Effect of the Brown Coal-Based Feed Additive on Poultry Productivity Indicators
This study examined the effect of feed additives based on brown coal on the productivity indicators of laying hens. The Relict A® organo-mineral feed additive for livestock and poultry is a multi-component, gummatized product with a wide range of biological activity, accelerating the growth and development of the animal. Relict A® is an environmentally friendly supplement that does not contain hormones or synthetic compounds. The control group was fed complete feed without additives. The second, third and fourth groups were fed feed containing 0.04%, 0.06% and 0.10% of the studied additives, respectively. The amount of feed for each group of laying hens was strictly normalized in accordance with their age, according to the recommendations for this cross. The use of the Relict A® feed additive in the laying hens’ rations led to an increase in the average number of eggs per laying hen, a decrease in the cost of feed for producing 1 dozen eggs, and a reduction in the time when the poultry reached the peak egg laying intensity. Feeding the additive to laying hens reduced the cost of producing 1 dozen eggs in the experimental groups, and also increased the profitability of chicken eggs in comparison with the control. The best dose was to use 0.06% of Relict A® by weight of the feed. A 26.6% increase in laying hen egg production was found.
Keywords: feed additives, laying hens, egg productivity, brown coal
 Petenko, A. I., et al. (2019). The Efficiency of Using Functional Feed Additives in Combined Feeds for Broiler Chickens. International Journal of Engineering and Advanced Technology, vol. 8, issue 6, pp. 5292-5294.
 Temiraev, R. B., et al. (2018). Effect of Mold Inhibitor and Adsorbent on Broilers Digestive Enzyme Activities and Meat Productivity with Reduced Risk of Aflatoxicosis. Journal of Pharmaceutical Sciences and Research, vol. 10, issue 11, pp. 2900-2902.
 Siegert, W., et al. (2020). Prececal Amino Acid Digestibility and Phytate Degradation in Broiler Chickens when using Different Oilseed Meals, Phytase and Protease Supplements in the Feed. Poultry Science, vol. 98, pp. 5700-5713.
 Lukyanov, N. V., et al. (2013). Humic Acids of Oxidized Brown Coals of Some Deposits in Russia and Mongolia. Bulletin of St. Petersburg State Technological Institute (Technical University), vol. 22, issue 48, pp. 053-055.
 Barylo, B. O., Gilmanova, M. V. and Grekhova, I. V. (2018). The Effect of Humic Preparations from Brown Coal and Lowland Peat on the Test Culture. Presented at Proceedings of the LII International Student Scientific and Practical Conference, March 15, 2018, Tyumen, Russia. Publisher: State Agrarian University of the Northern Trans-Urals (Tyumen), vol. 1, pp. 17-21.
 Gangadoo, S., et al. (2016). Nanoparticles in Feed: Progress and Prospects in Poultry Research. Trends in Food Science & Technology, vol. 58, pp. 115-126.
 Qiu, J. L., et al. (2020). Organic Trace Minerals Improve Eggshell Quality by Improving the Eggshell Ultrastructure of Laying Hens During the Late Laying Period. Poultry Science, vol. 99, pp. 1483-1490.
 Savelyeva, A. V., et al. (2015). Investigation of the Composition and Properties of Humic Acids of Natural and Mechanochemically Oxidized Brown Coal. Chemistry of Solid Fuels, vol. 4, p. 3.
 Burchacka, E., Łukaszewicz, M. and Kułażyński, M. (2019). Determination of Mechanisms of Action of Active Carbons as a Feed Additive. Bioorganic Chemistry, vol. 93, p. 102804.
 Kanmaz, E. Ö. (2019). Humic Acid Formation during Subcritical Water Extraction of Food By-Products using Accelerated Solvent Extractor. Food and Bioproducts Processing, vol. 115, pp. 118-125.
 Khilko, S. L., Efimova, I. V. and Smirnova, O. V. (2011). Antioxidant Properties of Humic Acids from Brown Coal. Chemistry of Solid Fuels, vol. 6, pp. 3.
 Petrova, O. G., Kolberg, N. A. and Rubinsky, I. A. (2012). Characterization of Immunostimulants and their Classification, Agri-food Policy of Russia, vol. 6, pp. 69-71.
 Zou, C., et al. (2020). Comparison of Solid Phase Extraction Methods for the Measurement of Humic-Like Substances (HULIS) in Atmospheric Particles. Atmospheric Environment, vol. 225, p. 117370.
 Vasiliev, A. A., et al. (2018). The Value, Theory and Practice of Using Humic Acids in Animal Husbandry. Agrarian Scientific Journal. vol. 1, pp. 3-6.
 Korsakov, K. V. (2018). The Effect of the Preparation of Humic Acids on the Hatchability of Hatching Eggs and the Quality of Hatched Young. Fundamentals and Prospects of Organic Biotechnology, vol. 4, pp. 27-30.