Influence of mixed feeds with different content of metabolizable energy and aminoacids on productivity of pigs

The use of modern swine breeds, lines and hybrids with high meat characteristics requires effective protein nutrition. Therefore, all meat swine breeds are selected with the use of compound feeds with high level of protein content. Amino acids are the fundamental elements of protein nutrition. Modern systems of amino-acid nutrition of swine allow maximal realization of genetic potential of high meat productivity of animals. For realization of the conception of 'Ideal protein' basic requirement in irreplaceable amino-acids should be taken into account. Daily requirement in replaceable and irreplaceable amino-acids for swine composes 1:1.22. Optimal level of exchangeable energy and amino-acids, influencing meat productivity of swine, is evaluated. Nutritive value of compound feeds and its influence on productivity of piglets is analyzed. Slaughter qualities of swine are calculated. Content of exchangeable energy and lysine in compound feeds of sows is shown. Productivity indexes of experimental sows are presented. Productivity characteristics of hogs are displayed. The ratio of lysine and other essential amino-acids as well as lysine amount content per 1 MJ of metabolized energy is considered to be an important factor of full value of compound feeds. Standards of essential amino-acids content in mixed feeds taking into account their availability allow increasing significantly the productivity of all sex and age-related groups of pigs. It's identified that increase of amino-acid feeding level of young animals promotes the perfection of meat traits of animals and decrease of nutrients consumption, including protein counted per 1 kg of weight gain.