Assessment of nutritionality and normative indicators of granulated vitamin-herbal four for agricultural animals, prepared in the conditions of the Vologda region

Feed analysis was carried out in a chemical laboratory using the equipment of the Center for Agricultural Research and Biotechnology at the Voluntary Research Center of the Russian Academy of Sciences. The testing procedure for most agricultural feeds is established by GOST 50817-95. To determine the crude protein content using the Kjeldahl method using a semi-automatic analyzer UDK 159 (VELP, Italy), GOST 13496.4-2019 was used, GOST 31675-2012 was used to determine the crude fiber content using an automatic analyzer FIBE-6, GOST 13496.15-2016 was used to determine crude fat content using the Soxhlet apparatus., GOST 32933-2014 is used to determine the crude ash content. An evaluation test of herbaceous unnaturally dried feed according to the quality class was carried out in the following sequence: when more characteristics were agreed upon for any one class, vitamin-grass meal (VHM) was assessed according to this class. When studying the energy nutritional value, the amount of dry matter in granulated vitamin-herbal flour was established within the range of 867.00–917.69 g, metabolic energy – 9.25–10.57 MJ/kg, digestible protein – 69.9–119.6 g/kg and feed units – 0.71–0.85 kg. Thus, checking the usefulness of the samples that were selected and sent to us showed that feed from alfalfa and clover helps to obtain high-quality nutritious feed that is easily absorbed by the body and corresponds to class II–III indicators. The quality of prepared flour from vetch-oat grass and a mixture of herbs leaves much to be desired. As a result of studying the quality of these artificially dried grass feeds, we can conclude that their nutritional value is not high enough, as a result of the low content of the main characteristics: such as metabolic energy (9.25–9.39 MJ/kg) and protein (11.69–12.83 %), which is necessary take into account when organizing proper feeding of cattle. The quality of feed is a fundamental condition on which productivity depends.