Movchan S. Growth, feed efficiency and slaughter quality of yang meat ducks for different levels of threonine and tryptophane in mixed fodders.

Complemented and extended knowledge in relation to the amino acid nutrition dacks at the intensive methods of their growing by establishment of optimum levels of amino acid in a stern in accordance with conception of ideal protein. Found out positive influence of feeding ducks from 1 to 14-day's age of the mixed fodders with maintenance of total and avalable threonine – 0,72 and 0,64 % accordingly, tryptophane – 0,23 and 0,20 %, from 15 to 42-day's age – 0,58 and 0,52 % and tryptophane – according to 0,16 and 0,14 % on efficiency of the use of nutritives of ration and their productivity. It is proved that the use threonine and tryptophan in optimal doses promotes the growth rate, safety, quality of meat and slaughter ducks, while reducing the cost of feed to increase their body weight.