Influence of complex feed additive on the microstructure of the spleen of white rats

Feeding calves during the dairy period is a very important and responsible moment, since it is during this period that the intensive growth and development of animals, the formation of the immune system, and the reserve for future productivity take place. Therefore, diets should be balanced not only in terms of the nutritional value of the main components, but also in terms of vitamin and mineral composition. Very often, in order for the diet to be balanced in biologically active substances, various feed additives are used, the effectiveness of which varies. Therefore, the purpose of the research was to evaluate the possibility of using and study the effect of liposomal feed additives on the growth and safety of calves. The research was conducted in one of the farms of the Leningrad region. The duration of the experiment was 60 days. During the study period, the drug "LipoLad" was introduced into the diet of experimental animals in the form of a feed additive, the animals of the control group received the main diet of the dairy period. The dynamics of changes in live weight were determined by the results of weighing calves at the ages of 2 and 4 months, in addition, the effectiveness of the drug was checked by the safety of young animals during the study period. At the end of the experiment, biochemical blood tests were performed. As a result of the conducted research, it was found that the use of liposomal feed additives has a positive effect on the growth and safety of young animals.