In 2015-2016, OJSC Lynevsky Plemazavod in Smolensk District of Altai Territory studied the use of LipoCar vitamin feed additive on large white breed pigs. The experiment was carried out on pregnant sows and then on piglets obtained from them. In the control group and 2 experimental groups the sows received the main ration of the farm, and the sows of 1 and 3 experimental groups were additionally fed the feed additive "LipoCar" in a dose of 2.1 g per head per day for 20 days.After weaning the piglets during the growing period 4 groups of young animals were formed. In the control and 1 experimental group young animals were fed only the main ration of the farm. In addition to the basic diet, piglets from groups 2 and 3 received the feed additive "LipoCar" from the age of 60 days for 40 days. The use of the feed additive contributed to an increase in the live weight of 2 and 3 experimental groups at the age of 5 and 6 months by 4.8-11.7% (p≤0.05-0.001). Pigs in groups 1, 2 and 3 in the age group 4 to 5 months had higher average daily increases of 10.3-15.8% (p<0.05-0.001) compared to controls. The live weight of 100 kg of young animals in groups 2 and 3 with a difference of 5.5-7.9% (p≤0.05-0.01) in relation to control was reached more quickly. Animals of all experimental groups had a higher slaughter yield by 1.6-3.1%. Pigs in the 3 experimental groups had a 15.2% (p≤0.01) lower fat thickness than in control variant. There is a tendency to increase the moisture-bonding ability of pigs of the first experimental group by 1.8% as opposed to the control group. The tendency to a higher content of dry matter by 1.9-5.2% and protein by 1.7-2.2% in the meat of pigs of experimental groups is established.

The article presents the results, the purpose of which was to study the effect of the tissue biostimulant obtained from the slaughterhouse tankage of antler deers on some indicators of the immune status of heifers at the age of 6 months. Experimental studies were carried out in 2020 on the basis of Prigorodnoye Uchkhoz JSC of the Industrial District of Barnaul, the Altai Territory. For the experiment, we selected one-month-old heifers with an average live weight of 51.0 kg. Throughout the experiment, the animals of the experimental groups were given 1 injection in 1, 2, 3, 4, 5 and 6 months of raising with an interval of 30 days. The study preparation was administered subcutaneously into the lower third of the neck. Animals in the control group were administered with saline from 1 to 5 months of raising at a dose of 3 ml/head, at 6 months. - 6 ml/head, to analogs of the I experimental group from 1 to 5 months - 2 ml/head. At 6 months. - 4 ml/head, in II - from 1 to 5 months. - 3 ml/head, at 6 months - 6 ml/head, in III - from 1 to 5 months. - 4 ml/head at 6 months - 8 ml/head. According to the results of the experiment, it was found that the heifers of experimental group II had the best immune status, in which the largest increase of the indicators of spontaneous Nitro Blue Tetrazolium Reduction Test (NBT-test) was noted - by 12.5% (p≤0.01), of stimulated NBT-test - by 10.0% (p ≤0.05), of phagocytic index - by 5.8% (p≤0.05) in comparison with the control.

The reproductive traits of sows are of paramount importance in the production of high-quality pork. The world experience of pig farming shows the need to solve first of all the feed problem. Diets unbalanced in the content of vitamins restrain the manifestation of genetically inherent high prolificacy of sows. The purpose of the research was to study the influence of feeding the vitamin feed additive “LipoCar” on the reproductive traits of sows and the biochemical parameters of blood serum. The results of research on the introduction of vitamin feed additive “LipoCar” into the diet of pregnant sows have been presented in the article. The experiment has been carried out in the production conditions in JSC “Linevsky pedigree farm” on sows of Large White breed. Pregnant sows have received a basic diet, balanced for all the normalized elements of nutrition. Sows of the experimental group in the composition of the basic diet fed the feed additive “LipoCar”. The dosage of the drug “Lipocar” was 2,1 g/head/day. “Lipocar” has been fed for 20 days. The total duration of the experiment was 3 months. When introducing the vitamin feed additive “LipoCar” into the main diet of sows in the second half of pregnancy the increase in the number of piglets in the litter by 1,6-6,8 % and the weight of the litter – by 5,6-56,2 % (P ≤ 0,001) have been revealed in comparison with the control group of animals. There was a higher content of carotene in the blood serum of sows of the experimental group by 50,0 % (P ≤ 0,01), vitamin A - by 48,7 % (P ≤ 0,05), and total protein – by 4,9 % (P ≤ 0,05).

