In the article, results of researches on an establishment of an optimum source of Manganese are resulted. Manganese was additionally added mixed fodder for quails grown for meat. Experimental studies conducted in terms of problem research laboratory of feed additives National University of Life and Environmental Sciences of Ukraine. Independent experiment was conducted with growing Pharaoh Coturnix quails. We conducted a randomized block experiment with 3 treatments, each with 4 replicates of 25 growing birds (1 to 35 d of age). A diet consisting of corn, soybean and sunflower meal, wheat, fish meal, sunflower oil, premix (28% CP, 2.88 kcal of ME/g on 1 to 21d of age, 20.5% CP, 2.97 kcal of ME/g on 22 to 35 d of age) having severally Manganese sulphate, Manganese glycinate and Manganese citrate. Diets and water were offered ad libitum. After 5 weeks of dietary treatments the carcass composition (breast muscles, leg muscles, skin, subcutaneous fat, liver, kidneys, lungs, heart, gizzard) were affected by dietary treatments. Carcass weight and breast muscles was increased (P < 0.05) with organic sources of manganese in the diet. It found little effect (P = 0.053) sources of manganese in the fodder for eviscerated yield. Therefore, Manganese glycinate could be used as a good tool for improving carcass yield of quails.

The article is devoted to the study of the translocation of heavy metals-trace elements (Zn, Cu) in the cereal-legume vegetation of natural fodder lands during their surface improvement (milling with the introduction of sugar-juice defecation sludge, NPK fertilizers) and root improvement (plowing the soil with the introduction of sugar-juice defecation sludge and NPK fertilizers). Based on the analysis of literary sources, it was established that as a result of man-made activities, the condition of fodder lands is deteriorating due to the ingress of toxicants, in particular, heavy metals. The research was conducted in the conditions of natural fodder grounds of the Right Bank Forest Steppe of Ukraine during 2017-2019. The determination of heavy metals in soils and plant material was carried out in the laboratory by the atomic absorption method. The hazard ratio of heavy metals in soils and biodiversity and the accumulation ratio of heavy metals were determined. It was established that in cereal and leguminous vegetation during the three years of vegetation of natural fodder lands in the zone of their local pollution due to surface improvement, the concentration of Zn increased from 1.01 times to 1.07 times, Cu -from 1.01 times to 1.02 times, while with root improvement, the concentration decreased for Zn content from 1.1 times to 1.25 times, and for Cu content -from 1.02 times to 1.55 times. At the same time, a tendency towards a decrease in the hazard coefficients and the accumulation of Zn and Cu in cereal-legume vegetation was noted with the root improvement of natural fodder soils compared to surface ones.

Recently, the requirements for the quality and safety of poultry products have significantly increased, what has notably limited the use of antibiotics in feeding poultry. This is one of the reasons for the growing interest in the use of phytogenic feed additives. We have conducted an experiment to determine the influence of Artemisia capillaris on young quail meat productivity. To carry out the experiment, we have formed five groups, each counting 100 quail heads. During the experiment, which lasted for 35 days, dried powdered wormwood (Artemisia capillaris) in the amount of 0.5%, 1.0 and 1.5% by weight of compound feed was introduced into the feed of birds of the 2 nd , 3 rd and 4 th experimental groups. The experiment showed a positive effect of the studied factor on the body weight of quail; the highest body weight was in quail of the 3 rd group -251.03 g, and the lowest it was in the control group -238.24 g. Also during the experiment, the lowest feed costs per 1 kg of body weight gain were in quail of the 3 rd experimental group, which by this indicator exceeded the control group by 4.91%. Feeding wormwood as a part of the compound feed in the amount of 0.5 and 1.0% of the 2 nd and 3 rd experimental groups increased the weight of gutted carcass by 0.41-1.67%, while further increase of wormwood content to 1.5% in the feed of the 4 th experimental group led to a decrease in the weight of gutted carcass by 0.26% compared to the control group.

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