THE PRODUCTIVITY OF BREEDING HENS AND GUALITY PRODUCTS FOR USE IN FEEDING THREONINE

Introduction of ?L-threonine? to the level of 0,60 and 0,63% to the wheat and the corn and soy-bean mixed fodder for breeding chickens in pre-productive (18-23 weeks) and productive (24-51 weeks) periods significantly increased live weight - by 110 g (from 1,93 to 2,04 kg), egg production ? by 6,7 things (from 114,4 to 121,1 things), egg fertilization ? by 1,1%, output of the young birds - 2,4%, the number of incubative eggs - by 7,6 (from 106,6 to 114,2 things) and reduces the use of feed for 10 incubative eggs - by 140 g (from 2,11 to 1,97 kg).