PRODUCTIVITY OF PIGS DURING REARING AND FATTENING WITH A LOW PROTEIN CONTENT, DIFFERENT RATIOS OF LIMITING AMINO ACIDS AND METABOLIC ENERGY IN THE DIETS

The correct use of the genetic potential of pigs will increase the efficiency of growth, lead to a good feed conversion and a high meat yield. This can be achieved through balanced feeding. The aim of the research was to study the effect of low-protein diets with different content of limiting amino acids and metabolic energy on the productivity of pigs during rearing and fattening. The effect of low-protein diets with more optimal levels of amino acids and metabolic energy on the productivity of pigs during rearing and fattening was studied. The experiment was carried out in the vivarium of the Institute of VNIIFBiP of agricultural animals on crossbred pigs (landrace круп large white; Pic-402 large white). According to the principle of paired analogues, taking into account the live weight, sex, several groups of animals were studied in the equalizing period at the age of piglets 60-65 days (live weight 20-22 kg). It was found that the use of this type of rationing contributes to more efficient protein synthesis in the body of animals, helps to predict and plan the productivity and safety of livestock, the timing of cultivation and fattening and, as a result, to obtain high economic indicators of pork production. When balancing the protein component of diets for pigs, it is necessary to take into account not only the needs for essential amino acids, but also their true ideal availability. An increase in the level of metabolic energy contributed to a decrease in the use of amino acids for energy purposes in the body of pigs; and an increase in their use in the process of protein synthesis.