eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2016-06-25 13 2 991 997 10.13005/bbra/2125 14221 article Yuri Nikolayevich Prytkov 1 Anna Aleksandrovna Kistina 1 Maxim Yurievich Chervyakov 1 FSBEI HPE garev Mordovia State University, 68, Bolshevistskaya str., Saransk, 430005, Republic of Mordovia, Russia. There was implemented the research on the study of the effect of different doses of selenium organic preparation Selenium Yeast on nutrient digestibility of the diet substances, morphological, biochemical parameters and mineral composition of blood, and egg productivity. According to the principle of analog pairs, there were formed 4 experimental groups, each of which received a certain dosage of the preparation with a daily ration. The research has given the results that addition of Selenium Yeast at a dose of 150 grams per ton of compound animal feed stuff of laying hens enhances digestibility of nutrients, normalizes homeostasis parameters, increases egg production and egg weight, and improves morphological parameters. https://www.biotech-asia.org/vol13no2/influence-of-different-dosages-of-selenium-yeast-in-the-diets-of-laying-hens-cross-lohmann-brown-on-metabolic-indices-and-egg-productivity/ Selenium Yeast;egg production;egg weight;digestibility;hemoglobin;compound animal feedstuff;egg yolk;egg shell;eggshell thickness;selenium