PECULIARITIES OF USE OF NITROGEN IN FEED OF LOW PROTEIN DIETS BY YOUNG PIGS
Reduction of crude protein level (at balance of essential amino acids) in compound feeds for young pigs at fattening by 5 g per 1 kg of feed contributed to increase of organic matter diestibility by 1,5 %, protein - by 1,5 % and fiber - 1,7 %. Reduction of concentration of crude protein by 10 g in 1 kg of feed increased the efficiency of feed protein use by 3,1 %, compared with the control. The uptake of nitrogen per day per 1 kg of metabolic live weight in experimental groups made about 2,20 g, which is 3,7 % more than in the control. By observing the«ideal ratio» of essential amino acids in a diet it is possible to reduce the amount of crude protein in 1 kg of feed for pigs at fattening without reducing their productivity by 5-10 g.