The article presents the results of studying the effect of modified diatomite as part of a complex additive at the ratio of saturated and unsaturated fatty acids in cow’s milk. Production and physiological tests were carried out on the basis of a dairy farm LLC “Agrofirma Tetyushskoe” in the Ulyanovsk region on black-and-white cows of 2...3 lactation. For the physiological experiment, animals were selected by the method of analogues by live weight, number and month of lactation, pregnancy, and physiological state. The complex additive included modified diatomite, diacetophenonyl selenide containing organic selenium (DAFS), sunflower oil, and feed yeast. Additive based on 250 g/head/day mixed with feed once a day was administered in the diet of animals of the experimental group, the other group was a control and received no additive. The additive had an effect on the fatty acid composition of milk and contributed to an increase in the fraction of saturated fatty acids with a short chain. In the fat fraction, the amount of saturated short-chain fatty acids increases by 4.0% due to an increase in the content of capric (by 6.7%), lauric (by 12.3%, P<0.05), myristic (by 13.3%, P<0.05), palmitic (by 17.1%, P<0.05), which is a positive factor and indicates an active synthesis of volatile fatty acids, primarily acetate and 3-hydroxybutyrate. At the same time, there was a sharp decline in the content of stearic (27.3%, P<0.05) and arachinic (27.6%, P<0.05) acids. The milk of cows in the experimental group showed a decrease in the level of monounsaturated fatty acids by 7.4%.

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Relevance. Modern livestock breeders face an important task of producing organic products, in Russia this is regulated by the Federal Law “On Organic Products” (from 01.01.2020), it allows producers to enter in the state register and mark the products with the “organic” sign. There is a problem of deterioration of the quality of milk, low content of fat, protein, SOMO, deficiency of macro-and microelements, vitamins, which is associated with a violation of the proper feeding of animals. The use of innovative technologies for the activation and modification of silicon-containing minerals (diatomite and zeolite clinoptilolite) enhances their properties. This makes it possible to use them as an adsorbent, an ion exchanger and a source of readily available silicon and other mineral elements to produce high-quality organic products.Methods. To achieve this goal, in the Ulyanovsk region we organized a production experience in the conditions of a dairy farm of “Agrofirma Tetyushskoe” for a duration of 100 days. Three groups of 50 cows were formed: 1st — control, received only the basic diet (ОR), 2nd — experimental (ОR+ supplement based on modified zeolite enriched with amino acids), 3rd — experimental (ОR+ supplement based on modified diatomite enriched with amino acids). The supplement was given once a day, in the morning in a mixture with mixed feed, the input rate was 250 g/head/day. For the physiological experiment, 5 analog cows were selected in a group. To enrich the minerals, a complex of plant-derived amino acids of high purity and biological activity was used.Results The intake of additives based on silicon-containing natural minerals (zeolite and diatomite), processed with innovative technologies and enriched with plant-based amino acids, increases the level of animal productivity and ensures the yield of organic products high-quality. It has a prolonging effect.

The influence of highly structured silicon-containing zeolite enriched with the amino acid complex "VitaAmin" on the general state of the body and productivity indicators in dairy cows and calves was studied. The object of the study for this purpose was selected black-and-white cattle. The first group – control, the second-experience, with the introduction of supplements in the diet. As an additive, we used natural zeolite from the Yushanskoye deposit in the Ulyanovsk region, which was subjected to technological processing in the factory. We used a new technology of activation, structuring, dehydration, and enrichment of zeolite with amino acids. This supplement is of pure natural origin, does not contain chemical components. In young animals, the average daily weight gain increases by 14.9 %, compared with the control. The average daily milk yield of cows during the experiment was 24.7 kg of milk, compared to 20.88 kg in the control. The increase was 3.82 kg per day, for the experiment 0.687 tons of milk was obtained additionally due to the use of the additive. Under its influence, the processes of milk synthesis, metabolism, and anabolic processes in young animals are activated in the body of cattle.

Целью работы являлось изучение параметров микроклимата в помещениях для содержания телят раннего возраста черно-пестрой породы, при использовании цеолита в составе подстила в качестве поглотителя аммиака и влаги. Опыт проведен в производственных условиях молочно-товарной фермы в Ульяновской области ООО Агрофирма «Тетюшское». Для намеченной цели использовали цеолит месторождения «Юшанское» Ульяновской области, модифицированный (обработанный под влиянием высоких температур). Опыт проводили в переходный зимне-весенний период. Содержали молодняк: новорожденных телят-в индивидуальных клетках в родильном отделении, телят раннего возраста-в клетках по 10 животных в телятнике. Подстил из цеолита использовали в комплексе с соломой из расчёта 500 г/1 м 2 /неделю. Параметры микроклимата изучали общепринятыми методами. Применение подстила из цеолита модифицированного и соломы в сочетании 1:4 показало улучшение микроклимата родильного отделения и телятника. При достаточно низкой температуре +5,43…6,1 0 С в помещении для телят наблюдалась нормализация таких показателей, как влажность воздуха до 60,54….60,82 % и концентрации аммиака до 0,0029…0,0030 %, микробной загрязнённости до 10 тыс/м 3. Содержание телят чёрно-пёстрой породы раннего возраста в помещениях с использованием цеолитсодержащего подстила оказывает благоприятное влияние не только параметры микроклимата, но и способствует выращиванию здорового молодняка, снижению и профилактике ряда заболеваний.