Enzymatic activity of the rumen microbiota and intensity of growth of young ewes under the alimentary action of prebiotic supplement ISGD

The article presents the results of experimental research on changes in the enzymatic activity of the rumen microbiota and the intensity of growth of young ewes when using as a part of the compound feed of a new prebiotic made on the basis of baking yeast Saccharomyces cerevisiae "Inactivated Dry Glutathione Yeast" (ISGD), manufactured by the "Enzym" company (Lviv city).The research was carried out in the conditions of the sheep farm of the State Enterprise "Experimental Farm "Hrusiatychi" (Lviv region, Zhydachiv district, Hrusiatychi village) and the department of small animal husbandry of the Institute of Agriculture of the Carpathian region of the National Academy of Agrarian Sciences of Ukraine.For this purpose, 4 groups of 11-month-old young ewes with a live weight of 38.0-38.2kg, 5 animals each, were formed.The duration of the experiment -2 months (February -March).The main ration of the control group young ewes consisted of 1.1 kg of meadow cereal-herb hay and 0.5 kg of standard compound feed.Animals of the first, second, and third experimental groups were additionally fed ISGD prebiotic as part of compound feed in amounts, respectively: 1.0; 1.4 and 1.8 % of its mass.At the end of the experimental period, after the morning feeding, from 3 animals of each investigited groups, with the help of oro-esophageal probe, ruminal fluid was collected, in which the enzymatic activity of the microbiota was determined.In order to determine the intensity of growth of the young ewes, their monthly weighing was carried out.The live weight of the animals was determined at the beginning and at the end of the experimental period.It has been established that the use of the prebiotic in the feed of animals in doses of 1.0; 1.4 and 1.8 % of the weight of concentrate feed increases the enzymatic activity of amylolytic, proteolytic and cellulolytic microorganisms of the rumen by 13.7-120.5;1.9-19.0and 5.2-10.5 %, compared to animals that did not receive such a supplement as part of the diet.