected. The resulting material is processed statistically with the help of the program MS Excel.

The results of the research. It is known that the blood is an indicator of the intensity of the processes of metabolism that occur in animals under the influence of feeding factors. It maintains the stability of the concentration of ionic composition and other parameters of homeostasis, without which the normal function of the organs is impossible. Analysis of blood ducklings-broilers showed that different doses of a sorbent composition of the feed affected the metabolism and the condition of the blood.

Thus, feeding of ducklings-broilers of the 2nd experimental group with the addition of sorbent 0,57 g/kg showed an increase in blood hemoglobin by 0.2%, number of leukocytes – by 36.5%, segmented – by 4,5%; stab – by 30,7% , eosinophils – by 15.1% and a decrease in the content of erythrocytes and monocytes, respectively, by 3.4 and 34.5 per cent compared with such blood counterparts in the control group.

After feeding the ducks of 3rd experimental group feed with the addition of feed additives in the number 0,78 g/kg diet one could observe an increase in the hemoglobin content by 3.0%, leukocyte – by 23,8%, segmented – by 6,8%, palicka nuclear – by 7.7%, lymphocytes – by 0.5% and eosinophils – by 27.3% and a decrease in the content of erythrocytes and monocytes respectively by 7.1 and 54.1% compared with their peers in the control group.

At the same time in the blood of the birds of the 4th experimental group, which were fed by the feed with the addition of the sorbent in the amount of 1 g/kg diet one could discover the increase in hemoglobin by 0.9%, erythrocytes by 3.3%, leukocyte – by 61,9%, segmented – by 14,3%, stab – by 15.4% and a decrease in the content of lymphocytes – by 1.4% and monocytes by 12.1 % compared with bird control group.

The study of biochemical blood parameters gives an opportunity to assess the intensity of metabolic function in the body. Feeding of the ducks-broilers of the 4th experimental group with increased number of feed additives, namely 1 g/kg diet compared with control group led to an improvement in blood total protein by 1.2%, albumin – by 0.5% and to the reduction of uric acid respectively by 61,2% compared with the control group.

The use of sorbent in the composed feed for ducklings-broilers has a positive effect on hematological parameters. The sorbent dose 1 g/kg feed causes the increase of hemoglobin by 3.0%, which indicates the intensity of the flow of metabolic processes in the body.

The best results of biochemical and morphological parameters were observed among ducklings-broilers of 4th experimental group, and all performances were within the physiological norm.

Key words: ducklings broilers, sorbent, hemoglobin, red blood cells, white blood cells, total protein, albumin, globulin, cholesterol, AST, ALT.