Nedashkivsky V. Digestibility forages, a metabolism and productive qualities of chickens-broilersfor different levels of a energy and protein feed.

Object - mixed fodders with various levels of metabolic energy, a crude protein, lysine and methionine for chickens - broilers.Methods of researches - the problems put in work were solved experimentally with use zootechnic (meat efficiency, lethal qualities, digestibility and balance of nutrients, a chemical compound of meat and a liver); biochemical (the contents of amino acids and fat acids in meat and a liver, morphological structure of blood) and statistical methods of researches.Scientific novelty of the received results consists in an experimental substantiation of optimum levels metabolic energy, protein and amino acid nutrition of chickens-broilers cross "Cobb-500". The requirement of chickens - broilers for metabolic energy, a crude protein, lysine and methionine is established on the periods of growing.Influence of different levels energetic, protein and amino acid nutrition of chickens-broilers on their growth and development, digestibility nutrients, balance of nitrogen of an organism, safety of a livestock, the contents of the basic nutrients, amino acids and fat acids in meat and a liver, morphological and biochemical structure of blood is determined.The purpose and research problems. The purpose of work - to establish optimum levels metabolic energy, protein and amino acid nutrition chickens-broilers and to find out their influence on meat efficiency, quality of meat, digestibility feeds and a metabolism in an organism.Results of researches - may be used in research establishments by development of nutrient requirements of chickens-broilers, at the enterprises for production of poultry farming and in educational process by preparation of experts in animal husbandry.Area - animal husbandry.