Efficiency and safety of using different sources of zinc in poultry nutrition

Abstract

Full and balanced diet of poultry with high-quality feeds and availability of minerals is the key to high safety and productivity of animals. The needs of animals for minerals can be met through various forms of compounds: inorganic, organic, chelated and nanoscale. The aim of research was a comparative assessment of influence of various forms of zinc on the productivity and morpho-biochemical parameters of blood of broiler chickens. Replacing the inorganic form of zinc with nanoscale (group I) and organic form (group II) leads to a positive productive effect by the end of the experiment, by 4.6 and 11.1 %, respectively, compared to the control. At the same time, a short-term increase in the number of leukocytes at 28 days of age was observed after feeding with nanoZn (group I) by 40 % (P≤0.05) and by 12.4 % when using its organic form (group II). The concentration of hemoglobin and the number of red blood cells tended to increase in the experimental groups compared with the control at 21, 28 and 35 days of age. The use of various forms of zinc affects the state of biochemical indicators of metabolism in the body, leading to different growth rates of animals. The study showed that it is possible to improve broiler productivity by completely replacing the inorganic form of zinc with an organic or nanoscale one. The obtained result shows the possibility of using these forms in the industrial production of animal feed.