Golubev M. Digestibility of fodder, metabolism and productive qualities of yang ducks cross Star 53 H.Y. for different levels of calcium and phosphorus in mixed fodders

The theoretical and experimental material of using mixed fodders with different levels of calcium and phosphorus in feeding ducklings -broilers of cross Star 53 H.Y. had been presented in the dissertation. Direction of changing in productive qualities of ducks, forage digestibility, balance of chemical elements and mineral structure of a bone fabric. It is identified the levels of available phosphorus in mixed fodders for ducklings-broilers. The estimation of morphological and biochemical composition of blood was carried out. The morphological and chemical compound of ducks meat, mineral composition of meat were researched. Feeding ducklings-broilers is recommended to use mixed fodders from 1 to 14 days old with a levels 1,1 % calcium, 0,9 % and 0,54 % total phosphorus and available from 15 to 42 days old - a levels 1,1 % calcium, 0,9 % total and 0,38 % available phosphorus.