On the basis of the "Komarova" farm (Magadan, Magadan region), the effect of introducing a new non-traditional component feed additive of plant origin into the diets of young cattle was studied. The research was carried out during the stall period. For the experiment there were taken four groups of animals (14-16 months of age) divided at random in accordance with the genotype into control and experimental groups of ten animals each. The first two groups (control, experiment) included purebred Holstein bulls, the other two – hybrids of the 1st generation (1/2 Holstein × 1/2 Herefords). For the experimental groups, the main diet was supplemented with a component feed additive consisting of cedar elfin (Mountain pine) flour and lichens (alpine cladonia (Cladonia alpestris), Icelandic cetraria (Cetraria islandica)). The results of the experiment has shown that the feed additive, consisting of 120 g of cedar elfin needle flour and 50 g of lichen flour (80% of Cladonia alpestris and 20% of Cetraria islandica), has a positive effect on the intensification of metabolic processes in the animals. The digestibility of crude protein increased by 1.29-4,19 g (1.7-5.6 %); that of the organic matter – by 6.65-8.90 g (11.0-14.3 %); NFE (nitrogen-free extracts) – by 7.80-9.18 g (14.14-15.70 %). An increase in the digestibility of feed nutrients had a positive effect on an increase in live weight gain by 0.60-3.0 g (1.35-5.93 %). An increase in feed conversion was 0.24-6.8 MJ (0.20-6.74 %); feed protein – by 0.02-0.09 g (1.22-6.17 %). Crossbred bulls turned out to be more responsive to changes in the ration of feeding and showed better results in all studied parameters. The effectiveness of using the additive is due to the fact that the raw material for the production is obtained from wild plants growing in nature in sufficiently large volumes. They do not require significant costs for harvesting and preparation for feeding.

Проведены исследования по применению кормовой добавки (КД) из нетрадиционных региональных растительных ресурсов: лишайников Cladonia alpestris и Cetraria islandica, морских водорослей (ламинария Laminaria, фукус Fucus) и микроэлементов в рационах кормления коров за 2 мес перед и 2 мес после отела. Использование КД положительно влияло на молочную продуктивность. Наибольшая эффективность ее применения в рационе коров проявлялась в повышении среднесуточного удоя на 1,67 кг (11,4%), жирномолочности — на 0,25 абс.%, содержания белка в молоке — на 0,06 абс.% относительно контроля. Применение КД позволило оптимизировать воспроизводительные функции. У коров опытной группы сервис-период был короче на 24,8%, индекс осеменения меньше в 0,75 раза, чем в контроле. Оплодотворяемость от первого осеменения также была выше у опытных коров (62,5—87,5%). Животные, получавшие дополнительно к основному рациону КД, обладали повышенной воспроизводительной способностью по сравнению с аналогами, не получавшими ее, что позволило успешней использовать первых в процессе воспроизводства стада. Включение в рацион кормовой добавки способствует и повышению экономической эффективности производства. Снижение уровня убыточности в сравнении с применением хозяйственного рациона составило 16,2 п.п. Улучшение всех гематологических показателей сыворотки крови коров показывает, что использование КД оказывает положительное влияние на их организм. На основе результатов исследований разработана кормовая добавка для кормления крупного рогатого скота с использованием нетрадиционных источников кормов в условиях Магаданской области, получен патент на изобретение «Кормовая добавка для крупного рогатого скота с иммуномодулирующим действием». The studies have been carried out on use of feed additive of nontraditional regional  plant resources: lichens, seaweeds, and trace elements in diets for cow feeding for 2 months of dry period and 2 months after calving. Use of the feed additive (FA) influences positively on the milk productivity. The highest efficiency of use of the FA in cattle diet showed in increasing average daily milk yield by 1.67 kg (11.4%), milk fat content by 0.25 absolute percent, milk protein content by 0.06 absolute percent, relative to the control group. Use of the feed additive enables optimizing reproductive function of the cows. The cows in the 2 experimental group had a service period shorter by 24.8%, insemination index lover 0.75 times than those in the control group cows. Fertility from the first insemination was higher in experimental cows (62.5-87.5%). The cows fed the FA in addition to the basic diet have a heightened reproductive abilities as that did not feed it which makes it possible to use the former in the process of the herd reproduction. The inclusion of a feed additive in the diet also contributes to increasing the economic efficiency of production. The decrease in the level of unprofitability in comparison with the use of the ration was 16.2 percentage points. Data of haematological investigations showed that, according to studied  indices, the state of the cows in the experimental groups had improved in comparison wilh ones in the control group. On the basis of results of the studies, a feed additive for cattle feeding has been developed using the nontraditional feed resources in conditions of Magadan region and a patent has been taken out for an invention entitled «Feed additive for cattle possessed an immunomodulating effect».