Numerous studies have shown that sapropel is an effective source of macro-and microelements, as well as biologically active substances. There are about 3 million lakes on the territory of Russia, where sapropel reserves are estimated at 250 billion tons. There are 497 lakes on the territory of the Tyumen region, the estimated reserves of sapropel in them are 1398,7 million tons. The Tyumen region is a biogeochemical province for all normalized trace elements. Biologically active compounds obtained from natural raw materials, including normalized trace elements in organic form are the most promising and safe. Under the inviroments of the Tyumen region, such natural raw materials can be sapropels. The study of the effectiveness of the use of sapropels and their influence on the metabolism and milk productivity of cattle is an urgent topic. The purpose of the research was to study the influence of sapropel lake Nepryak on milk productivity indicators and the biochemical composition of the blood of cows. For the experiment 3 groups of cows have been formed (a control group and two experimental ones) based on the principle of pairs of analogs. Cows of the 1st experimental group have been got in the ration of 300 g of sapropel per head/day, 2nd experimental – 500 g/head/day. Cows of the control group did not receive sapropel in the ration. It has been found as the result of research that the use of sapropel lake Nepryak in feeding of cows in doses of 300 and 500 g/head/day had the positive influence on their milk productivity. At the same time, it is most effective to feed sapropel at the dose of 300 g/ head/day.

As a result of hard breeding work, people managed to achieve extremely high productivity from pigs, which entailed increased requirements for the feed quality, keeping conditions and microclimate. Pigs receive the main amount of energy from cereal grains, some energy comes from protein splitting and to a lesser extent - due to fat feed. The difference in the amount of exchange energy can reach up to 5 MJ. The lower the amount of energy in the diet, the more the animal needs to consume feed, so PVMA should be added to cereal mixtures to balance the diets by nutrients. Over the past decades, full combined fodder has become the most reliable food source for pigs. Being based on former feed mills, local enterprises are purchasing new equipment and mastering new technologies of modern combined fodder and protein-vitamin-mineral additives production for different types and age-sex groups of farm animals.

The main characteristic of sorbents is their polarity. The function of additives is based on their ability to connect and remove harmful substances from the animal stomach. The paper describes the influence of natural sorbentszeolite and bentonite-on nutrient digestibility, milk productivity and its chemical composition. The introduction of 200 g of zeolite into the diet of cows allowed increasing the digestibility coefficients of crude protein by 3.17%, crude fiber by 5.07%, and hence producing 4% of milk per 256.34 kg or by 10.82% more. The use of bentonite increases the dry matter digestibility by 1.68%, crude fat-by 1.52, crude fiber-by 6.48%, which in turn increased milk production by over 655.63 kg.

Unbalanced mineral and vitamin nutrition of lactating cows can be a critical factor in the realization of their productive potential. The development and introduction into production of inexpensive, but effective feed additives is the main trend of improving the feeding of modern animal husbandry. Under the conditions of the Tyumen region such natural raw materials can be sapropels, which successfully combine a variety of biologically active substances. The purpose of the research was to study the digestibility of nutrients and energy metabolism in lactating cows when sapropel is included in the ration. Scientifi c and economic experiment in the study of the effectiveness of feeding sapropel lake Nepryak has been carried out in the training and experimental farm of the State Northern Trans-Urals Agrarian University. The animals of the control group have been fed the main diet. Cows of the 1st and 2nd experimental groups have been fed 300 and 500 g of sapropel per head/day, respectively, in addition to the main ration. It has been found as a result of research that the introduction of sapropel into the ration of cows has a positive effect on the digestibility of nutrients. The digestibility coefficients were higher in the animals of the 1st and 2nd experimental groups compared with the cows of the control group. Cows from the experimental groups digested all the organic substances of the ration better. During the experiment period cows of the 1st and 2nd experimental groups in contrast to the control group had higher milk yield by 11,31 and 10,38 %, respectively, milk protein yield by 10,56 and 5,95 %, milk fat yield by 17,18 and 12,99 %. It has been established that the introduction of sapropel into the ration of cows has the positive effect on the digestibility of nutrients, contributes to the increase of milk productivity, normalizes the metabolism in the body.