Environmental justification for using of active yeast in laying hens diet

The results of the studying of active yeasts Saccharomy cescerevisiae influence on the egg-laying capacity and morphological characteristics of the hens "NOVOgen brown" breed eggs are presented. The nutritional intervention of active yeast Saccharomy cescerevisiae in laying hens diet allowed to increase egg-laying capacity by 3.7-6.6% and improve the morphological composition of the eggs. However, feed conversion in experimental groups was by 5.1-7.9% lower in relation to the control group. Keywords: Hens; combined feed; amino acid; Saccharomy cescerevisiae; productivity References: Artemieva, O. A. , & Logvinova, T. I. (2018). Use of feed yeast in quail farming. Veterinaria i Kormlenie, 5, 34-37. doi:10.30917/att-vk-1814-9588-2018-5-12 Barrow, P. A. (1992). Probiotics for chickens. Probiotics, pp: 225-257. doi:10.1007/978-94-011-2364-8_10 Fysynyn, V. Y. , Fysynyn, A. N. , Tyshhenkov, Y. A. , & Egorov, V. Y. (1998). Ocenka kachestva kormov, organov, tkanej, yay`cz y` myasa pty`zy. Metodycheskoe rukovodstvo VNYTYP. Sergyev Posad. 114 (in Russian). Halasz, A. (2017). Chemical Composition and Biochemistry of Yeast Biomass. Use of Yeast Biomass in Food Production, pp: 23-44. Ibatulin, I. I. , Zhukors`kiy, O. M. (2017). Metodologiya ta organizaciya naukovy`h doslidzhen` u tvary`nny`cztvi: posibny`k. K. Agrarna nauka (in Ukrainian). Inatomi, T. (2016). Laying performance, immunity and digestive health of layer chickens fed diets containing a combination of three probiotics. Science Postprint, 1(2), e00058. doi:10.14340/spp.2016. 03a0001 Lu, J., Qu, L. , Shen, M. M. , Wang, X. G. , Guo, J., Hu, Y. P., Dou, T. C. , & Wang, K. H. (2019). Effects of high-dose selenium-enriched yeast on laying performance, egg quality, clinical blood parameters, organ development, and selenium deposition in laying hens. Poultry Science, 98(6), 2522-2530. doi:10.3382/ps/pey597 Makarynska, A. V. , & Vorona, N. V. (2019). Theoretical basis of physiology of the holiday young agricultural agricultural birth. Scientific Works, 82(2), 29-34. doi:10.15673/swonaft.v82i2. 1146 Petuhova, E. A. , Bessarabova, R. F. , Xaleneva, L. D. , & Antonova, O. A. (1989). Zootehny`chesky`j analy`z kormov. M. : Agropromy`zdat. 239 (in Russian). RodriguezâNavarro, S. , Llorente, B. , RodriguezâManzaneque, M. T. , Ramne, A. , Uber, G. , Marchesan, D. , Dujon, B. , Herrero, E. , Sunnerhagen, P., & PerezâOrtin, J. E. (2002). Functional analysis of yeast gene families involved in metabolism of vitamins B1 and B6. Yeast, 19(14), 1261-1276. doi: 10.1002/yea.916 Yalcin, S. (2014). Effects of dietary yeast cell wall on performance, egg quality and humoral immune response in laying hens. Ankara Universitesi Veteriner Fakultesi Dergisi, 61(4), 289-294. doi:10.1501/vetfak_0000002644 Svezhenczov, A. Y. , Gorlach, S. A. , & Martynyak, S. V. (2008). Komby`korma, premy`ksy, BVMD dlya zhy`votnyh y` pty`czy. Dnepropetrovsk. ART-PRESS. 412 (in Ukrainian). AwiA tkiewicz, S. , Koreleski, J., & Arczewska, A. (2010). Laying performance and eggshell quality in laying hens fed diets supplemented with prebiotics and organic acids. Czech Journal of Animal Science, 55(7), 294-306. Tsap, S. V. , Orishshuk, O. S. , Ruban, N. O. , & Musich O. I. (2016). Produkty`vna diya kormovy`x dobavok iz vvedenyam pal`movogo zhy`ru na peretravnist` kormu ta produkty`vnist` kurchat-brojleriv. Naukovo-texnichny`j byuleten` NDCz biobezpeky` ta ekologichnogo kontrolyu resursiv APK, 4(1), 274-278 (in Ukrainian). Utterback, P. L. , Parsons, C. M. , Yoon, I. , & Butler, J. (2005). Effect of upplementing selenium yeast in diets of laying hens on egg selenium content. Poultry Science, 84(12), 1900-1901. doi:10.1093/ps/84.12. 1900 Yegorov, B. V. , & Chernega, I. S. (2016). Rozrobka i vy`kory`stannya netrady`cijny`h kormovy`h dobavok u godivli kurej-nesuchok. zernovi produkty` i kombikormy. DOI: 10.21691/gpmf.v61i1. 103 (in Russian).