Balanchuk I. Digestibility of fodder, metabolism and productive qualities of yang meeat ducks for different levels of energy, protein and lysine in mixed fodders

The theoretical and experimental material of using mixed fodders with different levels of metabolisable energy, crude protein and lysine in feeding ducks-broilers of cross "Star 53 H.Y." had been presented in the dissertation. Direction of changing in productive qualities of ducks, forage digestibility, amino acid composition of meat and liver were indicated. The estimation of morphological and biochemical composition of blood was carried out. The morphological and chemical compound of ducks meat, amino acid composition of meat and liver were researched. Feeding ducks-broilers of cross "Star 53 H.Y." is recommended to use mixed fodders in 1-14 days old with a level 1,33 MJ/100 g metabolisable energy, 18,0 % crude protein and 1,1 % lysine; in 15-42 days old 1,43 MJ/100 g, 16,2 and 0,9 %.