The effect of a new biological preservative representing a mix of lyophilized Lactobacillus plantarum VKPM V-4173, Lactococcus lactis subsp. lactis VKPM V-2092 and Propionibacterium acidipropionici VKPMV-5723 strains (40 : 40 : 20) on the quality of haylage prepared from a mix of vetch, oats, and pea has been studied. The total bacteria content in the preservative was 1·1011 CFU/g. Five different variants of conservation of alfalfa haylage prepared at the budding stage were evaluated under laboratory conditions. The variants included a self-conserved control and the preservative at two different dosages (3 and 6 g/ton) with and without the addition of cellulolytic enzymes. The best results were observed in the case of both the enzyme-free and the enzyme-containing preservative at the dosage equal to 6 g/ton. These variants provided the maximum protein content in the haylage (94.3% and 94.5% of the initial content, respectively) and a high content of lactic acid (62.9% and 65.4% of the total acid content, respectively) and also good organoleptic characteristics. The determined optimum biopreservative dosage was tested under industrial conditions using 750 tons of vetch-oats-pea haylage. The use of the biopreservative provided a high-quality haylage of high nutritive value. Industrial evaluation of the effect on the productivity of milk cattle (n = 15) of the addition of the biopreservative to the haylage showed that the maximum average daily yield of milk with basic fat content (3.4%) was obtained from cows of the experimental group whose ration included haylage prepared with the use of the studied preservative. This yield came to32.7 kg , which exceeded the yield for the control group (fed on self-conserved haylage) by 7.0%. Three months feeding of cows with the haylage prepared with the use of the new preservative brought a significant saving of money (4,862 rubles per a head at the prices of 2015–2016).

Проведена оценка влияния нового биологического консерванта, представляющего собой смесь лиофильно высушенных бактерий: Lactobacillus plantarum ВКПМ В-4173; Lactococcus lactis subsp. lactis ВКПМ В-2092 и Propionibacterium acidipropionici ВКПМ В-5723 (в соотношении 40:40:20), на качество заготавливаемого силоса из кукурузы. Общее содержание бактерий в консерванте составляло 110 11 КОЕ/г. В лабораторном опыте были оценены различные варианты консервирования путем закладки зеленой массы кукурузы в лабораторные сосуды: без консерванта, а также в присутствии консерванта в количестве 1.0, 2.0 и 3.0 г на тонну закладываемой массы. Оценка содержания аммиака, рН, количества кислот и их соотношения, а также химического состава образцов корма в динамике (7-й, 21-й и 60-й дни закладки) показала, что наилучшие результаты обеспечивает внесение консерванта в количестве 3.0 г/т.Производственные испытания изучаемого биоконсерванта в дозировке 3.0 г/т показали, что, по сравнению с кормом, приготовленным без внесения консерванта, использование исследуемого консерванта при закладке кукурузного силоса обеспечило лучшую сохранность питательных веществ и более оптимальные рН и соотношение кислот в силосной массе. Проведенные производственные испытания с оценкой эффекта скармливания силоса, заготовленного по различным технологическим вариантам, на продуктивные качества молочных коров черно-пестрой породы (n = 12) показали, что максимальный среднесуточный удой молока базисной жирности был получен от коров опытной группы, получавших в составе рациона кукурузный силос, приготовленный с внесением нового биоконсерванта. Величина этого удоя составила 28.86 кг, что на 4.0% выше, чем удой в контрольной группе животных. Скармливание силоса с внесением биологического консерванта коровам опытной группы способствовало увеличению в рубцовом содержимом подопытных животных количества летучих жирных кислот и бактерий с одновременным снижением количества аммиака, что свидетельствует об улучшении процессов пищеварения. Перевариваемость всех питательных веществ рациона у коров опытной группы была выше, чем у животных контрольной группы.Ключевые слова: силос, биологический консервант, коровы, молочная продуктивность. IMPROVEMENT OF THE SILAGE QUALITY AND MILK PRODUCTIVITY OF CATTLE BY THE USE OF A NEW LIOPHYLIZED BIOLOGICAL PRESERVATIVE